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Operation Manual – MSTP 
H3C S9500 Series Routing Switches 

Chapter 1  MSTP Configuration

 

1-41 

II. Network diagram 

 

Figure 1-7 

Network diagram for VLAN Ignore configuration 

III. Configuration procedure 

1)  Enable VLAN Ignore on Switch B. 

# Enable VLAN Ignore on VLAN 2. 

<SysnameB> system-view 

[SysnameB] stp ignored vlan 2 

2)  Verify the configuration 

# Display the VLAN Ignore-enabled VLANs. 

[SysnameB] display stp ignored-vlan 

STP-Ignored VLAN: 2 

1.7  Configuring Digest Snooping 

As defined in IEEE 802.1s, interconnected devices are in the same region only when 
the region related configuration (domain name, revision level, VLAN-to-MSTI mappings) 
on them is identical. An MSTP enabled device identifies devices in the same MST 
region via checking the configuration ID in BPDU packets. The configuration ID 
includes the region name, revision level, configuration digest that is in 16-byte length 
and is the result computed via the HMAC-MD5 algorithm based on VLAN-to-MSTI 
mappings. 

In practical networking implementations, since MSTP implementations differ with 
vendors, the configuration digest computed using private keys is different; hence 
different vendors’ devices in the same MST region can not communicate with each 
other. 

Enabling the Digest Snooping feature on the associated port can make a device 
communicate with another vendor’s device in the same MST region.  

1.7.1  Configuration Prerequisites 

Associated devices of different vendors are interconnected and run MSTP. 

1.7.2  Configuration Procedure 

Follow these steps to configure Digest Snooping: 

Содержание S9500 Series

Страница 1: ...H3C S9500 Series Routing Switches Operation Manual Hangzhou H3C Technologies Co Ltd http www h3c com Manual Version T2 081655 20080530 C 2 03 Product Version S9500 CMW520 R2132...

Страница 2: ...InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co Ltd All other trademarks that may be mentioned in this manual are the property of their respective owners Notice The information i...

Страница 3: ...commands Organization H3C Configuration Manual is organized as follows Part Contents 00 Product Overview includes Obtaining the Documentation Product Features and Features 01 Access Volume includes Et...

Страница 4: ...nfiguration MPLS L3VPN Configuration MPLS Hybrid Insertion Configuration and GRE Configuration 06 QoS ACL Volume includes QoS Configuration and ACL Configuration 07 Security Volume includes 802 1x Con...

Страница 5: ...y Alternative items are grouped in braces and separated by vertical bars A minimum of one or a maximum of all can be selected x y Optional alternative items are grouped in square brackets and separate...

Страница 6: ...cription Warning Means reader be extremely careful Improper operation may cause bodily injury Caution Means reader be careful Improper operation may cause data loss or damage to equipment Note Means a...

Страница 7: ...describes z POS port overview z POS port configuration GVRP GVRP is a GARP application The volume describes z GARP overview z GVRP configuration Link Aggregation Link aggregation means aggregating se...

Страница 8: ...configuration z VLAN types z Super VLAN overview and configuration z Isolate user VLAN overview and configuration QinQ QinQ is a technique that enables packets to be transmitted across the operators b...

Страница 9: ...e 1 4 1 1 5 Configuring Physical State Change Suppression on an Ethernet Interface 1 5 1 1 6 Configuring Loopback Testing on an Ethernet Interface 1 5 1 1 7 Configuring a Manual Port Group 1 6 1 1 8 C...

Страница 10: ...Configuring Physical State Change Suppression on an Ethernet Interface Optional Configuring Loopback Testing on an Ethernet Interface Optional Configuring a Manual Port Group Optional Configuring Traf...

Страница 11: ...d to provide internetworking support between different countries regions or devices of different manufacturers The regenerator section trace byte J0 is usually set to a section access point identifier...

Страница 12: ...ly z Half duplex mode half Interfaces operating in this mode can either send or receive packets at a given time z Auto negotiation mode auto Interfaces operating in this mode determine their duplex mo...

Страница 13: ...Mbps or auto negotiation z When an O E converter is used for an interface set the duplex mode of the interface to auto for the interface to operate normally 1 1 4 Configuring Flow Control on an Ethern...

Страница 14: ...cal link state changes link delay delay time Required Defaults to 1 second 1 1 6 Configuring Loopback Testing on an Ethernet Interface You can enable loopback testing to check whether the Ethernet int...

Страница 15: ...iginal configurations will be restored 1 1 7 Configuring a Manual Port Group To make the configuration task easier for users certain devices allow users to configure on a single port as well as on mul...

Страница 16: ...Ethernet interface view interface interface type interface number Enter Ethernet interface view or port group view Enter port group view port group manual port group name aggregation agg id Use eithe...

Страница 17: ...Statistics Complete the following configuration tasks to configure the time interval for collecting interface statistics Use the display interface command to display the interface statistics within th...

Страница 18: ...size is set in the range 9193 to 10240 10240 takes effect 1 1 11 Configuring the MDI Mode of an Ethernet Interface You can connect an Ethernet interface with a crossover or straight through cable dep...

Страница 19: ...ce MAC address is that of the VLAN interface which the outbound interface corresponds to However It is required in some cases that the source MAC addresses of packets forwarded through different inter...

Страница 20: ...er Available in any view Display the brief information of Ethernet interfaces display brief interface interface type interface number begin include exclude text Available in any view Display the ports...

