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

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

VPN problems

Dear All,

I am having a lot of problems to do a vpn connection between two cisco 837.

1 router have LAN IP and

other router have LAN IP

Both routers have WAN IP FIX , when I create a VPN (I use SDM )using WAN ips I can do a test it?s ok and the tunnel is online in both routers, but when

I try to do a ping from to not work.

I don?t Know what is the problem because the tunnel is online and I think that the parameters are ok.

I have done the vpn tunnel many times and it?s not work.

Someone can help me please

Hall of Fame Super Blue

Re: VPN problems


have you tried pinging beyond the router interface at either end ie. ping from a client behind one of the 837 routers to a client behind the other 837 router.

If the tunnel is up but the ping is not workign it could well be that the routers are not seeing the ping as interesting traffic and are not sending the traffic through the tunnel. It could also be that you have access-lists which are blocking this.

Could you send sanitised versions of the 837 configs



New Member

Re: VPN problems

Hi jon

I don?t Know how send you sanitised versions of the 837 configs.

COuld you please tell me how get this information.

Kind Regards and thanks

New Member

Re: VPN problems


Now we can reach both routers.

I can do ping from to but I still have a problem, when If switch of the router and switch on again the tunnel down, And don,t is online until I up tunnel manually.

There is any method to put online the tunnel manually when I restart the routers ?

Kind Regards

CreatePlease to create content