Enabling BFD in only one side

Answered Question
Oct 13th, 2009
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Hi Everybody


The theory tells that if BFD stops to receive keepalives, it informs to the routing protocols that the neihgbor is down. If I configure BFD only in one side and associate BFD with the routing protocol, the neighborship goes down?


Thanks

Correct Answer by Laurent Aubert about 7 years 7 months ago

Hi,


You need BFD on both side but you could use echo mode on one side only.


I tested it with 12.2(33)SRC2, and configuring BFD on one side only doesn't bring down the IGP adj. The BFD session stays in AdminDown state.


HTH


Laurent.

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Correct Answer
Laurent Aubert Wed, 10/14/2009 - 18:35
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  • Cisco Employee,

Hi,


You need BFD on both side but you could use echo mode on one side only.


I tested it with 12.2(33)SRC2, and configuring BFD on one side only doesn't bring down the IGP adj. The BFD session stays in AdminDown state.


HTH


Laurent.

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