[c-nsp] BFD on customer-facing interfaces - experiences

[Jiri Prochazka]

Hi Eric,

we are using BFD on customer facing eBGP sessions when there is explicit 
request from the customer side - and there was none problem with that, 
for the last 7 years. I think that approximately 15% of our BGP 
customers ever showed interest in BFD.

As soon as the customer understands the possible outcomes and still 
wants to implement it, there is no reason to disallow this feature. 
Reliable? Yes, definitely.

On the other hand, I would strictly avoid using BFD as default (forcing 
customers to configure this) - the only result would be angry customer 
requesting a RFO.


Jiri

On 10/5/2016 11:47 PM, Eric Louie wrote:
> We're looking for any ISPs who have experience with BFD configured on
> customer-facing interfaces (OSPF or BGP).  Was it reliable?  Did it cause
> too many false positives for down routing sessions?  What about
> re-establishing the routing protocol when BGD recovers?  Did you have issue
> with root cause analysis when the sessions dropped (as in explaining to the
> customers why their routing session went down or flapped)?
>
> thanks, Eric
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