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Implementing BFD
Configuring Allowable Delays for BFD State Change Notifications Using Timers on a Bundle
The BFD system supports two configurable timers to allow for delays in receipt of BFD SCNs from peers
before declaring a BFD session on a link bundle member down:
• BFD session startup
• BFD configuration removal by a neighbor
For more information about how these timers work and other BFD state change behavior, see the
of BFD State Change Behavior on Member Links and Bundle
To configure the timers that allow for delays in receipt of BFD SCNs from peers, complete these steps:
SUMMARY STEPS
1. configure
2. interface Bundle-Ether | Bundle-POS] bundle-id
3. bfd address-family ipv4 timers start seconds
4. bfd address-family ipv4 timers nbr-unconfig seconds
5. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
interface Bundle-Ether | Bundle-POS] bundle-id
Example:
RP/0/RP0/CPU0:router(config)# interface
Bundle-Ether 1
Step 3
bfd address-family ipv4 timers start seconds
Example:
RP/0/RP0/CPU0:router(config-if)#
Step 4
bfd address-family ipv4 timers nbr-unconfig seconds
Example:
RP/0/RP0/CPU0:router(config-if)#
Step 5
commit
Configuring Allowable Delays for BFD State Change Notifications Using Timers on a Bundle
Purpose
Enters interface configuration mode for the specified bundle
ID.
Specifies the number of seconds after startup of a BFD
member link session to wait for the expected notification
from the BFD peer to be received, so that the session can
be declared up. If the SCN is not received after that period
of time, the BFD session is declared down. The range is 60
to 3600.
Specifies the number of seconds to wait after receipt of
notification that BFD configuration has been removed by
a BFD neighbor, so that any configuration inconsistency
between the BFD peers can be fixed. If the BFD
configuration issue is not resolved before the specified timer
is reached, the BFD session is declared down. The range is
30 to 3600.
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
Status.
Overview
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