[c-nsp] simple redunancy..

[Kevin Graham]

Doing a bridge on the 2851 is an option, but if the 3750's are
part of a single stack, then just use a multi-chassis etherchannel.

Otherwise, put up /31's between the 3750's and 2851; at that point,
either terminate connectivity on a loopback, or use two tunnels for
each of the ISP's (in separate VRF's on the 2851) and let your IGP
deal with it.


----- Original Message ----
From: Roy Blamski <roy at santaba.com>
To: cisco-nsp at puck.nether.net
Sent: Monday, December 17, 2007 10:14:15 AM
Subject: [c-nsp] simple redunancy..


so something like this:

        ISP
/30           /30
 |               |
3750------3750
  |             |
  ---2851----


all devices are connected via ospf (over an internal network range)
and the links between the 2851 and 3750s are trunked.  the ISP is
routing us a /24

my dilemma:  how to keep a VPN connection up (GRE/IPSEC) that
terminates into the 2851, onto an address in the public /24, when we
lose one of the ISP connections.  it seems like i want to bridge
together the public vlan to each 3750...is that doable?  there are
other rfc1918 vlans shared between the 3750s and 2851 as well.

thanks for any help...
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