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Bidirectional Forwarding Detection | 201
Configuring BFD for Port-Channels
BFD on port-channels is analogous to BFD on physical ports. If no routing protocol is enabled, and a
remote system fails, the local system does not remove the connected route until the first failed attempt to
send a packet. If BFD is enabled, the local system removes the route when it stops receiving periodic
control packets from the remote system.
There is one BFD Agent for VLANs and port-channels, which resides on RP2 as opposed to the other
agents which are on the line card. Therefore, the 100 total possible sessions that this agent can maintain is
shared for VLANs and port-channels.
Configuring BFD for port-channels is a two-step process:
1. Enable BFD globally on all participating routers. See Enabling BFD globally on page 176.
2. Enable BFD at interface level at both ends of the port-channel. See page 201.
Related configuration tasks
• Change session parameters. See page 202.
• Disable BFD a port-channel. See page 202.
Establishing sessions on port-channels
To establish a session, BFD must be enabled at interface level on both ends of the link, as shown in
Figure 9-5. The session parameters do not need to match.
Figure 9-27. Establishing Sessions on Port-Channels
fnC0044mp
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Force10(config-if-range-gi-4/24-5)# port-channel-protocol lacp
Force10(config-if-range-gi-4/24-5)# port-channel 1 mode active
Force10(config-if-range-gi-4/24-5)# no shutdown
Force10(config-if-range-gi-4/24-5)# interface port-channel 1
Force10(config-if-po-1)# ip address 2.2.2.1/24
Force10(config-if-po-1)# no shutdown
Force10(config-if-po-1)# bfd neighbor 2.2.2.2
2/1
2/1
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4
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Port Channel 1
24
4
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Force10(config-if-range-gi-2/1-2)# port-channel-protocol lacp
Force10(config-if-range-gi-2/1-2)# port-channel 1 mode active
Force10(config-if-range-gi-2/1-2)# no shutdown
Force10(config-if-range-gi-2/1-2)# interface port-channel 1
Force10(config-if-po-1)# ip address 2.2.2.2/24
Force10(config-if-po-1)# no shutdown
Force10(config-if-po-1)# bfd neighbor 2.2.2.1