AW: [f-nsp] VRRP-E in combination with Route-Maps

[Gunther Stammwitz]

Hello Armand,

I guess you're running BGP as outside/external routing protocol, right?
Well... That would explain why traffic is flowing the way it is: if both of
your providers are supplying you with the same as-path-lengths for most of
the prefixes - this is mostly happening when both of them are of the same
tier-class like both are tier1 - your router is always going to prefer the
the external path over the internal one.
Example:
Here we can see that the network 3.0.0.0/8 can be reached in 5 as-hops. The
internal path (5.6.7.8) as well as the external one have exactly the same
lenght and localpref but the external one is being preferred. This is a
standard mechanism in bgp (ebgp over ibgp).

*>  3.0.0.0/8          1.2.3.4                999    0      12345 3356 701
703 80 i
*i  3.0.0.0/8          5.6.7.8    0           999    0      12345 3356 701
703 80 i

I hope this was a help.
Gunther