[isp-bgp] Re: BGP administrative distance question

["Terry Baranski" <tbaranski@...>]

> Imagining what kind of bad stuff will happen if you prefer 
> internal routes over external ones instead is left as an 
> exercise for the reader.

I'm interested to hear thoughts on Cisco's AD values, which prefer eBGP
over all other protocols except EIGRP summary routes, vs. Juniper's
protocol preference values which have BGP (no distinction between eBGP
and iBGP) higher than everything except MSDP.  

When the same prefixes are in BGP and an IGP, when does it make sense to
prefer one over the other?  Or is it always a bad idea to have duplicate
BGP/IGP routes like this in the first place?

-Terry







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