Страница 21: ...ggable optical modules display transceiver interface interface type interface number Available in any view Display the radio frequency identification RFID information of pluggable optical modules disp...

Страница 22: ...onfiguration 1 1 1 1 Overview 1 1 1 1 1 SONET SDH 1 1 1 1 2 POS 1 1 1 2 Configuring a POS Interface 1 1 1 3 Displaying and Maintaining POS Interfaces 1 3 1 4 POS Interface Configuration Example 1 3 1...

Страница 23: ...reducing signal loss and investment in devices 1 1 2 POS Packet over SONET SDH POS is a technology popular in WAN and MAN POS maps length variable packets directly to SONET synchronous payloads and u...

Страница 24: ...exadecimal 16 for C2 In SDH framing the defaults are 15 0x0 for both J0 and J1 In SONET framing the defaults are 0x01 for J0 and 62 0x0 for J1 Set the framing format frame format sdh sonet Optional Th...

Страница 25: ...ng on POS interfaces z If a physical interface is idle or has no cable connection shut down it with the shutdown command to avoid interface anomalies that may result from interference z As the shutdow...

Страница 26: ...k protocol ppp SwitchA Pos1 1 1 mtu 1500 SwitchA Pos1 1 1 shutdown SwitchA Pos1 1 1 undo shutdown 2 Configure Switch B Configure interface POS 4 1 1 SwitchB system view System View return to User View...

Страница 27: ...If your switch is connected to another switch directly check that the clock mode of the local POS interface is opposite to that on the connected POS interface Symptom 2 The physical layer is up but t...

Страница 28: ...1 1 1 GARP 1 1 1 1 2 GVRP 1 4 1 1 3 Protocols and Standards 1 4 1 2 Configuring GVRP 1 5 1 2 1 Configuring GVRP Functions 1 5 1 2 2 Configuring GARP Timers 1 5 1 3 Displaying and Maintaining GVRP 1 7...

Страница 29: ...registration protocol GARP provides a mechanism that allows GARP participants in a LAN to distribute propagate and register with other participants some attributes such as VLAN IDs or multicast addres...

Страница 30: ...oin timer to set the interval between the two sending operations z Leave timer Starts upon receipt of a Leave message If no Join message has been received from the requesting entity before this timer...

Страница 31: ...GARP PDUs GARP PDU structure Message structure Attribute List structure Attribute structure Protocol ID Message N End Mark Attribute 1 End Mark Attribute Type Attribute Length Attribute Event Attribut...

Страница 32: ...on The VLAN registration information propagated by GVRP includes both manually configured local static entries and dynamic entries from other devices GVRP provides the following three registration mod...

Страница 33: ...commands Depending on the view you accessed the subsequent configuration takes effect on a port or all ports in a port group Enable GVRP on the port gvrp Required Disabled by default Configure the GV...

Страница 34: ...mer or Leave timer garp timer hold join leave timer value Optional The default is 10 centiseconds for the Hold timer 20 centiseconds for the Join timer and 60 centiseconds for the Leave timer When con...

Страница 35: ...the GARP statistics reset garp statistics interface interface list Available in user view 1 4 GVRP Configuration Example 1 4 1 GVRP Configuration Example I I Network requirements Configure GVRP for dy...

Страница 36: ...port SysnameB Ethernet1 1 2 gvrp SysnameB Ethernet1 1 2 quit Create VLAN 3 a static VLAN SysnameB vlan 3 SysnameB vlan3 return 3 Verify the configuration Display dynamic VLAN information on Switch A S...

Страница 37: ...ll Enable GVRP on Ethernet 1 1 1 SysnameA Ethernet1 1 1 gvrp Set the GVRP registration mode to fixed on the port SysnameA Ethernet1 1 1 gvrp registration fixed SysnameA Ethernet1 1 1 quit Create VLAN...

Страница 38: ...he switches Set the forbidden GVRP registration mode on the trunk port of Switch A and keep the default normal mode on the trunk port of Switch B II Network diagram Figure 1 4 Network diagram for GVRP...

Страница 39: ...s SysnameB interface ethernet 1 1 2 SysnameB Ethernet1 1 2 port link type trunk SysnameB Ethernet1 1 2 port trunk permit vlan all Enable GVRP on Ethernet 1 1 2 SysnameB Ethernet1 1 2 gvrp SysnameB Eth...

Страница 40: ...on 1 5 1 3 Load Sharing in a Link Aggregation Group 1 6 1 4 Service Loop Group 1 7 1 5 Link Aggregation Port Group 1 7 Chapter 2 Link Aggregation Configuration 2 1 2 1 Configuring Link Aggregation 2 1...

Страница 41: ...up each other This section covers these topics z LACP z Consistency Considerations for Ports in an Aggregation Note Note the following when employing link aggregation on an S9500 routing switch z Up...

Страница 42: ...configurations In a manual or static LACP aggregation the selected ports share the same operational key 1 1 2 Consistency Considerations for Ports in an Aggregation Group To participate in load sharin...

Страница 43: ...proaches to Link Aggregation Two ways are available for implementing link aggregation as described in Manual Link Aggregation and Static LACP link aggregation 1 2 1 Manual Link Aggregation I Overview...

Страница 44: ...You need to avoid the situation however as the selected unselected state of a port may become different after a reboot Note Currently the number of the selected ports in a manual aggregation group cr...

