[j-nsp] improving global unicast convergence (with or without BGP-PIC)

[Alexander Arseniev]

On 20/04/2017 09:43, adamv0025 at netconsultings.com wrote:
>
>> (b) even when BFD is down, the BGP session may be still up whereas You
>> want the BFD to follow BGP
> Now how can that happen other than bug?
>
>
To answer Your above question - when BFD goes down, BGP goes initially 
down too, but then it tries to reestablish without BFD.
And if it succeeds, then You'd have BFD down but BFD up.
Try that in the lab - configure BGP+BFD, bring down BFD by applying ACL 
or deactivating BFD config, go have a cup of coffee and come back - 
You'd see BFD down & BGP up.
HTH
Thx
Alex