F Commands

This chapter describes the Cisco NX-OS Multiprotocol Label Switching commands that begin with F.

fast-reroute (TE interface configuration mode)

To enable an Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnel to request a backup tunnel to protect against a link or node failure, use the fast-reroute command. To restore the system to its default condition, use the no form of this command.

fast-reroute [bw-protect] [node-protect]

no fast-reroute

 
Syntax Description

bw-protect

(Optional) Sets the bandwidth protection desired bit so that backup bandwidth protection is requested at each hop that the label switched path (LSP) traverses.

node-proteect

(Optional) Sets the node protection desired bit so that node protection is requested at each hop the LSP traverses.

 
Defaults

None

 
Command Modes

TE interface configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to specify bandwidth protection:

switch# configure terminal
switch(config)# interface tunnel-te 1000
switch(config-if-te)# fast-reroute bw-protect
switch(config-if-te)#
 

This example shows how to specify node protection:

switch# configure terminal
switch(config)# interface tunnel-te 1000
switch(config-if-te)# fast-reroute node-protect
switch(config-if-te)#
 
 
 

 
Related Commands

Command
Description

interface tunnel-te

Configures the traffic engineering (TE) interface.

fast-reroute backup-prot-preempt optimize-bw

To change the backup protection preemption algorithm from minimizing the number of label switched paths (LSPs) that are demoted to minimizing the amount of bandwidth that is wasted, use the fast-reroute backup-prot-preempt command.

fast-reroute backup-prot-preempt optimize-bw

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

A minimum number of LSPs are preempted

 
Command Modes

MPLS traffic engineering global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to change the backup protection preemption algorithm from minimizing the number of LSPs that are demoted to minimizing the amount of bandwidth that is wasted:

switch# configure terminal
switch(config)# mpls traffic-eng configuration
switch(config-te)# fast backup-prot-preempt optimize-bw
switch(config-te)#

 
Related Commands

Command
Description

mpls traffic-eng configuration

Configures the Multiprotocol Label Switching (MPLS) Traffic Engineering protocol (MPLS-TE).

fast-reroute timers promotion

To specify how often the router considers switched a label switching path (LSP) to a new (better) backup tunnel if additional backup bandwidth becomes available, use the fast-reroute timers promotion command. To restore the system to its default condition, use the no form of this command.

fast-reroute timers promotion sec

no fast-reroute timers promotion

 
Syntax Description

sec

(Optional) Sets the interval, in seconds, between scans to determine if an LSP should use a new, better backup tunnel. Valid values are from 0 to 604800. A value of 0 disables promotions to a better LSP.

 
Defaults

The timer is running and is set to a frequency of every 300 seconds (5 minutes)

 
Command Modes

TE configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to configure how often to scan for LSP backup promotion:

switch# configure terminal
switch(config)# mpls traffic-eng configuration
switch(config-te)# fast-reroute timer promotion 10
switch(config-te)#

 
Related Commands

Command
Description

mpls traffic-eng configuration

Configures the Multiprotocol Label Switching (MPLS) Traffic Engineering protocol (MPLS-TE).

feature bfd

To enable Bidirectional Forwarding Detection (BFD) on the router Multiprotocol Label Switching (MPLS) traffic engineering (TE) link and node protection, use the feature bfd command. To disable the system to its default condition, use the no form of this command.

feature bfd

no feature bfd

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

None

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable BFD on the device:

switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
switch(config)# feature bfd
Please disable the ICMP redirects on all interfaces
running BFD sessions using the command below
 
'no ip redirects '
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).

feature bgp

To enable the Border Gateway Protocol (BGP) feature, use the feature bgp command. To return to the default setting, use the no form of this command.

feature bgp

no feature bgp

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

None

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable BGP:

switch# configure terminal
switch(config)# feature bgp
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).

feature evc

To enable Ethernet virtual circuits (EVCs) on a Cisco NX-OS device, use the feature evc command. To disable EVC, use the no form of this command.

feature evc

no feature evc

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

None

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

6.2.2

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable EVC on the Cisco NX-OS device:

switch# configure terminal
switch(config)# feature evc
 

This example shows how to disable EVC on the Cisco NX-OS device:

switch(config)# no feature evc
switch(config)#

 
Related Commands

Command
Description

show feature

Displays the status of features on a device.

feature isis

To enable the Intermediate System-to-Intermediate System (IS-IS) feature, use the feature isis command. To return to the default setting, use the no form of this command.