Страница 45: ...ort or those located on a board different from the master port because of hardware restriction Member ports in up state can be selected if they have the configuration same as that of the master port T...

Страница 46: ...to ensure consistency As one configuration change may involve multiple ports this can become troublesome if you need to do that port by port As a solution you may add the ports into an aggregation por...

Страница 47: ...ort belongs to VLAN 1 For ports that are already in a service loop group you can perform configurations that do not conflict with the service loop group for them such as QoS Note Currently for the S95...

Страница 48: ...tion Manual Link Aggregation H3C S9500 Series Routing Switches Chapter 1 Link Aggregation Overview 1 8 For more information about port groups refer to Ethernet Interface Configuration in the Access Vo...

Страница 49: ...g a Manual Link Aggregation Group Follow these steps to configure a manual aggregation group To do Use the command Remarks Enter system view system view Create a manual aggregation group link aggregat...

Страница 50: ...Enter Ethernet interface view interface interface type interface number Configure the port LACP priority lacp port priority port priority value Optional 32768 by default Assign the Ethernet port to t...

Страница 51: ...oup To do Use the command Remarks Enter system view system view Configure a name for a link aggregation group link aggregation group agg id description agg name Required Not configured by default Caut...

Страница 52: ...enced by a module or the service loop group contains ports whose attributes conflict with the intended service type z You can use the undo link aggregation group command to remove a service loop group...

Страница 53: ...type agg id Available in any view Display summaries for all link aggregation groups display link aggregation summary Available in any view Display detailed information about specified or all link aggr...

Страница 54: ...net 1 1 1 SwitchA Ethernet1 1 1 port link aggregation group 1 SwitchA Ethernet1 1 1 quit SwitchA interface ethernet 1 1 2 SwitchA Ethernet1 1 2 port link aggregation group 1 SwitchA Ethernet1 1 2 quit...

Страница 55: ...g 1 2 1 2 Configuring Local Port Mirroring 1 4 1 3 Configuring Remote Port Mirroring 1 5 1 3 1 Configuring a Remote Source Mirroring Group on the Source Device 1 5 1 3 2 Configuring a Remote Destinati...

Страница 56: ...s 1 1 Introduction to Port Mirroring Port mirroring is to copy the packets passing through a port called a mirroring port to another port called the monitor port connected with a monitoring device for...

Страница 57: ...cal remote source and remote destination The following subsections describe how local port mirroring and remote port mirroring are implemented I Local port mirroring In local port mirroring all packet...

Страница 58: ...ort in the remote probe VLAN z Intermediate device Intermediate devices if any are devices located in between the source device and the destination device An intermediate device forwards mirrored pack...

Страница 59: ...rts 1 2 Configuring Local Port Mirroring Configuring local port mirroring is to configure local mirroring groups A local mirroring group comprises one or multiple mirroring ports and one monitor port...

Страница 60: ...orts in it 1 3 Configuring Remote Port Mirroring Configuring remote port mirroring is to configure remote mirroring groups When doing that configure the remote source mirroring group on the source dev...

Страница 61: ...ing ports In Ethernet interface view quit Required Use either approach In system view you can assign a list of ports to the mirroring group at a time In interface view you can assign only the current...

Страница 62: ...LAN operating as a remote probe VLAN you need to remove the VLAN from the remote mirroring group first with the undo mirroring group remote probe vlan command Removing the probe VLAN can invalidate th...

Страница 63: ...robe vlan id If the port is a trunk port port trunk permit vlan rprobe vlan id Assign the monitor port to the remote probe VLAN If the port is a hybrid port port hybrid vlan rprobe vlan id tagged unta...

Страница 64: ...ted to port Ethernet 1 1 1 of Switch C through Switch A z Host B is connected to port Ethernet 1 1 2 of Switch C through Switch B z A data monitoring server is connected to port Ethernet 1 1 3 of Swit...

Страница 65: ...Configuration Example I Network requirements On a network shown in Figure 1 5 z Host A is connected to port Ethernet 1 1 1 of Switch A z Host B is connected to port Ethernet 1 1 2 of Switch A z Port...

Страница 66: ...t mirroring group Sysname mirroring group 1 remote source Create VLAN 2 Sysname vlan 2 Sysname vlan2 quit Configure VLAN 2 as the remote probe VLAN of the remote port mirroring group Add port Ethernet...

Страница 67: ...iew Configure port Ethernet 1 1 1 as a trunk port and configure the port to permit the packets of VLAN 2 Sysname interface ethernet 1 1 1 Sysname Ethernet1 1 1 port link type trunk Sysname Ethernet1 1...

Страница 68: ...5 Configuring Ringlet Selection Table 1 11 1 5 1 Adding a static ringlet selection entry 1 12 1 5 2 Configuring default ringlet selection 1 12 1 6 Configuring Rate Limiting 1 12 1 7 Configuring Statio...

Страница 69: ...layer protocol designed for transferring mass data services over MANs It can operate on synchronous optical network synchronous digital hierarchy SONET SDH dense wavelength division multiplexing DWDM...

Страница 70: ...o adjacent stations are connected by a pair of unidirectional logical channels called links transmitting in opposite directions These two links form a span A span on which data frames are not allowed...

Страница 71: ...when it reaches the destination station or when its time to live TTL expires Different from traditional ring technologies where unicast frames are removed from the ring at the source station RPR adopt...

Страница 72: ...performs automatic topology discovery to collect such information as the number of stations ring state order of the stations on the ring to build a topology database This database does not change afte...

