Dell EMC SmartFabric OS10 User Guide Release 10.5.1

Configure BFD globally

Before you configure BFD for static routing or a routing protocol, configure BFD globally on each router, including the global BFD session settings. BFD is disabled by default.

1. Configure the global BFD session parameters in CONFIGURATION mode.

   bfd interval milliseconds min_rx milliseconds multiplier number role {active | passive}

   • interval milliseconds — Enter the time interval for sending control packets to BFD peers, from 50 to 1000. The default is 200. Dell EMC recommends using more than 100 milliseconds.
   • min_rx milliseconds — Enter the maximum waiting time for receiving control packets from BFD peers, from 50 to 1000. The default is 200. Dell EMC recommends using more than 100 milliseconds.
   • multiplier number — Enter the number of consecutive packets that must not be received from a BFD peer before the session state changes to Down, from 3 to 50. The default is 3.
   • role {active | passive} — Enter active if the router initiates BFD sessions. Both BFD peers can be active at the same time. Enter passive if the router does not initiate BFD sessions, and only responds to a request from an active BFD to initialize a session. The default is active.
2. Enable BFD globally in CONFIGURATION mode.

   bfd enable

To verify that BFD is globally enabled, use the show running-config bfd command.

BFD global configuration

OS10(config)# bfd interval 250 min_rx 300 multiplier 4 role passive
OS10(config)# bfd enable
OS10(config)# do show running-config bfd
!
bfd enable
bfd interval 250 min_rx 300 multiplier 4 role passive

View information about active BFD neighbors

OS10#show bfd neighbors active
* - Active session role
-------------------------------------------------------------------------------------------
  LocalAddr        RemoteAddr      Interface        State RxInt TxInt Mult VRF     Clients
-------------------------------------------------------------------------------------------
* 100.100.1.1      100.100.1.2     ethernet1/1/26:1 up    200   200   3    red     ospfv2
* 100.100.3.1      100.100.3.2     ethernet1/1/26:3 up    200   200   3    default ospfv2
* 200.1.1.2        200.1.1.1       vlan102          up    200   200   3    black   bgp
* 200.1.5.2        200.1.5.1       vlan105          up    200   200   3    default ospfv2
* 200.1.11.2       200.1.11.1      vlan111          up    200   200   3    green   rtmv4
* 200.1.12.2       200.1.12.1      vlan112          up    200   200   3    default rtmv4
* 201.1.1.2        201.1.1.1       vlan101          up    200   200   3    green   ospfv2