Configuring OSPFv3 BFD

Information About OSPFv3 for BFD

The Bidirectional Forwarding Detection (BFD) protocol supports Open Shortest Path First version 3 (OSPFv3).

How to Configure OSPFv3 for BFD

Configuring BFD Support for OSPFv3

This section describes the procedures for configuring BFD support for OSPFv3, so that OSPFv3 is a registered protocol with BFD and will receive forwarding path detection failure messages from BFD. You can either configure BFD support for OSPFv3 globally on all interfaces or configure it selectively on one or more interfaces.

There are two methods for enabling BFD support for OSPFv3:

  • You can enable BFD for all of the interfaces for which OSPFv3 is routing by using the bfd all-interfaces command in router configuration mode. You can disable BFD support on individual interfaces using the ipv6 ospf bfd disable command in interface configuration mode.

  • You can enable BFD for a subset of the interfaces for which OSPFv3 is routing by using the ipv6 ospf bfd command in interface configuration mode.


Note

OSPF will only initiate BFD sessions for OSPF neighbors that are in the FULL state.

Configuring Baseline BFD Session Parameters on the Interface

Repeat this task for each interface over which you want to run BFD sessions to BFD neighbors.

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. interface type number
  4. bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier

DETAILED STEPS

  Command or Action Purpose

Step 1

enable

Example:

Device> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 3

interface type number

Example:

Device(config)# interface GigabitEthernet 0/0/0

Specifies an interface type and number, and places the device in interface configuration mode.

Step 4

bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier

Example:

Device(config-if)# bfd interval 50 min_rx 50 multiplier 5

Enables BFD on the interface.

Configuring BFD Support for OSPFv3 for All Interfaces

Before you begin

OSPFv3 must be running on all participating devices. The baseline parameters for BFD sessions on the interfaces over which you want to run BFD sessions to BFD neighbors must be configured.

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. ipv6 router ospf process-id [vrf vpn-name ]
  4. bfd all-interfaces
  5. exit
  6. show bfd neighbors [vrf vrf-name ] [client {bgp | eigrp | isis | ospf | rsvp | te-frr }] [ip-address | ipv6 ipv6-address ] [details ]
  7. show ipv6 ospf [process-id ] [area-id ] [rate-limit ]

DETAILED STEPS

  Command or Action Purpose

Step 1

enable

Example:

Device> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 3

ipv6 router ospf process-id [vrf vpn-name ]

Example:

Device(config)# ipv6 router ospf 2

Configures an OSPFv3 routing process.

Step 4

bfd all-interfaces

Example:

Device(config-router)# bfd all-interfaces

Enables BFD for all interfaces participating in the routing process.

Step 5

exit

Example:

Device(config-router)# exit

Enter this command twice to go to privileged EXEC mode.

Step 6

show bfd neighbors [vrf vrf-name ] [client {bgp | eigrp | isis | ospf | rsvp | te-frr }] [ip-address | ipv6 ipv6-address ] [details ]

Example:

Device# show bfd neighbors detail

(Optional) Displays a line-by-line listing of existing BFD adjacencies.

Step 7

show ipv6 ospf [process-id ] [area-id ] [rate-limit ]

Example:

Device# show ipv6 ospf

(Optional) Displays general information about OSPFv3 routing processes.

Configuring OSPF Support for BFD over IPv4 for One or More Interfaces

To configure BFD on one or more OSPF interfaces, perform the steps in this section.

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. interface type number
  4. ip ospf bfd [disable ]
  5. end
  6. show bfd neighbors [details ]
  7. show ip ospf

DETAILED STEPS

  Command or Action Purpose

Step 1

enable

Example:

Device>enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configure terminal

Example:

Device#configure terminal

Enters global configuration mode.

Step 3

interface type number

Example:

Device(config)#interface fastethernet 6/0

Enters interface configuration mode.

Step 4

ip ospf bfd [disable ]

Example:

Device(config-if)#ip ospf bfd

Enables or disables BFD on a per-interface basis for one or more interfaces that are associated with the OSPF routing process.