Страница 73: ...re used When a station on the ring starts initializing or detects a topology change it sends TP frames to propagate topology information throughout the network When doing that it sends the first nine...

Страница 74: ...the point of failure to the opposing ringlet The two ringlets thus form a closed single ring around the point of the failure As shown in Figure 1 6 after the span between station A and station B fail...

Страница 75: ...llowing protection hierarchy listed in the order of decreasing severity z Forced switch FS z Signal fail SF related to current physical status z Signal degrade SD related to current physical status z...

Страница 76: ...ransits to the idle protection state after entering the automatic protection state z Hold off timer defines the delay for the physical layer PHY to report a protection request after detecting a link f...

Страница 77: ...nd For how to configure them refer to Ethernet Port Configuration z RPR logical ports support STP QoS and ACL 1 1 8 Protocols and Standards The RPR implementation follows the following document IEEE80...

Страница 78: ...default Caution All the stations on an RPR ring must adopt the same protection mode for the ring to operate normally 1 4 Configuring Protection Reversion Mode Two protection reversion modes are availa...

Страница 79: ...nistratively configured to specify the ringlet for delivering a frame to a destination station z Dynamic ringlet selection table is built dynamically based on the topology database z Default ringlet s...

Страница 80: ...Static ringlet selection entries take effect only when the RPR ring is closed 1 5 2 Configuring default ringlet selection Follow these steps to configure default ringlet selection To do Use the comman...

Страница 81: ...he lowest priority Follow these steps to assign reserved bandwidths to service classes To do Use the command Remarks Enter system view system view Enter RPR logical interface view interface interface...

Страница 82: ...nterface view interface interface type interface number Configure the weight of the station rpr weight ringlet0 ringlet1 value Optional The value argument is an exponent of 2 By default the fairness w...

Страница 83: ...low these steps to configure an RPR POS interface To do Use the command Remarks Enter system view system view Enter RPR POS interface view interface rprpos interface number Required Configure SD 1 and...

Страница 84: ...ill be lost as a result z The rpr port type command can only take effect on 10 Gbps POS and 10GE physical ports It cannot take effect on 2 5 Gbps POS ports 1 11 Configuring Station Name Follow these s...

Страница 85: ...on an RPR logical interface For each tunnel you need to specify its frame copying station In addition to distinguish traffic destined to the same MAC address but using different tunnels you need to co...

Страница 86: ...Test the connectivity to a specific station rpr echo mac mac address c value r ringlet0 ringlet1 reverse s ringlet0 ringlet1 t value Required If the number of test frames is not specified c value 5 te...

Страница 87: ...ce type interface number Display RPR VLAN tunnels display rpr tunnel vlan vlan id1 to vlan id2 all valid invalid interface type interface number Note The above table shows the display command with the...

Страница 88: ...steps to configure Station B through Station E Configure a static ringlet selection entry for frames destined for Station B to travel Ringlet 1 Sysname Ten GigabitEthernet1 1 1 rpr static rs 000f e25...

Страница 89: ...0 0 000f e257 0004 1 2 dynamic 0 0 0 0 000f e257 0005 1 1 dynamic 0 0 0 0 Total entries 4 1 16 2 RPR VLAN Tunnel Configuration Examples I Network requirements On an RPR network station A uses interfa...

Страница 90: ...t vlan 10 Configure a tunnel for VLAN 10 traffic to reach station D Sysname Ten GigabitEthernet1 1 1 rpr tunnel vlan 10 dest mac 000f e200 8582 ringlet1 Verify the configuration of the RPR VLAN tunnel...

Страница 91: ...Overview 1 1 1 1 1 Types of OAMPDUs 1 1 1 1 2 OAM Connection Establishment 1 2 1 1 3 OAM Standards 1 5 1 2 OAM Configuration Task List 1 5 1 3 Configuring Basic OAM Functions 1 5 1 4 Configuring Link...

Страница 92: ...ntly Ethernet OAM is mainly used to address common link related issues on the last mile By enabling Ethernet OAM on two devices connected by a point to point connection you can monitor the status of t...

Страница 93: ...AMPDUs and Loopback control OAMPDUs are commonly used which are described as follows z Information OAMPDUs are used for passing the state information about an Ethernet OAM entity including the informa...

Страница 94: ...cesses Those operating in passive OAM mode however wait and respond to OAM connection establishment requests and take corresponding operations The following table compares active OAM mode with passive...

Страница 95: ...nterval exceeds the threshold Error frame period event An error frame period event occurs if the number of frame errors in specific number of received frames exceeds the threshold Error frame seconds...

Страница 96: ...ests and the peer responds to them If the peer operates in the loopback mode it returns all the PDUs to the senders along the original paths Performing remote loopback testing periodically helps to de...

Страница 97: ...sent by their peers z No OAM connection can be established between two OAM entities operating in passive OAM mode z With OAM enabled you cannot change the OAM operating mode To do so you need to disab...

Страница 98: ...be greater than the corresponding detection interval otherwise no error frame second event can be created To save bandwidth you can configure OAM to report an error event when the number of errors det...

Страница 99: ...ling OAM loopback testing results in all the data communications being stopped After OAM loopback testing is disabled all the ports involved will be shut down and then brought up z OAM loopback testin...

