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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Establishing Sessions with IS-IS Neighbors

BFD sessions can be established for all IS-IS neighbors at once or sessions can be established for all neighbors out of a specific interface.

Figure 1. Establishing Sessions with IS-IS Neighbors
Illustration of establishing sessions with IS-IS neighbors.

To establish BFD with all IS-IS neighbors or with IS-IS neighbors on a single interface, use the following commands.

  • Establish sessions with all IS-IS neighbors.
    ROUTER-ISIS mode
    bfd all-neighbors
  • Establish sessions with IS-IS neighbors on a single interface.
    INTERFACE mode
    isis bfd all-neighbors

Example of Verifying Sessions with IS-IS Neighbors

To view the established sessions, use the show bfd neighbors command.

The bold line shows that IS-IS BFD sessions are enabled.

R2(conf-router_isis)#bfd all-neighbors
R2(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

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