Cisco ASR 9000 Series

When multiple applications share the same BFD session, the application with the most
aggressive timer wins locally. Then, the result is negotiated with the peer router.
Note
•
BFD is supported for connections over the following interface types:
◦
Gigabit Ethernet (GigE)
◦
Ten Gigabit Ethernet (TenGigE)
◦
Packet-over-SONET/SDH (POS)
◦
Serial
◦
Virtual LAN (VLAN)
◦
Bridge Group Virtual Interface (BVI)
◦
Satellite Interface
◦
Logical interfaces such as bundles, GRE, PWHE
BFD is supported on the above interface types and not on logical interfaces unless
specifically stated.
Note
•
Cisco IOS XR software supports BFD Version 0 and Version 1. BFD sessions are established using
either version, depending upon the neighbor. BFD Version 1 is the default version and is tried initially
for session creation.
Enabling BFD on a Static Route
The following procedure describes how to enable BFD on a static route.
Bundle VLAN sessions are restricted to an interval of 250 milliseconds and a multiplier of 3. More
aggressive parameters are not allowed.
Note
SUMMARY STEPS
1.
configure
2.
router static
3.
address-family ipv4 unicast address nexthop bfd fast-detect [minimum-interval interval] [multiplier
multiplier]
4.
vrf vrf-name
5.
address-family ipv4 unicast address nexthop bfd fast-detect
6.
commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
241
Implementing BFD
BFD for IPv4