Reference Guide

164 | Bidirectional Forwarding Detection (BFD)
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To establish BFD with all IS-IS neighbors:
To establish BFD with all IS-IS neighbors out of a single interface:
View the established sessions using the command
show bfd neighbors, as shown in Figure 8-14.
Figure 8-14. Viewing Established Sessions for IS-IS Neighbors
Changing IS-IS session parameters
BFD sessions are configured with default intervals and a default role. The parameters that can be
configured are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role.
These parameters are configured for all IS-IS sessions or all IS-IS sessions out of an interface; if you
change a parameter globally, the change affects all IS-IS neighbors sessions. If you change a parameter at
interface level, the change affects all IS-IS sessions on that interface.
To change parameters for all IS-IS sessions:
Step Task Command Syntax Command Mode
1 Establish sessions with all IS-IS neighbors. bfd all-neighbors ROUTER-ISIS
Step Task Command Syntax Command Mode
1 Establish sessions with all IS-IS neighbors out of an
interface.
isis bfd all-neighbors INTERFACE
Step Task Command Syntax Command Mode
1 Change parameters for all IS-IS
sessions.
bfd all-neighbors interval milliseconds
min_rx milliseconds multiplier value role
[active | passive]
ROUTER-ISIS
FTOS(conf-router_isis)#bfd all-neighbors
FTOS(conf-router_isis)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult
Clients
* 2.2.2.2 2.2.2.1 Te 2/1 Up 100 100 3 I
IS-IS BFD Sessions Enabled