Страница 100: ...statistics about the error frames received by Switch A II Network diagram Figure 1 2 Network diagram for OAM configuration III Configuration procedure 1 Configure Switch A Configure Ethernet 4 1 2 to...

Страница 101: ...d 1 2 Configure Switch B Configure Ethernet 4 1 2 to operate in active OAM mode the default OAM mode and enable OAM for it Sysname system view Sysname interface ethernet 4 1 2 Sysname Ethernet4 1 2 oa...

Страница 102: ...uring Ports as Edge Ports 1 29 1 3 11 Configuring Whether Ports Connect to Point to Point Links 1 30 1 3 12 Configuring the Mode a Port Uses to Recognize Send MSTP Packets 1 31 1 3 13 Enabling the MST...

Страница 103: ...1 45 1 8 2 Configuration Procedure 1 45 1 8 3 Configuration Examples 1 45 1 9 Configuring Protection Functions 1 46 1 9 1 Configuration Prerequisites 1 48 1 9 2 Enabling the BPDU Guard Function 1 48 1...

Страница 104: ...s in the network by exchanging information with one another and eliminate loops by selectively blocking certain ports until the loop structure is pruned into a loop free network structure This avoids...

Страница 105: ...an STP network a root port is a port on a non root bridge device Among the ports on an STP enabled device the root port has the lowest path cost to the root bridge The root port takes charge of commu...

Страница 106: ...ed bridge for the LAN is Switch B and the designated port is BP2 on Switch B Note All the ports on the root bridge are designated ports 4 Path cost Path cost is a reference value used for link selecti...

Страница 107: ...e root path cost is 0 designated bridge ID is the device ID and the designated port is the local port z Selection of the optimum configuration BPDU Each device sends out its configuration BPDU and rec...

Страница 108: ...the network assumes itself to be the root bridge with the root bridge ID being its own device ID By exchanging configuration BPDUs the devices compare one another s root bridge ID The device with the...

Страница 109: ...iguration BPDU As a result the port can receive BPDUs but cannot send BPDUs or forward data Note When the network topology is stable only the root port and designated ports forward traffic while other...

Страница 110: ...ration BPDU from Switch B that is 1 0 1 BP1 As the configuration BPDU of the local port that is 0 0 0 AP1 is superior to the received configuration BPDU the received configuration BPDU is discarded z...

Страница 111: ...ration BPDU Switch B discards the received configuration BPDU BP1 0 0 0 AP1 BP2 1 0 1 BP2 Switch B z Switch B compares the configuration BPDUs of all its ports and determines that the configuration BP...

Страница 112: ...uperior CP2 acts as a designated port and Switch C sends the generated configuration BPDU through CP2 periodically Root port CP1 0 0 0 AP2 Designated port CP2 0 10 2 CP2 z Next port CP2 receives the u...

Страница 113: ...ved the configuration BPDU and the received configuration BPDU is superior to the configuration BPDU of the port the device will increase message age carried in the configuration BPDU by a certain rul...

Страница 114: ...newly elected root port or designated port must wait twice the forward delay time before it begins to forward data The delay ensures that the new configuration BPDU has been propagated throughout the...

Страница 115: ...ts of all VLANs are forwarded along the same spanning tree 2 Features of MSTP The multiple spanning tree protocol MSTP overcomes the shortcomings of STP and RSTP In addition to support for rapid netwo...

Страница 116: ...d z They have the same region name z They have the same VLAN to MSTI mapping configuration z They have the same MSTP revision level configuration z They are physically linked with one another In area...

Страница 117: ...ons in a switched network If you regard each MST region as a device the CST is a spanning tree computed by these devices through STP or RSTP The red lines in Figure 1 4 describe the CST 5 CIST Jointly...

Страница 118: ...ng switch is connected to a third party s device that supports boundary port recognition the third party s device may malfunction in recognizing a boundary port 10 Roles of ports MSTP calculation invo...

Страница 119: ...learns MAC addresses and forwards user traffic z Learning the port learns MAC addresses but does not forwards user traffic z Discarding the port neither learns MAC addresses nor forwards user traffic...

Страница 120: ...h MST region through computing and at the same time MSTP regards each MST region as a single device and generates a CST among these MST regions through computing The CST and ISTs constitute the CIST o...

Страница 121: ...ridge while all others as leaf nodes Task Remarks Configuring an MST Region Required Specifying the Root Bridge or a Secondary Root Bridge Optional Configuring the Work Mode of MSTP Device Optional Co...

Страница 122: ...P Feature Required Performing mCheck Optional Configuring the VLAN Ignore Feature Optional Configuring Digest Snooping Optional Configuring No Agreement Check Optional Configuring Protection Functions...

Страница 123: ...currently effective MST region configuration information display stp region configuration Optional Available in any view Note Two or multiple devices belong to the same MST region only when they are...

Страница 124: ...y the system I Specifying the current device as the root bridge of a specific spanning tree Follow these steps to specify the current device as the root bridge of a specific spanning tree To do Use th...

Страница 125: ...same instance on two or more than two device z When the root bridge of an instance fails or is shut down the secondary root bridge if you have specified one can take over the role of the instance How...

Страница 126: ...it is connected with a legacy STP device the port connecting with the legacy STP device will automatically migrate to STP compatible mode I Configuration procedure Follow these steps to configure the...

Страница 127: ...setting configured on the regional root bridge will be used as the maximum number of hops of the MST region The regional root bridge always sends a configuration BPDU with a hop count set to the maxim...

