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Cisco Nexus 2000 Series, Configuration Manual

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Cisco Nexus 2000 Series Configuration Manual Download Page 27

Associating a Fabric Extender to a Port Channel

Before You Begin

Ensure that you have installed and enabled the Fabric Extender feature set.

Ensure that you are in the correct VDC (or use the

switchto vdc

command).

SUMMARY STEPS

1.

configure terminal

2.

interface port-channel channel

3.

switchport

4.

switchport mode fex-fabric

5.

fex associate FEX-number

6.

(Optional)

show interface port-channel channel fex-intf

DETAILED STEPS

Purpose

Command or Action

Enters configuration mode.

configure terminal

Example:

switch# configure terminal
switch(config)#

Step 1

Specifies a port channel to configure.

interface port-channel channel

Step 2

Example:

switch(config)# interface port-channel 4
switch(config-if)#

All interfaces in the port channel must be in the
same VDC.

Note

Sets the interface as a Layer 2 switching port.

switchport

Example:

switch(config-if)# switchport

Step 3

Sets the port channel to support an external Fabric
Extender.

switchport mode fex-fabric

Example:

switch(config-if)# switchport mode fex-fabric

Step 4

Associates a FEX number to the Fabric Extender unit
attached to the interface. The range is from 101 to 199.

fex associate FEX-number

Example:

switch(config-if)# fex associate 101

Step 5

(Optional)
Displays the association of a Fabric Extender to a port
channel interface.

show interface port-channel channel fex-intf

Example:

switch# show interface port-channel 4 fex-intf

Step 6

Cisco Nexus 2000 Series NX-OS Fabric Extender Software Configuration Guide    

   OL-25816-02

17

Configuring the Fabric Extender

Associating a Fabric Extender to a Fabric Interface

Summary of Contents for Nexus 2000 Series

Page 1: ...iguration Guide First Published May 03 2012 Last Modified August 22 2012 Americas Headquarters Cisco Systems Inc 170 West Tasman Drive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 Text Part Number OL 25816 02 ...

Page 2: ...PLIERS DISCLAIM ALL WARRANTIES EXPRESSED OR IMPLIED INCLUDING WITHOUT LIMITATION THOSE OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING USAGE OR TRADE PRACTICE IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION LOST PROFITS OR LOSS OR DAMAGE TO DATA A...

Page 3: ...tender Terminology 2 Fabric Interface Features 3 Host Interfaces 3 Layer 3 Host Interfaces 3 Layer 2 Host Interfaces 3 Host Interface Port Channels 4 Layer 3 Host Interface Port Channels 4 Layer 2 Host Interface Port Channels 4 VLANs 5 Protocol Offload 5 Quality of Service 5 Access Control Lists 5 IGMP Snooping 6 Switched Port Analyzer 6 Oversubscription 6 Management Model 7 Forwarding Model 8 Por...

Page 4: ...a Fabric Interface 16 Associating a Fabric Extender to a Port Channel 17 Disassociating a Fabric Extender From an Interface 19 Associating a Fabric Extender to an F2 Module 19 Configuring Fabric Extender Global Features 21 Configuration Examples 23 Configuring a FEX with a Layer 3 Host Interface 24 Configuring a Host Interface in a vPC Topology Connected to Two FEXs 24 Dual homing of a Server to a...

Page 5: ...e Request page ix Audience This publication is for experienced network administrators who configure and maintain Cisco Nexus Series devices Document Conventions Command descriptions use the following conventions Description Convention Bold text indicates the commands and keywords that you enter literally as shown bold Italic text indicates arguments for which the user supplies the values Italic Sq...

Page 6: ...ns and information the switch displays are in screen font screen font Information you must enter is in boldface screen font boldface screen font Arguments for which you supply values are in italic screen font italic screen font Nonprinting characters such as passwords are in angle brackets Default responses to system prompts are in square brackets An exclamation point or a pound sign at the beginn...

