3Com LANPLEX 2500 EXTENDEDPLEX 2500 EXTENDED User Manual Download

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LAN

PLEX

2500 E

XTENDED

WITCHING

SER

UIDE

Part No. 801-00343-000
Published November 1996
Revision 02

Summary of Contents for LANPLEX 2500 EXTENDEDPLEX 2500 EXTENDED

Page 1: ...LANPLEX 2500 EXTENDED SWITCHING USER GUIDE Part No 801 00343 000 Published November 1996 Revision 02...

Page 2: ...Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii for restricted Rights in Technical Data and Computer Software cl...

Page 3: ...g 1 1 Using Menus 1 2 Bridge Menu 1 3 IP Menu 1 4 IPX Menu 1 5 Appletalk Menu 1 6 PART II VIRTUAL LAN TECHNOLOGY 2 VLANS ON THE LANPLEX SYSTEM About VLANs 2 1 Types of VLANs 2 1 Port Group VLANs 2 1 M...

Page 4: ...Routing Models 3 4 Traditional Bridging and Routing Model 3 4 LANplex Bridging and Routing Model 3 6 4 ROUTING WITH IP TECHNOLOGY IP Routing and the OSI Model 4 1 Elements of IP Routing 4 2 IP Addres...

Page 5: ...ironment 6 1 Internet Packet Exchange IPX 6 2 Routing Information Protocol RIP 6 3 Service Advertising Protocol SAP 6 3 How IPX Routing Works 6 4 IPX Packet Format 6 4 IPX Packet Delivery 6 6 Sending...

Page 6: ...WITCHING FEATURES 8 ADMINISTERING VLANS Displaying VLAN Information 8 1 Defining VLAN Information 8 3 Modifying VLAN Information 8 4 Removing VLAN Information 8 5 9 ADMINISTERING IP ROUTING Administer...

Page 7: ...Forwarding Address 9 19 Removing a Port or an IP Forwarding Address 9 19 Setting the BOOTP Hop Count Limit 9 20 Setting the BOOTP Relay Threshold 9 20 Enabling and Disabling IP Routing 9 20 Enabling...

Page 8: ...tting IPX Forwarding 11 11 Setting the RIP Mode 11 11 Setting the Enhanced RIP Mode 11 12 Setting the SAP Mode 11 13 Displaying Statistics 11 14 Displaying IPX Summary Statistics 11 14 Displaying IPX...

Page 9: ...at Is RMON 13 1 Benefits of RMON 13 2 LANplex RMON Implementation 13 2 3Com Transcend RMON Agents 13 3 Management Information Base MIB 13 4 MIB Objects 13 4 Alarms 13 6 Setting Alarm Thresholds 13 7 E...

Page 10: ...Support from 3Com A 4 Returning Products for Repair A 4 INDEX...

Page 11: ...on This guide is intended for the system or network administrator who is responsible for configuring using and managing the LANplex 2500 system It assumes a working knowledge of local area network LAN...

Page 12: ...P mulitcast routing Chapter 10 How to administer IPX routing Chapter 11 How to administer AppleTalk routing Chapter 12 Remote Monitoring RMON Chapter 13 3Com Technical Support Appendix A If you are lo...

Page 13: ...e the syntax and supply the appropriate value for example Set the date by using the following syntax mm DD yy hh mm ss xm Command indicates that all variables in the command syntax form have been supp...

Page 14: ...ANplex 2500 Administration Console User Guide Provides information about using the Administration Console to configure and manage your LANplex system Shipped with system Part No 801 00322 000 LANplex...

Page 15: ...ents Your suggestions are very important to us and will help make our documentation more useful to you Please email comments about this document to 3Com at sdtechpubs_comments 3Mail 3Com com Please in...

Page 16: ...6 ABOUT THIS GUIDE...

Page 17: ...software in addition to Virtual LANs VLANs Internet Protocol IP Routing an enhanced version of IP from the standard system software IP multicast routing Classical IP routing over Asynchronous Transfe...

Page 18: ...s ip Administer IP ipx Administer IPX appletalk Administer Appletalk snmp Administer SNMP analyzer Administer Roving Analysis script Run a script of console commands logout Logout of the Administratio...

Page 19: ...gure 1 1 Bridge Menu Hierarchy Top Level Menu bridge menu interface menu system display summary ethernet mode detail fddi ipFragmentation define atm ipxSnapTranslation modify bridge addressThreshold r...