Страница 128: ...the MST region to 30 Sysname system view Sysname stp max hops 30 1 3 6 Configuring the Network Diameter of a Switched Network Any two stations in a switched network are interconnected through specific...

Страница 129: ...3 7 Configuring Timers of MSTP MSTP involves three timers forward delay hello time and max age You can configure these three parameters for MSTP to calculate spanning trees I Configuration procedure...

Страница 130: ...n and causes waste of network resources We recommend that you use the default setting z If the max age time setting is too small the network devices will frequently launch spanning tree computing and...

Страница 131: ...to configure the timeout factor To do Use the command Remarks Enter system view system view Configure the timeout factor of the device stp timer factor number Optional 3 by default Note z Timeout tim...

Страница 132: ...tional 10 by default Note If the maximum transmission rate setting of a port is too big the port will send a large number of MSTP packets within each hello time thus using excessive network resources...

Страница 133: ...e z With BPDU guard disabled when a port set as an edge port receives a BPDU from another port it will become a non edge port again z If a port directly connects to a user terminal configure it to be...

Страница 134: ...inks If a port works in auto negotiation mode and the negotiation result is full duplex this port can be configured as connecting to a point to point link z If a port is configured as connecting to a...

Страница 135: ...is effective on the current port only configured in port group view the setting is effective on all ports in the port group Configure the mode the port uses to recognize send MSTP packets stp complian...

Страница 136: ...view the setting is effective on the current port only configured in port group view the setting is effective on all ports in the port group Enable the MSTP feature for the port s stp enable Optional...

Страница 137: ...f port connected links On an MSTP compliant device ports can have different priorities in different MSTIs Setting an appropriate path cost allows VLAN traffic flows to be forwarded along different phy...

Страница 138: ...802 1t Private standard 0 65535 200 000 000 200 000 10 Mbps Single Port Aggregated Link 2 Ports Aggregated Link 3 Ports Aggregated Link 4 Ports 100 100 100 100 2 000 000 1 000 000 666 666 500 000 2 0...

Страница 139: ...nter port group view port group manual port group name aggregation agg id User either command Configured in Ethernet interface view the setting is effective on the current port only configured in port...

Страница 140: ...Is and the same port can play different roles in different MSTIs so that data of different VLANs can be propagated along different physical paths thus implementing per VLAN load balancing You can set...

Страница 141: ...Configuring Whether Ports Connect to Point to Point Links 1 4 9 Configuring the Mode a Port Uses to Recognize Send MSTP Packets Refer to section Configuring the Mode a Port Uses to Recognize Send MSTP...

Страница 142: ...system view Enter Ethernet interface view interface interface type interface number Perform mCheck stp mcheck Required Caution The stp mcheck command is meaningful only when MSTP is configured to oper...

Страница 143: ...lated result of MSTP 1 6 2 Configuration Procedure Follow these steps to configure VLAN Ignore To do Use the command Remarks Enter system view system view Enable VLAN Ignore for a VLAN stp ignored vla...

Страница 144: ...ice identifies devices in the same MST region via checking the configuration ID in BPDU packets The configuration ID includes the region name revision level configuration digest that is in 16 byte len...

Страница 145: ...configuration digest z With the Digest Snooping feature enabled comparison of configuration digest is not needed for in the same region check so the VLAN to MSTI mappings must be the same on associate...

Страница 146: ...n procedure 1 Enable Digest Snooping on Switch A Enable Digest Snooping on Ethernet 1 1 2 SysnameA system view SysnameA interface ethernet 1 1 2 SysnameA Ethernet1 1 2 stp config digest snooping Enabl...

Страница 147: ...Figure 1 9 and Figure 1 10 show the rapid state transition mechanism on MSTP and RSTP designated ports Figure 1 9 Rapid state transition mechanism on the MSTP designated port Figure 1 10 Rapid state t...

Страница 148: ...ps to configure No Agreement Check To do Use the command Remarks Enter system view system view Enter Ethernet interface view interface interface type interface number Enter Ethernet interface or port...

Страница 149: ...uard z Root guard z Loop guard z TC BPDU attack guard Note Among loop guard root guard and edge port setting only one function can take effect on the same port at the same time These protection functi...

Страница 150: ...links may be led to low speed links resulting in network congestion To prevent this situation from happening MSTP provides the root guard function to protect the root bridge Ports with root guard func...

Страница 151: ...specific period 10 seconds after it receives a TC BPDU At the same time the system monitors whether other TC BPDUs are received within that period If so the device will perform another removing operat...

Страница 152: ...anual port group name aggregation agg id User either command Configured in Ethernet interface view the setting is effective on the current port only configured in port group view the setting is effect...

Страница 153: ...group Enable the loop guard function for the ports s stp loop protection Required Disabled by default II Configuration example Enable the loop guard function for Ethernet 1 1 1 Sysname system view Sy...

Страница 154: ...n Examples I Network requirements Configure MSTP so that packets of different VLANs are forwarded along different spanning trees The specific configuration requirements are as follows z All devices on...

Страница 155: ...region instance 4 vlan 40 SysnameA mst region revision level 0 Activate MST region configuration manually SysnameA mst region active region configuration SysnameA mst region quit Configure Switch A a...

Страница 156: ...ation information that has taken effect SysnameB display stp region configuration Oper configuration Format selector 0 Region name example Revision level 0 Instance Vlans Mapped 0 1 to 9 11 to 29 31 t...

