Connectivity Guide

• OS10 supports:
– 64 BFD sessions at 100 minimum transmit and receive intervals with a multiplier of 4
– 100 BFD sessions at 200 minimum transmit and receive intervals with a multiplier of 3
• OS10 does not support Demand mode, authentication, and Echo function.
• OS10 does not support BFD on multi-hop and virtual links.
• OS10 supports protocol liveness only for routing protocols.
• OS10 BFD supports only the BGP routing protocol. For IPv4 and IPv6 BGP, OS10 supports only the default virtual routing and
forwarding (VRF).
Congure BFD globally
Before you congure BFD for static routing or a routing protocol, congure BFD globally on each router, including the global BFD session
settings. BFD is disabled by default.
1 Congure 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 100 to 1000; default 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 100 to 1000;
default 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; default 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, enter the show running-config bfd command.
BFD global conguration
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
BFD for BGP
In a BGP core network, BFD enables faster network reconvergence. BFD rapidly detects communication failures in BGP fast-forwarding
paths between internal BGP (iBGP) and external BGP (eBGP) peers. BFD for BGP is supported on physical, port-channel, and VLAN
interfaces. BFD for BGP does not support the BGP multihop feature.
Before conguring BFD for BGP, rst congure BGP on the interconnecting routers. For more information, see Border Gateway Protocol.
Layer 3
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