Bundle - Cisco ASR 9000 Series Configuration Manual

Configuring BFD on Bundle Member Links
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/RSP0/CPU0:router(config)#
interface Bundle-Ether 1
Step 3
bfd address-family ipv4 timers start
seconds
Example:
RP/0/RSP0/CPU0:router(config-if)#
Step 4
bfd address-family ipv4 timers
nbr-unconfig seconds
Example:
RP/0/RSP0/CPU0:router(config-if)#
Step 5
commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
208
Status.
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. (In Cisco IOS XR Releases 4.0 and 4.0.1, the available
minimum is 30, but is not recommended.)
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.
Implementing BFD
Overview
OL-30423-03