F Commands
This chapter describes the Cisco NX-OS commands that begin with F that are used to manage a Cisco Nexus 2000 Series Fabric Extender from a Cisco Nexus 6000 switch.
fcoe
To associate a Cisco Nexus 2000 Series Fabric Extender (FEX) to a switch for pinning Fibre Channel over Ethernet (FCoE) Initialization Protocol (FIP) and FCoE traffic, use the fcoe command. To remove the association, use the no form of this command.
fcoe [vsan vsan-id]
no fcoe [vsan]
Syntax Description
vsan vsan-id |
Specifies the VSAN status. The VSAN ID range is from 1 to 4094. |
Command Default
None
Command Modes
FEX configuration mode
VLAN configuration mode
Command History
|
|
|
|---|---|
6.0(2)N1(1) |
This command was introduced. |
Usage Guidelines
Before you use this command, make sure that you enable the Fabric Extender (FEX) features on the switch by using the feature fex command.
You can use this command only on Cisco Nexus 2232P and Cisco Nexus 2232PQ Fabric Extenders. When you bind an interface to a virtual Fibre Channel interface to enable FCoE traffic, you must use slot number 1. The port number can be from 1 to 32.
Examples
This example shows how to configure a FEX as FCoE enabled:
switch# configure terminal
switch(config)# feature fex
switch(config)# fex 100
switch(config-fex)# fcoe
switch(config-fex)#
This example shows how to configure a pair of FEXs to carry FCoE traffic in a fabric virtual port channel (vPC) topology, with the host uplink ports in the FEXs configured to the same port channel:
switch# configure terminal
switch(config)# feature lacp
switch(config)# feature fex
switch(config)# feature fcoe
switch(config)# fex 100
switch(config-fex)# fcoe
switch(config-fex)# exit
switch(config)# interface vfc 1
switch(config-if)# bind interface eth101/1/1
switch(config)# interface eth101/1/1
switch(config-if)# channel-group 1
switch(config)# fex 102
switch(config-fex)# fcoe
switch(config)# interface vfc 1
switch(config-if)# bind interface eth102/1/1
switch(config)# interface eth102/1/1
switch(config-if)# channel-group 1
switch(config-if)#
This example shows how to configure FCoE traffic on a VLAN:
switch# configure terminal
switch(config)# vlan 5
switch(config-vlan)# fcoe vsan 1
switch(config-vlan)#
This example shows how to disable FCoE traffic on a FEX:
switch# configure terminal
switch(config)# fex 100
switch(config-fex)# no fcoe
switch(config-fex)#
Related Commands
feature fex
To enable Fabric Extender (FEX) features on the switch, use the feature fex command. To disable FEX, use the no form of this command.
feature fex
no feature fex
Syntax Description
This command has no arguments or keywords.
Command Default
None
Command Modes
Global configuration mode
Command History
|
|
|
|---|---|
6.0(2)N1(1) |
This command was introduced. |
Examples
This example shows how to enable FEX features on the switch:
switch(config)# feature fex
switch(config)#
Related Commands
|
|
|
|---|---|
fex |
Creates a Fabric Extender and enters fabric extender configuration mode. |
show feature |
Displays the features enabled or disabled on the switch. |
fex
To create a Fabric Extender and enter fabric extender configuration mode, use the fex command. To delete the Fabric Extender configuration, use the no form of this command.
fex chassis_ID
no fex chassis_ID
Syntax Description
chassis_ID |
Fabric Extender chassis ID. The chassis ID range is from 100 to 199. |
Command Default
None
Command Modes
Global configuration mode
Command History
|
|
|
6.0(2)N1(1) |
This command was introduced. |
Usage Guidelines
You can create and configure the Fabric Extender before you connect and associate it to an interface on the parent switch. Once you associate the Fabric Extender to the switch, the configuration you created is transferred over to the Fabric Extender and applied.
Examples
This example shows how to enter Fabric Extender configuration mode:
switch# configure terminal
switch(config)# fex 101
switch(config-fex)#
This example shows how to delete the Fabric Extender configuration:
switch(config-fex)# no fex 101
switch(config)#
Related Commands
fex associate
To associate a Fabric Extender to a fabric interface, use the fex associate command. To disassociate the Fabric Extender, use the no form of this command.
fex associate chassis_ID
no fex associate [chassis_ID]
Syntax Description
chassis_ID |
Fabric Extender chassis ID. The chassis ID range is from 100 to 199. |
Command Default
None
Command Modes
Interface configuration mode
Command History
|
|
|
6.0(2)N1(1) |
This command was introduced. |
Usage Guidelines
Before you can associate an interface on the parent switch to the Fabric Extender, you must first make the interface into a fabric interface by entering the switchport mode fex-fabric command.
Examples
This example shows how to associate the Fabric Extender to an Ethernet interface:
switch# configure terminal
switch(config)# interface ethernet 1/40
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 101
This example shows how to associate the Fabric Extender to an EtherChannel interface:
switch# configure terminal
switch(config)# interface port-channel 4
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 101
Related Commands
|
|
|
|---|---|
show fex |
Displays all configured Fabric Extender chassis connected to the switch. |
switchport mode fex-fabric |
Sets the interface to be an uplink port. |
fex pinning redistribute
To redistribute the host interfaces on a Fabric Extender, use the fex pinning redistribute command.
fex pinning redistribute chassis_ID
Syntax Description
chassis_ID |
Fabric Extender chassis ID. The chassis ID range is from 100 to 199. |
Command Default
None
Command Modes
EXEC mode
Command History
|
|
|
6.0(2)N1(1) |
This command was introduced. |
Usage Guidelines
When you provision the Fabric Extender using the statically pinned mode (see the Cisco Nexus 2000 Series Fabric Extender Software Configuration Guide), the host interfaces on the Fabric Extender are pinned to the fabric interfaces in the order that they were initially configured. The next time that you reboot the Fabric Extender, the configured fabric interfaces are pinned to the host interfaces in an ascending order by the port number of the fabric interface.
Use the fex pinning redistribute command if you want to configure the same fixed distribution of host interfaces without restarting the Fabric Extender after your initial configuration.
This command disrupts all the host interface ports of the Fabric Extender. However, the disruption is shorter than would be the case if you reboot the Fabric Extender.
Examples
This example shows how to redistribute the host interfaces on a Fabric Extender:
switch# fex pinning redistribute 101
switch#
Related Commands
fex queue-limit
To limit the amount of input buffer space (in bytes) allocated to each Fabric Extender port, use the fex queue-limit command. To disable the drop threshold and allow a Fabric Extender port to use all available buffer space, use the no form of this command.
fex queue-limit
no fex queue-limit
Syntax Description
This command has no arguments or keywords.
Command Default
Fabric Extender queue limit is available in the default configuration and is set on.
Command Modes
System QoS configuration mode
Command History
|
|
|
|---|---|
6.0(2)N1(1) |
This command was introduced. |
Usage Guidelines
By default, the drop threshold applies to each Fabric Extender port to limit the amount of buffer being allocated for each port. To restore the default queue limit of each Fabric Extender port, use the fex queue-limit command.
Examples
This example shows how to set the queue limit for the input buffer for each Fabric Extender port:
switch(config)# system qos
switch(config-sys-qos)# fex queue-limit
switch(config-sys-qos)#
This example shows how to restore the default queue limit for each Fabric Extender port:
switch(config)# system qos
switch(config-sys-qos)# no fex queue-limit
switch(config-sys-qos)#
Related Commands
|
|
|
|---|---|
show fex |
Displays all configured Fabric Extender chassis connected to the switch. |
Feedback