[j-nsp] BGP advertise-inactive (even not the *best* BGP route)

[Pedro Roque Marques]

Richard A Steenbergen writes:


> You receive 4.0.0.0/8 from 3 transit providers homed on one
> router. How, other than through the cli on the router itself, do you
> see all 3 possible paths in an external route analysis.

Use a rib-group to leak each provider routes to both inet.0 and
provider-a.inet.0.

You can then propagate the provider-{a,b,c} routes via 2547 or not.

I've seen this used by people that have customers that insist that its
routes be forwarded via a particular upstream. You can just keep a
copy of the tables per upstream...

How many you can keep clearly depends on equipment... but w/ existing
equipment you can probably do 3/4 upstreams. Also depends if you
absolutly need every single route.... If you don't get full routing
you can probably go into orders of magnitude higher. The main
limitation is on what the forwarding engines can do.

  Pedro.