Page 7: ... 7000 Series NX OS Layer 2 Switching Configuration Guide Cisco Nexus 7000 Series NX OS LISP Configuration Guide Cisco Nexus 7000 Series NX OS MPLS Configuration Guide Cisco Nexus 7000 Series NX OS Multicast Routing Configuration Guide Cisco Nexus 7000 Series NX OS OTV Configuration Guide Cisco Nexus 7000 Series NX OS Quality of Service Configuration Guide Cisco Nexus 7000 Series NX OS SAN Switchin...

Page 8: ... 7000 Series NX OS Quality of Service Command Reference Cisco Nexus 7000 Series NX OS SAN Switching Command Reference Cisco Nexus 7000 Series NX OS Security Command Reference Cisco Nexus 7000 Series NX OS System Management Command Reference Cisco Nexus 7000 Series NX OS Unicast Routing Command Reference Cisco Nexus 7000 Series NX OS Virtual Device Context Command Reference Cisco NX OS FCoE Command...

Page 9: ...e monthly What s New in Cisco Product Documentation which also lists all new and revised Cisco technical documentation at http www cisco com en US docs general whatsnew whatsnew html Subscribe to the What s New in Cisco Product Documentation as a Really Simple Syndication RSS feed and set content to be delivered directly to your desktop using a reader application The RSS feeds are a free service a...

Page 10: ...Cisco Nexus 2000 Series NX OS Fabric Extender Software Configuration Guide x OL 25816 02 Preface Obtaining Documentation and Submitting a Service Request ...

Page 11: ...page 4 VLANs page 5 Protocol Offload page 5 Quality of Service page 5 Access Control Lists page 5 IGMP Snooping page 6 Switched Port Analyzer page 6 Oversubscription page 6 Management Model page 7 Forwarding Model page 8 Port Channel Fabric Interface Connection page 9 Port Numbering Convention page 9 Fabric Extender Image Management page 10 Licensing Requirements for the Fabric Extender page 10 Gu...

Page 12: ...ice You must connect the Fabric Extender to its parent Cisco Nexus 7000 Series device equipped with a 32 port 10 Gigabit M1 module N7K M132XP 12 a 32 port 10 Gigabit M1 XL module N7K M132XP 12L an M2 module or an F2 module Note No software is included with the Fabric Extender Software is automatically downloaded and upgraded from its parent device Fabric Extender Terminology Some terms used in thi...

Page 13: ...a Cisco Nexus 7000 Series parent switch run in Layer 3 mode If you have updated the parent switch to Cisco Nexus Release 5 2 previously configured Fabric Extender host interfaces retain their default port mode Layer 2 You can change these ports to Layer 3 mode with the no switchport command Note The host interfaces also support subinterfaces You can create up to 32 subinterfaces on a Fabric Extend...

Page 14: ...Port channel resources are allocated when the port channel has one or more members Note All members of the port channel must be Fabric Extender host interfaces and all host interfaces must be from the same Fabric Extender You cannot mix interfaces from the Fabric Extender and the parent switch Layer 3 mode is supported on host interface port channels A host interface port channel also supports sub...

Page 15: ...a Center Bridging Exchange DCBX Cisco Discovery Protocol CDP Link Aggregation Control Protocol LACP Quality of Service The Fabric Extender uses IEEE 802 1p class of service CoS values to associate traffic with the appropriate class Per port QoS configuration is also supported Host interfaces support pause frames which are implemented using IEEE 802 3x link level flow control LLC By default flow co...

Page 16: ...u might see a packet twice once as the packet ingresses on an interface with Rx configured and again as the packet egresses on an interface with Tx configured Note For more information about SPAN see the Cisco Nexus 7000 Series NX OS System Management Configuration Guide Oversubscription In a switching environment oversubscription is the practice of connecting multiple devices to the same interfac...

