16 Jul
2013
16 Jul
'13
3:29 p.m.
On Tue, Jul 16, 2013 at 9:35 AM, Brian Kantor
<Brian(a)ucsd.edu> wrote:
everyone else who is doing multiple peering points has independent
connectivity
between those points
In our case, we already have that with the tunnels, so I can totally see
this working.
As mentioned before, we would need a new AS number from ARIN. We would
also need to designate a small chunk of the 44 space for anycasting on the
internet. Every BGP gateway router would send announcements for 44/8 using
the new ASN. Each router will also listen on the same anycast IP for
tunnel traffic (such as 44.255.255.1). When IPIP packets are received on
that address, it will route them using the tunnel matrix. The subnet
routers (the ones not using BGP) would need a static route that sends the
anycast IP range out through their internet connection instead of through
the tunnel.
The advantage of this configuration would not only be redundancy, but
anycasting also allows the traffic to automatically route to it's closest
gateway. This is what many CDNs and DNS providers do.