I have 2 cisco 3825 routers connected to two cisco 3560 switches. One is currently our main router with 3 /22 public addresses and the usual slew of rfc1918 address space routed around for internal usage. I would like to take a /24 and route it from our main router over to an identical router in a different room so that we can basically begin to isolate our colocation/dedicated customers from our home subscribers.
I'm not sure exactly how to do this so I can really use someone cisco gurus to jump in, if possible. I currently have the 2 routers connected directly via a /30, say for example here 192.168.159.97 on the main (core1) and 192.168.159.98 (core2) on the new one, on a seperate vlan between core1's gi0/1.4 and gi/0.0 on core2, the newer router. From here, I could choose to do something like this from core1:
ip route 192.168.200.0 255.255.255.0 192.168.159.98
How do I not prevent loops or otherwise hose myself? The default route on core1 one is a
ip classless ip route 0.0.0.0 0.0.0.0 172.16.254.1
and I have the interface between the two setup up like this (with a switch providing vlan access between the 2 on vlan 9.
interface GigabitEthernet0/1.4 description core1-to-core2 encapsulation dot1Q 4 ip address 192.168.159.97 255.255.255.252
I have a similar entry on core2,
ip classless ip route 0.0.0.0 0.0.0.0 192.168.159.97
interface GigabitEthernet0/1.1 encapsulation dot1Q 1 native ip address 192.168.200.1 255.255.255.0 no snmp trap link-status no cdp enable ! ip classless ip route 0.0.0.0 0.0.0.0 192.168.159.97
When I traceroute to 192.168.200.1, I get a loop between the 2 core1 and core 2 interfaces.
Edit: Sorry but I made a few typo's in the IP addresses ... s/169/168 and the interface ip address is a 1, not a 0.