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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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Configuring BFD <strong>for</strong> Physical Ports<br />

BFD on physical ports is useful when no routing protocol is enabled. Without BFD, if <strong>the</strong> remote system<br />

fails, <strong>the</strong> local system does not remove <strong>the</strong> connected route until <strong>the</strong> first failed attempt to send a packet.<br />

When BFD is enabled, <strong>the</strong> local system removes <strong>the</strong> route as soon as it stops receiving periodic control<br />

packets from <strong>the</strong> remote system.<br />

Configuring BFD <strong>for</strong> a physical port is a two-step process:<br />

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

2. Establish a session with a next-hop neighbor. See page 604.<br />

Related configuration tasks<br />

• Change session parameters. See page 606.<br />

• Disable or re-enable BFD on an interface. See page 607.<br />

Enabling BFD globally<br />

BFD must be enabled globally on both routers, as shown in Figure 423.<br />

To enable BFD globally:<br />

Step Task Command Syntax Command Mode<br />

1 Enable BFD globally. bfd enable CONFIGURATION<br />

Verify that BFD is enabled globally using <strong>the</strong> command show running bfd, as shown in Figure 422.<br />

Figure 422 Enabling BFD Globally<br />

R1(conf)#bfd ?<br />

enable Enable BFD protocol<br />

protocol-liveness Enable BFD protocol-liveness<br />

R1(conf)#bfd enable<br />

R1(conf)#do show running-config bfd<br />

!<br />

bfd enable<br />

R1(conf)#<br />

Establishing a session on physical ports<br />

BFD Enabled Globally<br />

To establish a session, BFD must be enabled at interface level on both ends of <strong>the</strong> link, as shown in<br />

Figure 423. The configuration parameters do not need to match.<br />

604 Bidirectional Forwarding Detection

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