Dell Force10 S4810P - Configuring BFD for Port-Channels

Bidirectional Forwarding Detection (BFD) | 169
Related configuration tasks
• Establishing sessions with OSPF neighbors.
Establishing sessions with VLAN neighbors
To establish a session, BFD must be enabled at interface level on both ends of the link, as shown in the
illustration below. The session parameters do not need to match.
Disabling BFD for VLANs
If BFD is disabled on an interface, sessions on the interface are torn down. A final Admin Down control
packet is sent to all neighbors, and sessions on the remote system change to the Down state (Message 3).
To disable BFD on a VLAN interface:
Configuring BFD for Port-Channels
Configuring BFD for port-channels is supported on platforms: c e
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.
Step Task Command Syntax Command Mode
1 Disable all sessions on a VLAN interface. no bfd enable INTERFACE VLAN
fnC0043mp
F
TOS(config-if-gi-4/25)# switchport
F
TOS(config-if-gi-4/25)# no shutdown
F
TOS(config-if-gi-4/25)# interface vlan 200
F
TOS(config-if-vl-200)# ip address 2.2.3.1/24
F
TOS(config-if-vl-200)# untagged gigabitethernet 4/25
F
TOS(config-if-vl-200)# no shutdown
F
TOS(config-if-vl-200)# bfd neighbor 2.2.3.2
4/25 2/3
VLAN 200
FTOS(config-if-gi-2/3)# switchport
FTOS(config-if-gi-2/3)# no shutdown
FTOS(config-if-gi-2/3)# interface vlan 200
FTOS(config-if-vl-200)# ip address 2.2.3.2/24
FTOS(config-if-vl-200)# untagged gigabitethernet 2/3
FTOS(config-if-vl-200)# no shutdown
FTOS(config-if-vl-200)# bfd neighbor 2.2.3.2
R1
R2