Cisco Nexus 5600 Series NX-OS Unicast Routing Command Reference

Book Contents

Preface
- A Commands
- B Commands
- C Commands
- E Commands
- F Commands
- H Commands
- I Commands
- L Commands
- M Commands
- N Commands
- P Commands
- R Commands
- S Commands
- Show Commands
- T Commands
- V Commands
- A Commands
- C Commands
- D Commands
- E Commands
- F Commands
- I Commands
- L Commands
- M Commands
- R Commands
- S Commands
- Show Commands
- T Commands
- A Commands
- C Commands
- D Commands
- F Commands
- H Commands
- I Commands
- L Commands
- M Commands
- P Commands
- R Commands
- S Commands
- Show Commands
- T Commands
- V Commands

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Cisco Nexus 5600 Series NX-OS Unicast Routing Command Reference

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F Commands

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Updated:: October 30, 2017

F Commands

This chapter describes the Cisco NX-OS Open Shortest Path First (OSPF) commands that begin with F.

feature ospf

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

feature ospf

no feature ospf

Syntax Description

This command has no arguments or keywords.

Command Default

Disabled

Command Modes

Global configuration mode

Command History

Release	Modification
6.0(2)N1(1)	This command was introduced.

Usage Guidelines

You must enable the OSPF feature before you can configure OSPF.

This command requires the LAN Base Services license.

Examples

This example shows how to enable the OSPF feature:

switch# configure terminal

switch(config)# feature ospf

switch(config)#

This example shows how to disable the OSPF feature:

switch# configure terminal

switch(config)# no feature ospf

switch(config)#

Related Commands

Command	Description
router ospf	Creates an OSPF instance.
show feature	Displays the status of features on a switch.
show ospf	Displays OSPF configuration information.

flush-routes (OSPF)

To flush routes on a restart for the Open Shortest Path First (OSPF) protocol, use the flush-routes command. To disable this feature, use the no form of this command.

flush-routes

no flush-routes

Syntax Description

This command has no arguments or keywords.

Command Default

Disabled

Command Modes

Router configuration mode

Command History

Release	Modification
6.0(2)N1(1)	This command was introduced.

Usage Guidelines

This command causes OSPF to unregister from the unicast RIB when OSPF shuts down. The unicast RIB removes all the routes associated with this OSPF instance. If you do not configure the flush-routes command, OSPF does not unregister and the OSPF routes will be stale. The OSPF routes are eventually removed from the unicast RIB after a timeout period.

This command requires the LAN Base Services license.

Examples

This example shows how to flush routes for an OSPF restart:

switch# configure terminal

switch(config)# router ospf 202

switch(config-router)# flush-routes

switch(config-router)#

Related Commands

Command	Description
show ip ospf	Displays OSPF information.

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Cisco Nexus 5600 Series NX-OS Unicast Routing Command Reference

Results

Chapter: F Commands

F Commands

feature ospf

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Examples

Related Commands

flush-routes (OSPF)

Syntax Description

Command Default

Command Modes

Command History

Usage Guidelines

Examples

Related Commands

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