Page 20: ...example enter ip at the top level menu interface at the ip menu and then define at the interface menu Figure 1 2 IP Menu Hierarchy Top Level Menu ip menu interface menu system interface summary ethern...

Page 21: ...enu For example to define a new IPX interface enter ipx at the top level menu interface at the ipx menu and then define at the interface menu Figure 1 3 IPX Menu Hierarchy Top Level Menu ipx menu inte...

Page 22: ...etalk menu For example to define a new AppleTalk interface you would enter appletalk at the top level menu interface at the AppleTalk menu then define at the interface menu Figure 1 4 Appletalk Menu H...

Page 23: ...cast domains to optimize network performance and create firewalls Form flexible user groups independent of the users physical network location Types of VLANs You can use several types of VLANs to grou...

Page 24: ...nted VLANS Using the LANplex filtering capability application specific traffic such as telnet traffic or FTP traffic can be filtered based on higher layer information You create this application orien...

Page 25: ...d application oriented VLANs always take precedence over protocol sensitive VLANs LANplex Protocol Sensitive VLAN Configuration The LANplex protocol sensitive VLAN configuration includes three element...

Page 26: ...pports configuring of individual IP VLANs with network layer subnet addresses With this additional layer 3 information you can create independent IP VLANs that share the same switch ports for multiple...

Page 27: ...initial default VLAN to form two or more subsets of switch ports If you remove the default VLAN and no other VLANs are defined for the system no flooding of traffic can occur How the LANplex System M...

Page 28: ...es the flooding domain for that data This case is called VLAN exception flooding This example shows how the VLAN exception flooding decision is made assuming an 18 port switch Index VLAN Ports 1 Defau...

Page 29: ...wo IP VLANs can be configured for ports 1 10 as follows IP VLAN 1 Subnet 158 101 112 0 ports 1 10 IP VLAN 2 Subnet 158 101 113 0 ports 1 10 This example shows how flooding decisions are made using ove...

Page 30: ...a routing interface you must first create a VLAN for that protocol and then associate it with that interface For example to create an IP interface that can route through a VLAN 1 Create an IP VLAN fo...

Page 31: ...ith subnet mask of 255 255 255 0 IP host interface address 157 103 54 254 with subnet mask of 255 255 255 0 Layer 2 bridging communication is still possible within an IP VLAN or router interface for t...

Page 32: ...orts with traffic segregated by protocol They are only aggregated over the high speed FDDI link See Figure 2 1 Example of a Protocol Sensitive VLAN Configuration IPX 1 VLAN 3 IP 1 VLAN 1 IP 2 Server I...

Page 33: ...clients share the same switch ports yet the IP and IPX traffic stays separate See Figure 2 2 Figure 2 2 A VLAN Configuration with Servers on Separate 100BASE T ports Power Run Process Power Fan Temp C...

Page 34: ...2 12 CHAPTER 2 VLANS ON THE LANPLEX SYSTEM...

Page 35: ...ss of distributing packets over potentially dissimilar networks A router also called a gateway is the machine that accomplishes this task Routers are typically used to Connect enterprise networks toge...

Page 36: ...Nplex system into such a network the system streamlines your network architecture and easily switches traffic between and within subnets over Ethernet and FDDI See Figure 3 2 Figure 3 2 Subnetted Arch...

Page 37: ...term MAC address refers to a physical hardware address The term network address refers to a logical address that applies to a specific protocol Figure 3 3 Multiple Ports per Subnets with the LANplex 2...

Page 38: ...hically on the LANplex system routing over bridging When a packet enters the system the system first tries to bridge the packet If the packet s destination network address is not on the same subnet th...

Page 39: ...t belongs to a recognized routing protocol so the packet is passed to the router 3 The router examines the destination network address and forwards the packet to the interface port connected to the de...

Page 40: ...om one subnet to the other In this case the host transmits the packet to the connecting router s MAC address In the LANplex bridging routing model a packet is bridged as follows see Figure 3 6 1 The p...

Page 41: ...erface associated with the port on which the packet was received 4 The routing layer a Selects a destination interface based on the destination network address b Determines the MAC address of the next...

Page 42: ...3 8 CHAPTER 3 BRIDGING AND ROUTING IN THE LANPLEX SYSTEM...

Page 43: ...IP over ATM IP Routing and the OSI Model An IP router unlike a bridge operates at the network layer of the OSI Reference Model That is it routes packets by examining the network layer address IP addre...

Page 44: ...packets in a subnetworking environment IP addresses Router interfaces Routing tables Address Resolution Protocol ARP IP Addresses IP addresses are 32 bit addresses composed of a network part the addre...

Page 45: ...he class of an IP address is designated in the high order bits of the network parts of the address Subnet Part of an IP Address In some environments the IP address contains a subnet part Subnetting al...

Page 46: ...he LANplex system s IP routing model more than one port can be connected to the same subnet Each router interface has an IP address and a subnet mask This address defines both the number of the networ...

Page 47: ...forward the packet toward its destination The routing table consists of the following elements Destination IP Address the destination network subnet or host Subnet Mask the subnet mask corresponding...

Page 48: ...reasonably stable routes Dynamic Routes Using RIP Automated methods of configuring routes help you keep up with a changing network environment allowing routes to be reconfigured quickly and reliably I...

Page 49: ...RP ARP is a low level protocol used to locate the MAC address correspond ing to a given IP address This protocol allows a host or router to make its routing decisions using IP addresses while it uses...

Page 50: ...dress this device places its MAC address in the target hardware address field and sends the packet back to the source hardware address When the originating host or router receives the ARP reply it pla...

Page 51: ...sends an ICMP echo request to a specified destination If the destination receives the echo request it sends an ICMP echo reply back to the original sender This process tests whether the destination is...

Page 52: ...ervers An ATM ARP server maintains a table of IP addresses and their corresponding ATM addresses and circuit information To forward IP packets over an ATM interface the network node learns the ATM add...

Page 53: ...and all subsequent packets to the destination address The sending node adds this VC to its ATM ARP cache IP Routing References Comer Douglas E Internetworking with TCP IP Volume I Principles Protocol...

Page 54: ...4 12 CHAPTER 4 ROUTING WITH IP TECHNOLOGY...

Page 55: ...st support within the LANplex system has two main components Internet Group Management Protocol IGMP Distance Vector Multicast Routing Protocol DVMRP This chapter describes these two protocols as well...

Page 56: ...tion to a multicast router The MBONE The MBONE is an experimental Multicast Backbone network that exists on the Internet Users can test multicast applications and technology on the MBONE without waiti...

Page 57: ...e discards it The flooding algorithm is useful in situations where the most important requirement for the network is robustness It does not depend on any kind of routing tables Destinations will recei...

Page 58: ...to avoid duplicate paths on multi access links It uses a routing table to compute a logical spanning tree for each network source The RPF algorithm has these basic steps 1 When the system receives a...

Page 59: ...The message tells the router to send no further packets to this group In the LANplex system the Administration Console IP multicast CacheDisplay includes information about when pruning will occur on t...

Page 60: ...between two multicast routers through one or more unicast routers The multicast router at the local endpoint of the tunnel encapsulates multicast packets in a format that unicast routers can interpret...

Page 61: ...k System XNS TM a networking system developed by Xerox Corporation The NetWare operating system is based on a client server architecture where clients request certain services from servers such as fil...

Page 62: ...st be provided by protocols above IPX IPX defines internetwork and intranode addressing schemes IPX internetwork addressing is based on network numbers that are assigned to each interface in an IPX ne...

Page 63: ...ging network service information Through SAP servers advertise their services and addresses Routers gather this information and share it with other routers This strategy allows routers to dynamically...

Page 64: ...es the information included in an IPX packet that helps it get delivered and then it describes the IPX packet delivery process IPX Packet Format The IPX packet format consists of two parts a 30 byte h...

Page 65: ...s information Destination Network This 4 byte field provides the destination node s network number When a sending node sets this field to zero the destination node is assumed to be on the same local s...

Page 66: ...the same network number the sending node can simply address and send packets directly to the destination node However if the sending and receiving nodes have different network numbers the sending node...

Page 67: ...er is directly connected the router performs the following tasks Places the destination node address from the IPX header in the destination address field of the MAC header Places its own node address...

Page 68: ...ess serves two functions It is used when sending IPX packets to or from the router itself It defines the network number of the segment connected to that interface Routing Tables A routing table holds...

Page 69: ...uses RIP to exchange information with other routers Routes are recalculated at regular intervals Static Routes A static route is one you manually configure in the routing table Static routes are usefu...

Page 70: ...o a network when choosing between alternate routes Select the route that requires the lowest number of ticks If multiple routes exist with an equal number of ticks select the route that also has the l...

