multiple data centers and one AS

[SurfBits]

I understand (from an earlier post on a different thread, "Do I need a new ASN number for new DataCenter" [`11-14-08]) that one side would reject routes with an origin AS of its own, thus it won't have the remote side prefixes in its routing table.  For basic reachability requirements, would it not just be as simple as adding static routes on each side?

 If establishing an iBGP mesh between data centers, has anyone used GRE or IPSEC tunnel instead of a point to point or MPLS connection?

[GuyDavies]

Hi SurfBits,

Depending upon the level of resillience you're looking for, static routes from the DC may well be the easiest option.  However, I suspect that static routing doesn't give the level of resillience that the OP was after :-)

If you're using the same AS in all the DCs, then it is possible to use 'loops' when defining the autonomous-system so that you can accept information from remote DCs using the same AS number

set routing-options autonomous-system <asn> loops 1

Rgds,

Guy 

[SurfBits]

GuyDavies...Thank you!