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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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To re-enable BFD on an interface:<br />

Step Task Command Syntax Command Mode<br />

1 Enable BFD on an interface. bfd enable INTERFACE<br />

Configuring BFD <strong>for</strong> Static Routes<br />

BFD gives systems a link state detection mechanism <strong>for</strong> static routes. With BFD, systems are notified to<br />

remove static routes from <strong>the</strong> routing table as soon as <strong>the</strong> link state change occurs, ra<strong>the</strong>r than having to<br />

wait until packets fail to reach <strong>the</strong>ir next hop.<br />

Configuring BFD <strong>for</strong> static routes is a three-step process:<br />

1. Enable BFD globally. See Enabling BFD globally on page 604.<br />

2. On <strong>the</strong> local system, establish a session with <strong>the</strong> next hop of a static route. See page 608.<br />

3. On <strong>the</strong> remote system, establish a session with <strong>the</strong> physical port that is <strong>the</strong> origin of <strong>the</strong> static route.<br />

See Establishing a session on physical ports on page 604.<br />

Related configuration tasks<br />

• Change session parameters. See page 609.<br />

• Disable BFD <strong>for</strong> all static routes. See page 609.<br />

Establishing sessions <strong>for</strong> static routes<br />

Sessions are established <strong>for</strong> all neighbors that are <strong>the</strong> next hop of a static route.<br />

Figure 427 Enabling BFD <strong>for</strong> Static Routes<br />

R1<br />

<strong>Force10</strong>(config)# interface gigabite<strong>the</strong>rnet 2/1<br />

<strong>Force10</strong>(conf-if-gi-2/1)# ip address 2.2.2.2/24<br />

<strong>Force10</strong>(conf-if-gi-2/1)# no shutdown<br />

<strong>Force10</strong>(conf-if-gi-2/1)# bfd neighbor 2.2.2.1<br />

<strong>Force10</strong>(config)# interface gigabite<strong>the</strong>rnet 2/2<br />

<strong>Force10</strong>(conf-if-gi-2/2)# ip address 2.2.3.1/24<br />

<strong>Force10</strong>(conf-if-gi-2/2)# no shutdown<br />

4/24 2/1 2/2 6/0<br />

2.2.2.1/24<br />

2.2.2.2/24<br />

2.2.3.1/24<br />

2.2.3.2/24<br />

<strong>Force10</strong>(config)# interface gigabite<strong>the</strong>rnet 4/24<br />

<strong>Force10</strong>(conf-if-gi-4/24)# ip address 2.2.2.1/24<br />

<strong>Force10</strong>(conf-if-gi-4/24)# no shutdown<br />

<strong>Force10</strong>(config)# ip route 2.2.3.0/24 2.2.2.2<br />

<strong>Force10</strong>(config)# ip route bfd<br />

<strong>Force10</strong>(config)# interface gigabite<strong>the</strong>rnet 6/0<br />

<strong>Force10</strong>(conf-if-gi-6/0)# ip address 2.2.3.2/24<br />

<strong>Force10</strong>(conf-if-gi-6/0)# no shutdown<br />

fnC0039mp<br />

608 Bidirectional Forwarding Detection<br />

R2<br />

R3

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