Page 71: ...of a certain type on the internetwork A response to a workstation or a router request Periodic broadcasts by servers and routers Changed server information broadcasts Figure 6 5 provides an overview...

Page 72: ...twork Network Address This 4 byte field contains the server s network address Node Address This 6 byte field contains the server s node address Socket Address This 2 byte field contains the socket num...

Page 73: ...rovides the following information Interface Indicates from which interface the information was received Server Name The name of the server Server Type Indicates the type of service provided Network Ad...

Page 74: ...agents store this information in the server information table Clients can then use the table to contact the nearest router or file server SAP agent for server information Server Information Maintenan...

Page 75: ...internetwork SAP Request Handling When a SAP agent receives a general request it sends the sending source a SAP response packet containing information about all servers of any type known to the receiv...

Page 76: ...6 16 CHAPTER 6 ROUTING WITH IPX...

Page 77: ...ether to provide file sharing and printer sharing as well as applications like electronic mail and database access All Macintosh computers have AppleTalk connectivity options built into them making it...

Page 78: ...range such as 15 through 20 This numbering scheme allows for as many as 16 580 608 nodes although the actual cables will not support this many nodes AppleTalk Nodes A node in a AppleTalk network is a...

Page 79: ...internet Administration Accounting and Marketing Network 20 40 includes two nodes in the Administration zone and five nodes in the Accounting zone Network 47 47 includes a node from the Accounting zon...

Page 80: ...sole A nonseed router listens for a seed router and then takes the configuration information from the first seed router it detects After a nonseed router obtains the configuration information it can p...

Page 81: ...ovides the interface between the network hardware and the upper layers of the protocol stack The AppleTalk data link layer includes three link access protocols LAPs TokenTalk LAP TLAP Ethernet LAP ELA...

Page 82: ...connected networks can exchange packets with each other End to End Services The transport layer and the session layer provide end to end services in the AppleTalk network These services ensure that ro...

Page 83: ...k The routing table contains an entry for each network that a datagram can reach within 15 hops of the router The table is aged at set intervals as follows 1 After a period of time the RTMP changes th...

Page 84: ...o the datagram to the sending node This protocol can determine whether a node is accessible before any sessions are started and it can enable users to estimate the round trip delay time between two no...

Page 85: ...k Data Stream Protocol ADSP AppleTalk Session Layer Protocol ASP Printer Access Protocol PAP The Zone Information Protocol ZIP ZIP works with RTMP to maintain a table that maps network numbers to netw...

Page 86: ...n of the job Like other protocols at the session layer PAP relies on NBP to find the addresses of named entities PAP also depends on ATP for sending data Presentation Layer The presentation layer main...

Page 87: ...re addresses and their corresponding AARP addresses If an address is not in this table AARP sends a request to the protocol address and adds the hardware address to the table when the destination node...

Page 88: ...7 12 CHAPTER 7 ROUTING IN AN APPLETALK ENVIRONMENT...

Page 89: ...nets The detailed VLAN report includes the summary information plus additional utilization statistics From the top level of the Administration Console enter bridge vlan summary or bridge vlan detail T...

Page 90: ...Packets inBytes outPackets outBytes 1 342 3676 322 2987 2 125 7654 118 6897 3 345 7554 289 7431 4 876 8651 765 7969 Table 8 1 describes these statistics Table 8 1 Fields for VLAN Information Field Des...

Page 91: ...1 Enter defined to use layer 3 subnet addressing and continue with steps 2 and 3 OR enter undefined to not use layer 3 addressing 2 Enter the IP subnet address 3 Enter the subnet mask Field Descriptio...

Page 92: ...ation that defines the VLAN Press the Return or Enter key to accept any value that appears in brackets 2 Enter the number of the VLAN interface index 3 Enter the protocol suite for that VLAN IP IPX Ap...

Page 93: ...n Follow these steps to remove a VLAN definition 1 From the top level of the Administration Console enter bridge vlan remove 2 Enter the indexes for the VLANs you want to remove Example Select menu op...

Page 94: ...8 6 CHAPTER 8 ADMINISTERING VLANS...

Page 95: ...ocol RIP Ping IP statistics Administering interfaces You can define two types of IP interfaces through LANplex Extended Switching software IP VLAN interfaces and IP LIS interfaces This section describ...

