Justin Krejci wrote: > If the private link between the two sites fails, will BGP allow for us to > access the IP subnets at site 2 from site 1 via the internet given that both > sites are advertising under the same ASN?
No, because your router at site 2 will not accept any prefix with its own AS in the AS_PATH (which site 1 would be advertising from). > Is this a case where having multiple ASNs makes sense to treat each site as > remote peers to each other? Unless someone else has any better advice (I'm sure they do), you will need two separate public ASNs. Site 1 advertises it's space out of AS1, and site 2 advertises it's space from AS2. If you do that, it may be best if you have an eBGP session between the two PoPs using med/pref to ensure the direct link is preferred if it is up. (I've never had to do iBGP between two sites like this before, but I do know that eBGP is preferred over iBGP). Steve
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