From: 4g1vn (shaun.gomez@gmail.com)
Date: Fri Feb 27 2009 - 15:51:21 ARST
Hi Group:
I have quite the exercise from one of my clients. They currently have
an MPLS WAN with SP(A). They are thinking about bringing a second SP(B)
online with MPLS connectivity to 3 of their data center locations. The issue
is that they have 300 other locations on SP(A) and would like an alternate
path through SP(B) in the event of a link failure at one of the data
centers. Let's say that SP(A) AS is 1 and SP(B) AS is 2, the customer
remotes are private ASN's (63512-65535). The SP PE's BGP table will show
SP(A) public AS path in the BGP table and conversely SP(B) will see the
public AS of SP(A) and will not allow those paths through. I have created a
GRE tunnel and eBGP peering through SP(B) and filter out the public AS path
on the customer CE and that seems to work. I'm just curious if this is a
solid solution? Does the good folks at GS have a better recommendation for
handling this other than multi-homing every site?
Thanks,
Shaun
Blogs and organic groups at http://www.ccie.net
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