Page 96: ...the subnet number and the host number Each IP address bit corresponding to a 1 in the subnet mask is in the network subnet part of the address Each IP address bit corresponding to a 0 is in the host p...

Page 97: ...r the minimum holding time has expired You also need to enter the ATM port number for this interface If you define only PVCs on the interface you need to enter only the PVC numbers and the ATM port nu...

Page 98: ...VLAN Index 1 VLAN 158 101 1 1 255 255 255 0 1 Down 2 2 LIS 158 101 112 1 255 255 255 0 1 Up 1 Index Type IP address Subnet mask Cost State Port IP forwarding is enabled RIP is active ICMP discovery is...

Page 99: ...g time and the ATM port associated with the interface You can also accept the defaults for these values For a LIS interface with only PVCs enter the ATM port and the PVCs associated with the interface...

Page 100: ...ost value of the interface 5 Enter the type of IP interface VLAN 6 Enter the advertisement address for this interface 7 Enter the index of the VLAN associated with the interface Example Enter IP addre...

Page 101: ...remove an IP interface definition 1 From the top level of the Administration Console enter ip interface remove 2 Enter the index numbers of the interfaces you want to remove If you have defined one o...

Page 102: ...ted with the interface To remove an advertisement address 1 From the top level of the Administration Console enter ip interface removeAdvertisement 2 Enter the index interface number and the advertise...

Page 103: ...hosts You can make static entries in this table using the Administration Console or configure the system to use RIP to exchange routing information automatically Each routing table entry contains the...

Page 104: ...dresses match the route s IP address and subnet mask The system forwards such packets to the indicated gateway Status For each interface the route provides the status information in Table 9 1 In addit...

Page 105: ...least one IP interface Static routes remain in the table until you remove them or the corresponding interface Static routes take precedence over dynamically learned routes to the same destination Sta...

Page 106: ...kets that do not match any other routing table entry A system can learn a default route using RIP or you can configure a default route statically If a system s routing table does not contain a default...

Page 107: ...system uses the Address Resolution Protocol ARP to find the MAC addresses corresponding to the IP addresses of hosts and routers on the same subnets An ARP cache is a table of known IP addresses and...

Page 108: ...Menu system ethernet fddi atm bridge ip ipx appletalk snmp analyzer script logout interface route arp atmArpServer multicast udpHelper routing icmpRouterDiscovery rip ping statistic s display remove f...

Page 109: ...inister the ATM ARP cache Displaying ATM ARP Servers To display a list of ATM ARP servers from the top level of the Administration Console enter ip atmArpServer display Example Top Level Menu system e...

Page 110: ...oving an ATM ARP Server To delete a currently defined ATM ARP server from the top level of the Administration Console enter ip atmArpServer remove The systems prompts you for one or more index numbers...

Page 111: ...ce route arp atmArpServer multicast udpHelper routing icmpRouterDiscovery rip ping statistics display define remove arp display remove flush IP routing is enabled RIP is active ICMP router discovery i...

Page 112: ...port you can boot hosts through the router UDP Helper also provides a relay agent for DHCP broadcasts UDP packets that rely on the BOOTP relay agent are modified and then forwarded through the router...

Page 113: ...a Port or an IP Forwarding Address You can remove a port number or IP forwarding address defined for UDP Helper To remove a port number or IP forwarding address 1 From the top level of the Administrat...

Page 114: ...her hosts When you enable IP routing the switching module acts as a normal IP router forwarding IP packets from one subnet to another when required When you disable IP routing the system discards any...

Page 115: ...her you can configure it to work with this protocol To enable ICMP Router Discovery from the top level of the Administration Console enter ip icmpRouterDiscovery Enter the ICMP Router Discovery mode e...

Page 116: ...chable A network is unreachable when there is no route to that network To ping an IP station 1 From the top level of the Administration Console enter ip ping 2 Enter the IP address of the station you...

Page 117: ...cmpRouterDiscovery rip ping statistics Table 9 2 IP Statistics Field Description inReceives Total number of IP datagrams received including those with errors forwDatagrams Number of datagrams that the...

Page 118: ...9 24 CHAPTER 9 ADMINISTERING IP ROUTING...

Page 119: ...is appendix includes information on how to display or configure the following parameters Enabling and disabling the Distance Vector Multicast Routing Protocol DVMRP Enabling and disabling the Internet...

Page 120: ...ng and Disabling IGMP IGMP enables a router or switch to determine whether group members exist in a subnetwork or leaf of the Spanning Tree It uses two search methods to make this determination Query...