Page 17: ...2TM is 4 1 The Cisco Nexus 2224TP Fabric Extender has 2 10 Gigabit Ethernet fabric interfaces and 24 100 1000BASE T 100 Mb 1 Gigabit Ethernet host interfaces With this system you can configure a 1 2 to 1 oversubscription 24 host interfaces for 2 fabric interfaces or higher Management Model The Cisco Nexus 2000 Series Fabric Extender is managed by its parent switch over the fabric interfaces throug...

Page 18: ...rovides end host connectivity into the network fabric As a result BPDU Guard is enabled on all its host interfaces If you connect a bridge or switch to a host interface that interface is placed in an error disabled state when a BPDU is received You cannot disable BPDU Guard on the host interfaces of the Fabric Extender Note The Fabric Extender supports egress multicast replication from the network...

Page 19: ... source and destination MAC addresses and the source and destination IP addresses A fabric interface that fails in the port channel does not trigger a change to the host interfaces Traffic is automatically redistributed across the remaining links in the port channel fabric interface If all links in the fabric port channel go down all host interfaces on the FEX are set to the down state Note Port N...

Page 20: ...s online while the installation process loads its new software image Once the software image has successfully loaded the parent switch and the Fabric Extender both automatically reboot This process is required to maintain version compatibility between the parent switch and the Fabric Extender Licensing Requirements for the Fabric Extender The following table shows the licensing requirements for th...

Page 21: ...ed to an Layer 2 using SVI interfaces or Layer 3 FEX interface cannot participate in routing protocol adjacency The FEX cannot be used as a peer because when congestion occurs on the FEX host interface the control plane traffic is not prioritized This limitation also applies to the FEX when it is connected to other Layer 3 devices such as an ASA firewall an ACE load balancer or other Layer 3 netwo...

Page 22: ... Fabric Extender parameters Table 1 Default Cisco Nexus 2000 Series Fabric Extender Parameter Settings Default Parameters Disabled feature set fex command Layer 3 Cisco NX OS Release 5 2 and later releases Layer 2 Cisco NX OS Release 5 1 and earlier releases Port mode Cisco Nexus 2000 Series NX OS Fabric Extender Software Configuration Guide 12 OL 25816 02 Overview Configuration Limits ...

Page 23: ...how to configure the Fabric Extender Managing the Fabric Extender Feature Set You can install and manage the Fabric Extender feature set SUMMARY STEPS 1 Installing the Fabric Extender Feature Set on page 14 2 Enabling the Fabric Extender Feature Set on page 15 3 Optional Disallowing the Fabric Extender Feature Set on page 15 DETAILED STEPS Step 1 Installing the Fabric Extender Feature Set on page ...

Page 24: ...MARY STEPS 1 configure terminal 2 install feature set fex 3 exit DETAILED STEPS Purpose Command or Action Enters configuration mode configure terminal Example switch configure terminal switch config Step 1 Installs the Fabric Extender feature set in the default VDC install feature set fex Step 2 Example switch config install feature set fex To uninstall the Fabric Extender feature set use the no i...

Page 25: ...c Extender feature set use the no feature set fex command Before you can disable a feature set you must install the feature set in the default VDC The no feature set fex command might take some time to complete if the size of the configuration is very large The command cleans up all of the configurations associated with the Fabric Extender feature set Note Exits configuration mode exit Example swi...

Page 26: ...et in a specific VDC Subsequently you can change the status back to allowed with the allow feature set fex command Exits VDC configuration mode and returns to EXEC mode end Example switch config vdc end switch Step 4 Associating a Fabric Extender to a Fabric Interface A FEX is connected to its parent device through a port channel By default the parent device does not allow the attached Fabric Exte...

Page 27: ...itch config if All interfaces in the port channel must be in the same VDC Note Sets the interface as a Layer 2 switching port switchport Example switch config if switchport Step 3 Sets the port channel to support an external Fabric Extender switchport mode fex fabric Example switch config if switchport mode fex fabric Step 4 Associates a FEX number to the Fabric Extender unit attached to the inter...