Страница 157: ...nameD stp region configuration SysnameD mst region region name example SysnameD mst region instance 1 vlan 10 SysnameD mst region instance 3 vlan 30 SysnameD mst region instance 4 vlan 40 SysnameD mst...

Страница 158: ...a VLAN 1 9 1 5 Configuring the Protocol Based VLAN 1 10 1 5 1 Introduction to the Protocol Based VLAN 1 10 1 5 2 Configuring the Protocol Based VLAN 1 11 1 6 Displaying and Maintaining VLAN 1 12 1 7...

Страница 159: ...ommunication medium is shared in Ethernet If the number of the hosts in the network reaches a certain level problems caused by collisions broadcasts and so on emerge resulting in improper network oper...

Страница 160: ...N Fundamental To enable switches to identify packets of different VLANs the VLAN tag field is inserted into the data link layer encapsulation of packets The format of the packets carrying the VLAN tag...

Страница 161: ...4095 are reserved by the protocol the actual value of this field ranges from 1 to 4094 A network device determines the VLAN to which a packet belongs to by the VLAN ID field the packet carries The VLA...

Страница 162: ...tion text Optional VLAN ID is used by default for example VLAN 0001 Note If a device is installed with a board that provides POS interfaces that is the LSB1SP4 LSB1P4G8 or LSB1UP1 board we recommend y...

Страница 163: ...used by default Bring up the VLAN interface undo shutdown Optional By default a VLAN interface is up The state of a VLAN interface also depends on the states of the ports in the VLAN If all the ports...

Страница 164: ...LAN 1 is the default VLAN for all ports However this can be changed as needed z An Access port only belongs to one VLAN Therefore its default VLAN is the VLAN it belongs to and cannot be configured z...

Страница 165: ...p the packet if its VLAN is not permitted to pass through Send the packet if the VLAN ID is allowed on the port You can use the port hybrid vlan command to configure whether the port keeps or strips t...

Страница 166: ...vlan vlan id Optional By default the system will add all ports to VLAN 1 Note Ensure that you create a VLAN first before trying to add an Access interface to the VLAN 1 4 3 Assigning a Trunk Port to a...

Страница 167: ...group view Follow these steps to configure the Hybrid port based VLAN To do Use the command Remarks Enter system view system view Enter Ethernet interface view interface interface type interface numbe...

Страница 168: ...ch is determined by the encapsulation format and protocol type A port can be associated to multiple protocol templates An untagged packet that is packet carrying no VLAN tag reaching a port associated...

Страница 169: ...lc dsap dsap id ssap ssap id ssap ssap id snap etype etype id Required Return to system view quit Enter Ethernet interface view interface interface type interface number Enter Ethernet interface view...

Страница 170: ...that has already been configured with a protocol template remove the association between the VLAN and the protocol template first z You cannot remove a protocol template that has already been applied...

Страница 171: ...meA vlan100 quit Enter Ethernet interface view of Ethernet 1 1 1 SysnameA interface ethernet 1 1 1 Configure Ethernet 1 1 1 as a trunk port and configure its default VLAN ID as 100 SysnameA Ethernet1...

Страница 172: ...e vlan 2 Sysname vlan2 protocol vlan ipv4 Sysname vlan2 quit Sysname vlan 6 Sysname vlan6 protocol vlan ipv6 Sysname vlan6 quit Configure Ethernet 1 1 1 and Ethernet 1 1 2 as hybrid ports which permit...

Страница 173: ...ith each other they use the IP address of the virtual interface of the super VLAN as the IP address of the gateway As the IP address is shared by all sub VLANs IP addresses are saved For different sub...

Страница 174: ...N interface of the super VLAN z For more information about the local proxy arp enable command refer to ARP Commands in the IP Services Volume z A VLAN that is configured as a super VLAN cannot be conf...

Страница 175: ...he sub VLANs VLAN 2 VLAN 3 and VLAN 5 z Ports Ethernet 0 1 1 and Ethernet 0 1 2 belong to VLAN 2 Ethernet 0 1 3 and Ethernet 0 1 4 belong to VLAN 3 and Ethernet 0 1 5 and Ethernet 0 1 6 belong to VLAN...

Страница 176: ...an2 port ethernet 0 1 1 ethernet 0 1 2 Create VLAN 3 add ports Ethernet 0 1 3 and Ethernet 0 1 4 to it Sysname vlan2 vlan 3 Sysname vlan3 port ethernet 0 1 3 ethernet 0 1 4 Create VLAN 5 add ports Eth...

Страница 177: ...ry VLANs are working is not its concern In this way network configurations are simplified and VLAN resources are saved z Secondary VLANs are used for connecting users Secondary VLANs are isolated from...

Страница 178: ...re that at least one port has the secondary VLAN as its default VLAN 5 Configure the mapping between the isolate user VLAN and the secondary VLAN Follow these steps to configure isolate user VLAN To d...

Страница 179: ...ws adding ports to and removing ports or VLANs from the mapped isolate user VLAN and secondary VLAN z On the ports in a secondary VLAN do not create MAC address entries with the VLAN ID being that of...

Страница 180: ...gure 3 2 Isolate User VLAN configuration diagram III Configuration procedure The following are the configuration procedures for Switch B and Switch C 1 Configure Switch B Configure the isolate user VL...