Page 121: ...aracteristics on previously defined IP interfaces A multicast interface has three characteristics explained next DVMRP Metric Value The DVMRP metric value determines the cost of a multicast interface...

Page 122: ...e top level of the Administration Console enter ip multicast interface display 2 Enter the index numbers of the interfaces you want to display Example multicast interface configuration Top Level Menu...

Page 123: ...ast interface enable 2 Enter the index number s of the interface s you want to enable 3 Enter the DVMRP metric value of the chosen interface s 4 Enter the Time To Live TTL threshold of the chosen inte...

Page 124: ...e a tunnel The only configurations that require a tunnel are those that require a connection between two multicast internetworks through one or more unicast routers Displaying Multicast Tunnels To dis...

Page 125: ...40 Enter tunnel DVMRP metric 1 1 Enter tunnel TTL threshold 1 Enter tunnel rate limit 0 Removing a Multicast Tunnel To remove an IP multicast tunnel 1 From the top level of the Administration Console...

Page 126: ...heDisplay Multicast Routing Table 2598 entries Origin Subnet From Gateway Metric Tmr In If Out Ifs 157 88 29 1 32 137 39 229 98 18 25 T1 I1 137 39 2 254 32 137 39 229 98 5 25 T1 I1 131 215 125 236 32...

Page 127: ...play Field Description Origin Subnet The source address and the number of bits in the subnetwork From Gateway The interface address of the gateway Metric The hop count Tmr The amount of time in second...

Page 128: ...3 packets 128 138 213 24 224 2 0 1 3m 2h 2m T1P I1p 128 138 213 1 23 packets 128 206 212 24 224 2 0 1 92s 36m 60s T1P I1p 128 206 212 69 8 packets 131 136 234 24 224 2 0 1 3m 57m 3m T1P I1p 131 136 23...

Page 129: ...cast group CTmr Cache timer The amount of time in seconds s minutes m and hours h that a cache entry has to remain in the cache Age Number of seconds s minutes m or hours h that the cache entry has ex...

Page 130: ...10 12 CHAPTER 10 ADMINISTERING IP MULTICAST ROUTING...

Page 131: ...change IPX protocol to route packets For more information about how IPX works see Part III of this Guide You can display and configure the following on your LANplex system IPX interfaces Routes Server...

Page 132: ...redundant paths you should assign a cost of 1 to each interface Encapsulation format IPX routing uses four Ethernet encapsulation formats and two FDDI encapsulation formats The Ethernet encapsulation...

Page 133: ...face 1 From the Administration Console top level menu enter ipx interface define You are prompted for the interface s parameters To use the value in brackets press Return at the prompt 2 Enter the IPX...

Page 134: ...orts associated with the interface To remove an IPX interface definition 1 From the Administration Console top level menu enter ipx interface remove 2 Enter the index number s of the interface s you w...

Page 135: ...known to the router Hops The number of routers that must be crossed to reach the network segment The maximum number of routers a packet can cross is 15 Exception An IPX NetBIOS packet can cross no mo...

Page 136: ...ke precedence over dynamically learned routes to the same destination You can set up to 16 static routes To define a static route 1 From the Administration Console top level menu enter ipx route stati...

Page 137: ...learned routes from the Administration Console top level menu enter ipx route flush All learned routes are immediately deleted from the routing table Enter IPX address 0x45469f30 Enter Cost 1 Enter In...

Page 138: ...Console Each server table contains the following information Name The user defined name of the server Type The type of service provided by the server Node The 6 byte address of the server that can for...

Page 139: ...ne a static server 1 From the Administration Console top level menu enter ipx server static 2 Enter the interface number of the server 3 Enter the service type of the server 4 Enter the service name o...

Page 140: ...Administration Console top level menu enter ipx server flush All learned servers are immediately deleted from the server table Enter Interface number 1 Enter service type 4 Enter service name gb201 E...

Page 141: ...2 Enter the IPX forwarding state enabled or disabled To use the value in brackets press Return at the prompt Setting the RIP Mode You can select a RIP mode that is appropriate for your network RIP can...

Page 142: ...mode allows the system greater interoperability with routers that do not explicitly follow the IPX router implementation guidelines Enhanced RIP default By default enhanced RIP is disabled To enable o...

Page 143: ...espond to SAP requests Active The system processes all incoming SAP packets responds to explicit requests for routing information and broadcasts periodic and triggered SAP updates SAP default mode By...