feature isis

no feature isis

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Enable

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable the IS-IS feature:

switch(config-ldp)# configure terminal
switch(config)# feature isis
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).

feature mpls l3vpn

To enable the Multiprotocol Label Switching (MPLS) Layer 3 virtual private networks, use the feature mpls l3vpn command. To return to the default setting, use the no form of this command.

feature mpls l3vpn

no feature mpls l3vpn

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Per VDC

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable the MPLS Layer 3 virtual private networks:

switch# configure terminal
switch(config)# install feature-set mpls
switch(config)# feature-set mpls
switch(config)# feature mpls l3vpn

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).

feature mpls ldp

To enable the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP) feature on the device, use the feature mpls ldp command. To return to the default setting, use the no form of this command.

feature mpls ldp

no feature mpls ldp

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Per VDC

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

When you disable MPLS LDP on the device, no LDP commands are available.

This command requires the MPLS Services license.

Examples

This example shows how to enable IP over MPLS:

switch(config)# install feature-set mpls
switch(config)# feature-set mpls
switch(config)# feature mpls ldp
LAN_ENTERPRISE_SERVICES_PKG license not installed. ldp feature will be shut down
after grace period of approximately 115 day(s).
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).
 
 
 
 
 

feature mpls traffic-engineering

To enable Multiprotocol Label Switching (MPLS) traffic engineering (TE) on the device, use the feature mpls traffic-engineering command. To return to the default setting, use the no form of this command.

feature mpls traffic-engineering

no feature mpls traffic-engineering

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Per VDC

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

Unless you enable MPLS TE on the device, no TE commands are available.

The user has to enter feature command to enable TE.

This command requires the MPLS Services license.

Examples

This example shows how to enable MPLS TE:

switch(config)# install feature-set mpls
switch(config)# feature-set mpls
switch(config)# feature mpls traffic-engineering
switch(config)#

 
Related Commands

Command
Description

interface tunnel-te

Configures the traffic-engineering (TE) interface.

feature mvpn

To enable the Multiprotocol Label Switching (MPLS) multicast virtual private network (MVPN) feature on the device, use the feature mvpn command. To return to the default setting, use the no form of this command.

feature mvpn

no feature mvpn

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Enabled

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable MVPN feature on the device:

switch(config)# feature mvpn
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).
 

feature ospf

To enable the Open Shortest Path First (OSPF) feature, use the feature ospf command. To disable this feature, use the no form of this command.

feature ospf

no feature ospf

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Enable

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable information about the OSPF configuration:

switch(config)# feature ospf
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).
 

 

feature-set mpls

To enable the feature set Multiprotocol Label Switching (MPLS) information, use the feature-set mpls command. To disable this feature, use the no form of this command.

feature-set mpls

no feature-set mpls

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Per VDC

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to enable the MPLS feature set information:

switch(config)# feature-set mpls
switch(config)#

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).

forwarding-adjacency

To advertise a traffic engineering (TE) tunnel as a link in an Interior Gateway Protocol (IGP) network, use the forwarding-adjacency command. To return to the default setting, use the no form of this command.

forwarding-adjacency [holdtime value]

no forwarding-adjacency

 
Syntax Description

holdtime

(Optional) Specifies the time, in milliseconds, that a TE tunnel waits after going down before informing the network.

value

(Optional) Hold time. The range is from 0 to 4294967295.

 
Defaults

Default value is 0

 
Command Modes

TE tunnel configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to advertise the TE tunnel as a link in an IGP network:

switch# configure terminal
switch(config)# interface tunnel-te 1
switch(config-if-te)# forwarding-adjacency holdtime 1
switch(config-if-te)#

 
Related Commands

Command
Description

interface tunnel-te

Configures the traffic engineering (TE) interface.

from

To map the value from one number to another, use the from command.

from number to number

 
Syntax Description

number

Map number. The range is from 0 to 63.

 
Defaults

None

 
Command Modes

Table map configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

This command requires the MPLS Services license.

Examples

This example shows how to map the value from one number to another (you can repeat this command up to 64 times):

switch# configure terminal
switch(config)# table-map tablemap1
switch(config-tmap)# from 1 to 1
switch(config-tmap)# from 2 to 1
switch(config-tmap)# from 3 to 2
switch(config-tmap)# from 4 to 2
switch(config-tmap)# exit

 
Related Commands

Command
Description

mpls ldp configuration

Configures the Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP).