[c-nsp] BGP DFZ convergence time - FIB programming

[Tim Warnock]

> For us, customer-triggered RTBH is provided as standard for all eBGP sessions
> with customers. Once they send us the right community with their own
> routes, we just pass that community on to the RR's via iBGP. The RR will relay
> those routes to all other devices in the network, and as long as those devices
> see that community (and are permitted to act on said community), traffic to
> the routes that carry the community is dropped locally on those devices.
> 

Sounds standard practice.

> 
> We don't perform any ingress iBGP policy for RTBH anywhere in the network.

We match incoming routes tagged with RTBH from the RR and rewrite to the appropriate next-hop "/dev/null" by address family, which it sounds a lot like what you guys do.

I would consider this to be "policy". Why would you not?

> 
> Mark.

-Tim.