Page 144: ...mary statistics Top Level Menu system ethernet fddi atm bridge ip ipx appletalk snmp analyzer script logout interface route server forwarding rip enhanced sap statistics summary rip sap forwarding IPX...

Page 145: ...cs summary rip sap forwarding IPX forwarding is enabled RIP is active SAP is active RIP Received RIP Transmitted RIP dropped 106195 7929 0 RIP Responses RIP Requests RIP Entries 100552 5643 2 Table 11...

Page 146: ...P Transmitted SAP dropped 1064015 22493 0 SAP Responses SAP Requests SAP Entries 1063532 45 0 SAP GNS Responses SAP GNS Requests 0 438 Table 11 3 IPX SAP Statistics Field Description SAP Received Numb...

Page 147: ...evel Menu system ethernet fddi atm bridge ip ipx appletalk snmp analyzer script logout interface route server forwarding rip enhanced sap statistics summary rip sap forwarding IPX forwarding is enable...

Page 148: ...maximum transport control Addr Errors Number of IPX packet dropped due to IPX Address errors in network layer header No Routes Number of IPX packets dropped because the IPX route is unknown Misc Error...

Page 149: ...the AppleTalk protocol to route packets For more information on how AppleTalk routing works see Chapter 7 Routing with AppleTalk You can display and configure the following AppleTalk interfaces Route...

Page 150: ...n seed interfaces wait and listen for a seed interface and then take this configuration initialization information from the first seed interface they detect After the non seed interface obtains a netw...

Page 151: ...parameters To use the value in brackets press Return at the prompt The following message appears Configure seed interface n y y 2 Enter n no or y yes 3 Enter the start of the network range associated...

Page 152: ...remove an AppleTalk interface 1 At the Administration Console s top level menu enter appletalk interface remove 2 Enter the index number s of the interface s you want to remove The interface is no lon...

Page 153: ...Range A range of numbers used to designate a network segment s identity Distance The distance in hops to the destination network Interface The defined interface number State The status good suspect b...

Page 154: ...1 10 1 good 3 4 1 good 10 14 6 1 good 15 19 7 1 good 61 6 1 good 100 100 10 1 good 201 300 7 1 good 2010 2015 2 1 good 10009 10009 5 1 good 10010 10010 7 1 good 10060 10060 8 1 good 10110 10113 5 1 go...

Page 155: ...AMT AARP sends a request to the desired protocol address and the hardware address is added to the table when the destination node replies AARP is also responsible for registering a node s dynamically...

Page 156: ...89 01 8b 51 1 18 20112 1 08 00 02 04 80 b6 1 31 20125 193 08 00 07 d7 69 1f 3 388 20125 76 08 00 07 66 62 9d 3 862 20125 67 08 00 07 ee 10 a2 3 851 20124 41 08 00 07 7c c3 d8 2 864 20112 225 00 20 af...

Page 157: ...To flush all AARP cache entries 1 At the Administration Console s top level menu enter appletalk aarp flush Top Level Menu system ethernet fddi atm bridge ip ipx appletalk snmp analyzer script logout...

Page 158: ...tes and maintains a Zone Information Table ZIT in each router The entries in this table match the network numbers with the zone names In the Administration Console you can display the zone table eithe...

Page 159: ...5 Zone Manchester UK is assigned to 1 network 10310 10329 Zone DC8 is assigned to 1 network 30110 30129 Zone Chicago is assigned to 1 network 22030 22030 Zone Startek Enet1 is assigned to 1 network 20...

Page 160: ...tion prompt Pinging an AppleTalk Node The AppleTalk Echo Protocol AEP sends a datagram an Echo Request from one node to another which causes the destination node to return or echo the datagram an Echo...

Page 161: ...snmp analyzer script logout interface route aarp zone forwarding checksum ping statistics ddp rtmp zip nbp DDP forwarding is enabled inReceives inForwards inLocals inNoRoutes 131131 113171 17906 22 i...

Page 162: ...heir type was short DDP inCsumErrors Number of DDP datagrams which were dropped because of a checksum error inBcastErrors Number of DDP datagrams for which this DDP entity was their final destination...

Page 163: ...articular network routeLessChgs Number of times RTMP changes the Next Internet Router in a routing entry because the hop count advertised in a routing table was less than the current hop count for a p...