Page 28: ...X on that link You must enter the shutdown command and the no shutdown command on the Ethernet interface not the port channel interface to clear the err disable state and bring the link up Note that this does not apply if the configuration is performed prior to cabling Tip When adding physical interfaces to port channels all configurations on the port channel and physical interface must match Note...

Page 29: ...erface or a port channel interface ethernet slot port port channel channel Example switch config interface port channel 4 switch config if Step 2 Disassociates the Fabric Extender unit attached to the interface no fex associate Example switch config if no fex associate Step 3 Associating a Fabric Extender to an F2 Module You can associate the Fabric Extender to an F2 module Before You Begin Ensure...

Page 30: ...ex sub set S such as 1 2 4 is allowed to be added to a port channel only if the port channel has an equivalent or an empty set SUMMARY STEPS 1 vdc switch 2 limit resource module type f2 3 interface ethernet mod number port range 4 allocate interface ethernet slot port 5 switchport mode fex fabric 6 fex associate FEX chassis number 7 channel group port channel number 8 no shutdown 9 int po port cha...

Page 31: ... fex associate FEX chassis number Example switch config if fex associate 101 Step 6 Specifies the port channel number channel group port channel number Example switch config if channel group 1 Step 7 Brings up port no shutdown Example switch config if no shutdown Step 8 Specifies the port channel int po port channel number Example switch config if int po 1 Step 9 Brings up the port channel no shut...

Page 32: ...tep 2 Optional Specifies the description The default is the string FEXxxxx where xxxx is the FEX number If the FEX number is 123 the description is FEX0123 description desc Example switch config fex description Rack7A N2K Step 3 Optional Deletes the description no description Example switch config fex no description Step 4 Optional Specifies the type of Fabric Extender FEX type is one of the follo...

Page 33: ...t switch all configurations for all interfaces on the Fabric Extender are deleted Optional Defines a serial number string If this command is configured a switch only allows the corresponding chassis ID to associate using the fex associate command if the Fabric Extender reports a matching serial number string serial serial Example switch config fex serial JAF1339BDSK Step 7 Configuring a serial num...

Page 34: ...nel group 12 no shutdown interface port channel 12 ip address 192 0 3 1 24 mtu 2000 no shutdown The VLAN used in the Layer 3 host interface HIF or host interface port channel HIFPC subinterface has only local significance to its parent interface The same VLAN ID can be reused between Layer 3 subinterfaces in the same switch or VDC Note Configuring a Host Interface in a vPC Topology Connected to Tw...

Page 35: ... fabricpath switch config if exit switch config 3 Configure the STP priority for all Rapid PVST VLANs as 8192 switch config terminal switch config spanning tree vlan 11 20 priority 8192 switch config 4 Configure the STP priority for all MST instances as 8192 switch config terminal switch config spanning tree mst 1 5 priority 8192 switch config 5 Optional Configure the STP domain ID on each FabricP...

Page 36: ... c In the VPC domain configuration mode configure the emulated switch ID with the fabricpath switchid switchid command 7 Copy the configuration switch config copy running config startup config switch config Verifying the Configuration This section describes how to display the configuration of the Fabric Extender and verify the chassis hardware status Verifying the Fabric Extender Configuration To ...

Page 37: ...tate Po101 Interface Up State Active Eth2 1 Interface Up State Active Eth2 2 Interface Up State Active Eth4 1 Interface Up State Active Eth4 2 Interface Up State Active Fex Port State Fabric Port Primary Fabric Eth101 1 1 Up Po101 Po101 Eth101 1 2 Up Po101 Po101 Eth101 1 3 Down Po101 Po101 Eth101 1 4 Down Po101 Po101 Eth101 1 5 Down Po101 Po101 Eth101 1 6 Down Po101 Po101 Eth101 1 7 Down Po101 Po1...

