[c-nsp] IOS-XR BGP RR MCID (Multiple Cluster ID)

[Mark Tinka]

On 15/Mar/18 12:18, adamv0025 at netconsultings.com wrote:

> Maybe you might start looking at some scaling techniques when you'll have a need to transport multiple paths for a prefix for load-sharing or primary-backup use cases, say to reduce internet convergence times form 2 mins down to less than 1ms (MX with 2M prefixes). 

As I mentioned to Saku, we already do load balancing at the IGP/LDP
layer. We don't need multiple paths in BGP to achieve that. It works well.

The NEXT_HOP is abstracted for BGP destinations at the edge, so
installing an alternate path does not take 2 minutes. It's instant.
We've got a highly distributed (peering) edge, so a customer-serving
router will not lose the entire Internet in one go, unless that device
suffers a catastrophe itself.

Mark.