Страница 181: ...between the isolate user vlan and the secondary VLANs SysnameC vlan2 quit SysnameC isolate user vlan 6 secondary 2 to 3 IV Verification Display the isolate user VLAN configuration on Switch B Sysname...

Страница 182: ...e User VLAN Configuration 3 6 VLAN Type static Isolate user VLAN type secondary Route Interface not configured Description VLAN 0003 Tagged Ports none Untagged Ports Ethernet1 1 3 Ethernet1 1 5 The is...

Страница 183: ...tents Chapter 1 QinQ Configuration 1 1 1 1 Introduction to QinQ 1 1 1 1 1 Understanding QinQ 1 1 1 1 2 Implementations of QinQ 1 2 1 1 3 Adjustable TPID Value of QinQ Frames 1 2 1 2 Configuring Basic...

Страница 184: ...e VLAN tags allowing for up to 4094 4094 VLANs thus satisfying the demand for large amount of VLANs in MANs QinQ encapsulates the private network VLAN tag in the public network VLAN tag and enables th...

Страница 185: ...the QinQ feature is implemented through enabling the basic QinQ feature on ports With the basic QinQ feature enabled on a port when a frame arrives at the port the port will tag it with the port s de...

Страница 186: ...h other vendors devices you are allowed to modify the TPID value in a QinQ frame so that the frame carries the TPID value of the specific vendor on the public network The TPID in an Ethernet frame has...

Страница 187: ...face view the setting is effective on the current port only configured in port group view the setting is effective on all ports in the port group Enable the basic QinQ function for the Ethernet port o...

Страница 188: ...ort adds to frames qinq ethernet type hex value Optional 0x8100 by default Caution z Perform the above configuration on ports of devices in the service provider network with customer networks connecte...

Страница 189: ...asic QinQ function on Ethernet 1 1 2 Sysname Ethernet1 1 2 qinq enable Sysname Ethernet1 1 2 quit Configure Ethernet 1 1 4 as a trunk port and configure the port to permit frames of VLAN 10 Sysname in...

Страница 190: ...runk port and configure the port to permit frames of VLAN 10 Sysname interface ethernet 1 1 4 Sysname Ethernet1 1 4 port link type trunk Sysname Ethernet1 1 4 port trunk permit vlan 10 Set the TPID va...

Страница 191: ...e of Contents Chapter 1 BPDU Tunneling Configuration 1 1 1 1 Introduction to BPDU Tunneling 1 1 1 1 1 Why BPDU Tunneling 1 1 1 1 2 How BPDU Tunneling Works 1 1 1 2 Configuring BPDU Isolation 1 3 1 3 C...

Страница 192: ...roblem It has the following functions z It can isolate BPDUs of different customer networks so that one network is not affected by others while calculating the topological structure z It enables BPDUs...

Страница 193: ...t is processed in the service provider network as follows z At the input side of the service provider network the edge device changes the destination MAC address of a BPDU from a customer network from...

Страница 194: ...command Configured in Ethernet interface view the setting is effective on the current port only configured in port group view the setting is effective on all ports in the port group Enable BPDU tunnel...

Страница 195: ...ote z BPDU tunneling must be enabled globally before the BPDU tunneling configuration for a port can take effect z The BPDU tunneling feature is incompatible with the GVRP feature so these two feature...

Страница 196: ...on Ethernet 1 1 1 Sysname system view Sysname vlan 2 Sysname vlan2 quit Sysname interface ethernet 1 1 1 Sysname Ethernet1 1 1 port access vlan 2 Sysname Ethernet1 1 1 stp disable Sysname Ethernet1 1...

Страница 197: ...ame Ethernet1 1 3 stp disable Sysname Ethernet1 1 3 bpdu tunnel dot1q enable Sysname Ethernet1 1 3 bpdu tunnel dot1q stp Configure BPDU transparent transmission on Ethernet 1 4 Sysname Ethernet1 1 3 q...

Страница 198: ...to Port Isolation 1 1 1 2 Configuring an Isolation Group 1 3 1 2 1 Assigning Ports to an Isolation Group 1 3 1 2 2 Configuring the Uplink Port of an Isolation Group 1 4 1 3 Displaying and Maintaining...

Страница 199: ...traffic of all the isolated ports can pass through the uplink port In addition to forward traffic from the uplink port to an isolated port you must ensure that the uplink port carries the VLAN to whi...

Страница 200: ...outing Switches Chapter 1 Port Isolation Configuration 1 2 Figure 1 1 Layer 2 communication between ports in different VLANs when port isolation is used For ports belonging to the same VLAN Layer 2 co...

Страница 201: ...ansmission direction of layer 2 traffic z As shown in the above figure in a VLAN ports outside isolation groups can access isolated ports but not vice versa 1 2 Configuring an Isolation Group 1 2 1 As...

Страница 202: ...ion Group Follow these steps to configure the uplink port of an isolation group To do Use the command Remarks Enter system view system view Enter Ethernet interface view interface interface type inter...

Страница 203: ...Host C can access the Internet while being isolated from one another at Layer 2 1 4 2 Networking Diagram Internet Host A Host B Host C Eth1 1 3 Eth1 1 2 Eth1 1 4 Eth1 1 1 Switch Figure 1 3 Networking...

Страница 204: ...late enable group 2 Configure port Ethernet1 1 1 as the uplink port of isolation group 2 Sysname Ethernet1 1 4 interface ethernet 1 1 1 Sysname Ethernet1 1 1 port isolate uplink port group 2 Sysname E...

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