White Papers

Table Of Contents
6. Enable BFD over OSPF.
VLT_Primary(conf)# router ospf 1
VLT_Primary(conf-router_ospf)# network 100.1.1.0/24 area 0
VLT_Primary(conf-router_ospf)# bfd all-neighbors
VLT Secondary
1. Enable BFD globally.
VLT_Secondary(conf)# bfd enable
2. Configure port channel which is used as VLTi link.
VLT_Secondary(conf)# interface port-channel 100
VLT_Secondary(conf-if-po-100)# no ip address
VLT_Secondary(conf-if-po-100)# channel-member tengigabitethernet 1/1/1, 1/1/2
VLT_Secondary(conf-if-po-100)# no shutdown
3. Enable VLT and configure a VLT domain.
VLT_Secondary(conf)# vlt domain 100
VLT_Secondary(conf-vlt-domain)# peer-link port-channel 100
VLT_Secondary(conf-vlt-domain)# back-up destination 10.16.206.80
VLT_Secondary(conf-vlt-domain)# peer-routing
4. Configure a VLT peer LAG.
VLT_Primary(conf)#interface tengigabitethernet 1/1/3
VLT_Primary(conf-if-te-1/1/3)#no ip address
VLT_Primary(conf-if-te-1/1/3)#port-channel-protocol lacp
VLT_Primary(conf-if-te-1/1/3)#port-channel 10 mode active
VLT_Primary(conf-if-te-1/1/3)#no shutdown
VLT_Primary(conf)#interface port-channel 10
VLT_Primary(conf-if-po-10)#no ip address
VLT_Primary(conf-if-po-10)#switchport
VLT_Primary(conf-if-po-10)#vlt-peer-lag port-channel 10
VLT_Primary(conf-if-po-10)#no shutdown
5. Configure a VLAN
VLT_Secondary(conf)#interface vlan 100
VLT_Secondary(conf-if-vl-100)#ip address 100.1.1.2/24
VLT_Secondary(conf-if-vl-100)#tagged port-channel 10
VLT_Secondary(conf-if-vl-100)#no shutdown
VLT_Secondary(conf-if-vl-100)#exit
6. Enable BFD over OSPF.
VLT_Secondary(conf)# router ospf 1
VLT_Secondary(conf-router_ospf)# network 100.1.1.0/24 area 0
VLT_Secondary(conf-router_ospf)# bfd all-neighbors
Verify the BFD configuration in each node using the following show commands:
To verify the BFD neighbors in the ToR, use show bfd neighbors command.
TOR#show bfd neighbors
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 100.1.1.3 100.1.1.1 Vl 100 Up 200 200 3 O
* 100.1.1.3 100.1.1.2 Vl 100 Up 200 200 3 O
996
Virtual Link Trunking (VLT)