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

Help! No Routing after IP Change

I am a novice with networking; so, if I write something noobish, please forgive and explain. I am using a Cisco 2821 router.

My provider changed my IP address today from:

218.x.x.x /24  with a gateway of 218.x.x.1 /24

to

219.x.x.x /25  with a gateway of 219..x.x.1 /25

I changed the IP address for the interface GE0/0 to the new IP address. I can ping the router no problem from the LAN.

I changed the static route from:

ip route 0.0.0.0 0.0.0.0 218.x.x.1

to

ip route 0.0.0.0 0.0.0.0 219.x.x.1

The router cannot ping the gateway; thus, no Internet.

When I change the static route to the interface:

ip route 0.0.0.0 0.0.0.0 GigabitEthernet 0/0   I am able to ping the gateway, but still not able to access the Internet.

I am running a Windows 2008 network with 2 DNS servers.

It was working fine before the change. Any suggestion before I have to hire someone to fix it?

2 REPLIES
Purple

Help! No Routing after IP Change

Hi,

delete the static route pointing to the interface and reconfigure the one pointing to next-hop then try to clear the arp cache on the router with clear arp interface g0/0.

clear also your dynamic nat translations with clear ip nat trans *.

Regards.

Alain

Don't forget to rate helpful posts.
Community Member

Help! No Routing after IP Change

Thanks Alain!!

Establishing the static route with the interface g0/0, and then entring the optional IP Address of the next hop, did the trick!

Robert

239
Views
0
Helpful
2
Replies
CreatePlease to create content