Note

 

Use the disable keyword only if you enable BFD on all the interfaces that OSPF is associated with using the bfd all-interfaces command in router configuration mode.

Step 5

end

Example:

Device(config-if)#end

Exits interface configuration mode and returns the device to privileged EXEC mode.

Step 6

show bfd neighbors [details ]

Example:

Device#show bfd neighbors details

(Optional) Displays information that can help verify if the BFD neighbor is active and displays the routing protocols that BFD has registered.

Note

 

If hardware-offloaded BFD sessions are configured with Tx and Rx intervals that are not multiples of 50 ms, the hardware intervals are changed. However, output from the show bfd neighbors details command displays only the configured intervals, not the interval values that change.

Step 7

show ip ospf

Example:

Device#show ip ospf

(Optional) Displays information that can help verify if BFD support for OSPF has been enabled.

Retrieving BFDv6 Information for Monitoring and Troubleshooting

SUMMARY STEPS

  1. enable
  2. monitor event ipv6 static [enable | disable ]
  3. show ipv6 static [ipv6-address | ipv6-prefix/prefix-length ] [interface type number | recursive ] [vrf vrf-name ] [bfd ] [detail
  4. show ipv6 static [ipv6-address | ipv6-prefix/prefix-length ] [interface type number | recursive ] [vrf vrf-name ] [bfd ] [detail ]
  5. debug ipv6 static

DETAILED STEPS

  Command or Action Purpose

Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

monitor event ipv6 static [enable | disable ]

Example:


Device# monitor event ipv6 static enable

Enables the use of event trace to monitor the operation of the IPv6 static and IPv6 static BFDv6 neighbors.

Step 3

show ipv6 static [ipv6-address | ipv6-prefix/prefix-length ] [interface type number | recursive ] [vrf vrf-name ] [bfd ] [detail

Example:


Device# show ipv6 static vrf vrf1 detail

Displays the BFDv6 status for a static route associated with a static BFDv6 neighbor.

Step 4

show ipv6 static [ipv6-address | ipv6-prefix/prefix-length ] [interface type number | recursive ] [vrf vrf-name ] [bfd ] [detail ]

Example:


Device# show ipv6 static vrf vrf1 bfd

Displays static BFDv6 neighbors and associated static routes.

Step 5

debug ipv6 static

Example:


Device# debug ipv6 static

Enables BFDv6 debugging.

Example: Displaying OSPF Interface Information about BFD

The following display shows that the OSPF interface is enabled for BFD: 


Device# show ipv6 ospf interface 

Serial10/0 is up, line protocol is up 
  Link Local Address FE80::A8BB:CCFF:FE00:6500, Interface ID 42 
  Area 1, Process ID 1, Instance ID 0, Router ID 10.0.0.1 
  Network Type POINT_TO_POINT, Cost: 64 
  Transmit Delay is 1 sec, State POINT_TO_POINT, BFD enabled 
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 
    Hello due in 00:00:07 
  Index 1/1/1, flood queue length 0 
  Next 0x0(0)/0x0(0)/0x0(0) 
  Last flood scan length is 1, maximum is 1 
  Last flood scan time is 0 msec, maximum is 0 msec 
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.1.0.1
  Suppress hello for 0 neighbor(s)

Additional References

Related Documents

Related Topic

Document Title

OSPFv3 for BFD

Bidirectional Forwarding Detection module

Standards and RFCs

Standard/RFC

Title

RFCs for IPv6

IPv6 RFCs

Feature History for OSPFv3 for BFD

This table provides release and related information for the features explained in this module.

These features are available in all the releases subsequent to the one they were introduced in, unless noted otherwise.

Release

Feature

Feature Information

Cisco IOS XE Gibraltar 16.11.1

OSPFv3 BFD

The Bidirectional Forwarding Detection (BFD) protocol supports Open Shortest Path First version 3 (OSPFv3).

Use the Cisco Feature Navigator to find information about platform and software image support. To access Cisco Feature Navigator, go to https://cfnng.cisco.com/.