I'm trying to avoid NAT. Could I assign say 10.0.128.69 255.255.255.252 to g0/1, then do several static routes?
g0/0 (WAN) ip add 10.0.128.66 255.255.255.252 g0/1 (Public LAN) ip add 10.0.128.69 255.255.255.252 Ip route 0.0.0.0 0.0.0.0 10.0.128.65 ip route 10.0.128.68 255.255.255.252 GigabitEthernet0/1 ip route 10.0.128.72 255.255.255.252 GigabitEthernet0/1 ip route 10.0.128.76 ... ip route 10.0.128.80 ... And so on until I hit 10.0.128.96 where I can make it a /27? All the devices behind the g0/1 interface would be placed in the 10.0.128.64/26 network with a default gateway of 10.0.128.69. Not pretty but everything should still route OK in this setup? -----Original Message----- From: sp-pri...@locus.tech.iphh.net [mailto:sp-pri...@locus.tech.iphh.net] On Behalf Of Sascha Pollok Sent: Monday, July 09, 2012 5:03 PM To: Chris Evans Cc: cisco-nsp@puck.nether.net; Spencer Barnes Subject: Re: [c-nsp] Overlapping Subnet Issue - Gateway IP Resides in Vendor Assigned Public IP Range Spencer, > You could have your isp assign a transit ip subnet for the link and > then out your ips internal your border router. Another thing you could > do static nats if the first option isn't available. > On Jul 9, 2012 7:50 PM, "Spencer Barnes" <spen...@ceiva.com> wrote: > >> Hello, >> [...] >> Our new ISP provided a gateway IP that is in the same subnet as the >> external IPs they provided for use. The range they provided (changed >> for >> security) is 10.0.128.64/26. They want us to assign 10.0.128.66 to >> our WAN interface and point all outbound traffic to 10.0.128.65. >> >> The problem with this setup is I can't dedicate another interface for >> the new external range because the subnets overlap. I can change the >> g0/0 interface to 10.0.128.66 255.255.255.252 and assign the other >> interface >> g0/1 10.0.128.96 255.255.255.224 but then I lose a bunch of external IPs. As Chris has said. When you got a T3 or similar we are not talking about some cheap residential thing. You ISP should provide a transit network! -Sascha _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/