Page 38: ...rial 101 Eth2 1 Active 1 N2K C2248TP 1GE JAF1418AARL 101 Eth2 2 Active 2 N2K C2248TP 1GE JAF1418AARL 101 Eth4 1 Active 3 N2K C2248TP 1GE JAF1418AARL 101 Eth4 2 Active 4 N2K C2248TP 1GE JAF1418AARL This example shows how to display the SFP transceiver and diagnostic optical monitoring DOM information for Fabric Extender uplinks for an SFP transceiver that is plugged into the parent switch interface...

Page 39: ... number Displays module information about a Fabric Extender show module fex FEX number Displays the contents of the serial PROM SPROM on the Fabric Extender show sprom fex FEX number all backplane powersupply ps num all Configuration Examples for Chassis Management This example shows how to display the module information about all connected Fabric Extender units switch show module fex FEX Mod Port...

Page 40: ... FAN ok PS 1 absent PS 2 NXK PAC 400W ok Power Supply Fex 101 Voltage 12 Volts PS Model Power Power Status Watts Amp 1 2 NXK PAC 400W 4 32 0 36 ok Mod Model Power Power Power Power Status Requested Requested Allocated Allocated Watts Amp Watts Amp 1 N2K C2248TP 1GE 0 00 0 00 0 00 0 00 powered up Power Usage Summary Power Supply redundancy mode redundant Total Power Capacity 4 32 W Power reserved f...

Page 41: ...nsor 5 50 40 Sensor 6 128 128 Sensor 7 128 128 Sensor 8 128 128 Max Connector Power 4000 Cooling Requirement 65 Ambient Temperature 40 DISPLAY FEX 101 backplane sprom contents Common block Block Signature 0xabab Block Version 3 Block Length 160 Block Checksum 0x1947 EEPROM Size 65535 Block Count 5 FRU Major Type 0x6001 FRU Minor Type 0x0 OEM String Cisco Systems Inc Product Number N2K C2248TP 1GE ...

Page 42: ... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 License software module specific block Block Signature 0x6006 Block Version 1 Block Length 16 Block Checksum 0x86f lic usage bits ff ff ff ff ff ff ff ff DISPLAY FEX 101 power supp...

Page 43: ...nces available at the following URL http www cisco com en US products ps9402 prod_command_ reference_list html Command reference Feature History This table lists the release history for this feature Table 2 Feature History for the Cisco Nexus 2000 Series Fabric Extender Feature Information Releases Feature Name Support was added when the FEX is connected to the 48 port 100 1000BASE T 100 Mb 1 Giga...

Page 44: ...7000 Series device with the install feature set and feature set commands 5 1 1 Feature set commands Support was added for port channels and the integration of vPC on the host interfaces 5 2 1 Port channel and vPC support Layer 3 capability was added to the Fabric Extender host interface ports including IPv4 and IPv6 and IGMP snooping 5 2 1 Layer 3 support Cisco Nexus 2000 Series NX OS Fabric Exten...

Page 45: ...irements 10 limitations 10 fabric interface 2 fabric interface Port Channel 9 fail over load balancing 9 FEX number 9 G guidelines 10 H host interface 2 host interface autonegotiation 5 I IEEE 802 1p 5 IEEE 802 3x 5 IGMP snooping 6 image management 10 L LACP 5 layer 3 ports 3 licensing 10 fabric extender 10 limitations 10 Link Aggregation Control Protocol See LACP Link Layer Discovery Protocol See...

Page 46: ...ee QoS R related documents 33 S serial number 21 SFP validation 3 show diagnostics 29 show environment 29 show fex 26 show inventory 29 show modules 29 show SPROM 29 show transceiver status 26 SPAN restrictions 6 SPAN source ports 6 subinterfaces 3 switchport fex fabric mode 3 switchport saved configuration 3 T type 21 V version compatibility 10 VLANs 5 Cisco Nexus 2000 Series NX OS Fabric Extende...

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