Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Community Member

Need 2 AS400's in same subnet, but seperated by 3 router hops.

I have one set of vlans terminated on a 7204 router. I have another set of vlans terminating on on a 6509 MFSC. At each site I have an AS400, and both of these machines need to be on the same subnet for diaster recovery purposes, but in different physical locations. Other than a dedicated fiber run from one location to the other, are there any other solutions to this dilema?

3 REPLIES
Community Member

Re: Need 2 AS400's in same subnet, but seperated by 3 router hop

You may be able to get it to work with NAT, but without more information, its hard to say.

Mick.

Community Member

Re: Need 2 AS400's in same subnet, but seperated by 3 router hop

Several things are possible. It really depends on the connection between sites, etc.

One is to place a switch in the site with the 7500 and trunk the vlan between sites. In a metro net, this would be best.

You could host route one of your AS400's, and rely on proxy arp and a VLSM enabled routing protocol to find the as400.

Another might be to use IRB and GRE to tunnel your subnet across the wan.

Regards;

Doug

Re: Need 2 AS400's in same subnet, but seperated by 3 router hop

Hi,

I recently did this for a customer. We bridged the subnet together between the routers and used IRB on both routers. Worked like a champ.

I haven't tried bridging/IRB across a GRE tunnel, but IOS warns about bridging on a tunnel interface so it may work or may not. Below is warning.

router(config)#int tu1

router(config-if)#bridge-group 1

% This command is an unreleased and unsupported feature

As the others said, NAT and other ways would also possibly work but more info is needed.

150
Views
0
Helpful
3
Replies
CreatePlease to create content