02-04-2013 09:56 AM - edited 03-07-2019 11:29 AM
This is a repost from a week ago. Ive attached my network diagram and running configs of the switches and routers within my lab network. My issue is when I start using the serial interfaces on my 2621xm router and 2620 router I cannot get out to the WAN from my 2950 switch. If I use f0/0 on my 2621xm and plug it into my switch everything works fine but when I shut that interface down and start using my serial interfaces my switch stops talking to my WAN network? Ive confirmed that I can get to both routers from my switch, I can even ping the interface that connects me to my WAN network on my my 2621xm router from my 2620 switch but I cannot get out past that? I would like to get this issues resolved so I can get away from the router on a stick config and use both interfaces (s0/2 and f0/0) on my 2621xm with STP and learn hands on about failover networking with cisco switches and routers. Any help would be greatly apprecialted!
02-04-2013 11:23 AM
Hi,
on 2621XM
1)
no ip nat pool nat-pool 192.168.9.10 192.168.9.19 netmask 255.255.255.0
no ip nat inside source list 6 pool nat-pool
no ip nat inside source list 7 pool nat-pool
ip nat inside source list 6 interface f0/1
2)
no ip route 192.168.1.0 255.255.255.0 192.168.11.0
int s0/2
ip address 192.168.11.1 255.255.255.252
ip route 192.168.1.0 255.255.255.0 192.168.11.2
on 2620
1)
int s0/1
ip address 192.168.11.2 255.255.255.252
2)
ip dhcp pool test-pool
no default-router 192.168.9.1
default-router 192.168.1.249
then ipconfig/release and ipconfig/renew on a host connected to the 2950
Regards
Alain
Don't forget to rate helpful posts.
02-04-2013 12:32 PM
Thanks for your help Alain, ive made the changes that your recommended but still not luck. 192.168.9.1 is my router that is directly connected to the internet, thats why I had that setup as a default route on my routers. After applying these changes I cannnot ping www.google.com from my 2620 or my 2950. I can however ping both interfaces on the 2621XM (f0/1 and s0/2) from my 2620 and my 2950. When I do a traceroute from my 2950 my first hop is 192.168.1.249 then 192.168.11.1 then I lose it. On my 2620 when I run a traceroute my first hop is 192.168.11.1 and then I lose it. looks like its routing correctly but cant get back if I try going out? Ive attached screen shots of the changes you requested and a tracroute from the 2621xm going out to the internet. I appreciate your help and again any help on this would be greatly appreciated!
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide