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BFD and Echo Function

Not really a routing question but not sure where to put this. We have BFD configured and I see something that is not making sense. 

 

We have a Nexus 7K and a 3850 using a point to point link with the following configuration - 

 

bfd interval 150 min_rx 150 multiplier 3

 

I thought that the min rx echo function should be negotiated as 150, as both sides are set to this. What i see is - 

 

7K - From last packet 

 

Min Echo interval: 150000

 

3850  - 

 

Min Echo interval: 50000 

 

This site is remote and has latency of about 51 ms on average. The link goes down alot and I am trying to work out if this is to blame. 

 

Thanks

Brad

 

 

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