Re: [isp-bgp] Multihoming Best Practice

[Pete Templin <petelists@...>]

vdadlaney@... wrote:

> Could you please elaborate on option 1. I apologize but if I
> understood the scenario correctly than option 1 would work and will
> be redundant as well because in order for the provider to advertise
> the address space I assume it would be done either via redistribution
> or via the network statement. If using the redistribute statment if
> the static route is pointed to the interface on the provider router
> than it won't advertise the route if the interface goes down and if
> using the network statement than it won't advertise the route if the
> link goes down because the route has to be in the routing table in
> order for BGP to advertise it. It will cause the inconsistent AS in
> BGP however from a redundancy prespective I think it should work.
> Please let me know if I have misunderstood. Thanks

Some networks (me!) have more than one router.  "Link up" does not mean 
"reachability", therefore "link up" can mean "blackholed packets".

pt





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