Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 186

www.dell.com | support.dell.com Configuring BFD for VLANs BFD on Dell Force10 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, 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 VLANs is a two-step process: 1. Enabling BFD globally. 2. Establishing sessions with VLAN neighbors. Related configuration tasks • Changing session parameters. • Disabling BFD for VLANs. 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 Figure 11-9. The session parameters do not need to match. Figure 11-9. Establishing Sessions with VLAN Neighbors R1 VLAN 200 4/25 2/3 FTOS(config-if-gi-4/25)# switchport FTOS(config-if-gi-4/25)# no shutdown FTOS(config-if-gi-4/25)# interface vlan 200 FTOS(config-if-vl-200)# ip address 2.2.3.1/24 FTOS(config-if-vl-200)# untagged gigabitethernet 4/25 FTOS(config-if-vl-200)# no shutdown FTOS(config-if-vl-200)# bfd neighbor 2.2.3.2 R2 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 fnC0043mp To establish a BFD session with a VLAN neighbor: Step 1 Task Establish sessions with a VLAN neighbor. Command Syntax bfd neighbor ip-address Command Mode INTERFACE VLAN 186 | Bidirectional Forwarding Detection