Page 164: ...ZIP GetNetInfo request packets received inGniReplies Number of ZIP GetNetInfo reply packets received inLocalZones Number of Zip GetLocalZones requests packets received inZoneLists Number of Zip GetZo...

Page 165: ...neInvs Number of times this entity has sent a ZIP GetNetInfo reply with the zone invalid bit set in response to a GetNetInfo request with an invalid zone name outAddrInvs Number of times this entity h...

Page 166: ...NBP Statistics Field Description inLkupReqs Number of NBP Lookup Requests received inBcastsReqs Number of NBP Broadcast Requests received inFwdReqs Number of NBP Forward Requests received inLkupReplie...

Page 167: ...V Chapter 13 Remote Monitoring RMON Technology REMOTE MONITORING RMON AND THE LANPLEX SYSTEM...

Page 168: ...ing historical data in its local memory The Management Console Communicates with the probe and collects the summarized data from it The console does not need to reside on the same network as the probe...

Page 169: ...RMON MIB reports by exception rather than by sending constant or frequent information to the network management console The RMON probe informs the network management console directly if the network en...

Page 170: ...and then takes action based on these statistics For example the system can generate a log event and send an RMON trap if errors on a port exceed a user set threshold You must assign an IP address to t...

Page 171: ...network device without a specific description of that device 3Com ships SNMP MIB files with LANplex Extended Switching System software as ASN 1 files MIB Objects The data in the MIB consists of object...

Page 172: ...not appear in the display You do not need to know the contents of every MIB object to manage a network Most network management applications including Transcend Enterprise Manager Software make the MI...

Page 173: ...ive you misleading results Counters are not infinite which makes rate comparisons an efficient way to use them When counters reach a predetermined limit they return to 0 roll over A single low counter...

Page 174: ...tors the counters and thresholds continually during normal operations to provide data for later calibration Example of an Alarm Threshold Figure 13 3 shows a counter with thresholds set manually Figur...

Page 175: ...An alarm does not occur if the value has not fallen below the low threshold before rising above the high threshold The counter value exceeds the low threshold after previously exceeding the high thres...

Page 176: ...VI Appendix A Technical Support APPENDIX...

Page 177: ...as well as technical articles This service is available via analog modem or ISDN 24 hours a day seven days a week Access by Analog Modem To reach the service by modem set your modem to 8 data bits no...

Page 178: ...3Com com This service features news and information about 3Com products customer service and support 3Com s latest news releases selected articles from 3TECH journal 3Com s award winning technical jo...

Page 179: ...planning installation hardware maintenance application training and support services When you contact your network supplier for assistance have the following information ready Diagnostic error messag...

Page 180: ...to the sender unopened at the sender s expense To obtain an RMA number call or fax 10 22 96 Country Telephone Number Country Telephone Number Australia 1800 678 515 Japan 81 3 3345 7251 Mexico 525 53...

Page 181: ...n menu 1 6 name binding protocol NBP 7 9 network layer 7 6 nodes 7 2 physical layer 7 5 printer access protocol PAP 7 10 protocols about 7 1 protocols and OSI levels 7 4 routing table maintenance prot...

Page 182: ...xtended switching overview 1 1 F fax service See 3ComFacts flushing ARP cache 9 15 learned routes AppleTalk 12 6 learned routes IP 9 12 learned routes IPX 11 7 for 11 9 forwarding configuring AppleTal...

Page 183: ...st routing about 5 1 algorithms 5 3 interfaces 10 1 administering 10 3 defining 10 2 displaying 10 4 enabling 10 5 MBONE 5 2 rate limit 5 6 10 4 TTL threshold 10 3 tunnels 5 6 10 6 IP route default 9...

Page 184: ...AppleTalk 7 6 network numbers extended 7 2 nonextended 7 2 network supplier support A 3 nodes AppleTalk 7 2 nonextended network numbers 7 2 O on line technical services A 1 OSI Reference Model AppleTa...

Page 185: ...ute 9 12 static routes 4 6 routing table IPX contents 6 8 described 6 8 displaying 11 6 dynamic routes 6 9 example 6 9 flushing learned routes 11 7 removing a route 11 7 static routes 6 9 RTMP descrip...

Page 186: ...3 displaying 8 1 modifying 8 4 removing 8 5 VLAN interfaces about 9 1 characteristics of 9 2 defining 9 6 VLANs application oriented 2 2 MAC address group 2 2 overlapped IP 2 7 port group 2 1 protoco...

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