Reference Guide

176 | Bidirectional Forwarding Detection (BFD)
www.dell.com | support.dell.com
To disable all VRRP sessions in a particular VRRP group:
To disable a particular VRRP session:
Configuring BFD for VLANs
Configuring BFD for VLANs is supported on the S5000 platform.
BFD on Dell Networking systems is a Layer 3 protocol. Therefore, BFD is used with routed VLANs. BFD
on VLANs 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. Therefore, the 100 total possible sessions that this
agent can maintain is shared for VLANs and port-channels.
Configuring BFD for VLANs is a two-step process:
1. Enabling BFD globally.
2. Establishing sessions with VLAN neighbors.
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.
Step Task Command Syntax Command Mode
1 Disable all VRRP sessions in a VRRP group. bfd disable VRRP
Step Task Command Syntax Command Mode
1 Disable a particular VRRP session on an interface. no vrrp bfd neighbor
ip-address
INTERFACE