Cisco 801 site-to-site access

[Morpheucide]

We have two Cisco 801 Routers which we are trying to connect between two branches of the same company over an ISDN ( BT's 2e for you UK types out there)

We are unable to get the routers to ping each other. We get 'Destination Host Unreachable' as the response when trying to ping the remote router. This happens either way round.

The curious thing is that the 'Channel One' light sparks up briefly as the ping goes over, and this also happens both ways but only on the router being contacted. The TX light flickers VERY briefly when the Channel light shows. Seems that they're seeing each other, but not understanding(!)

Any thoughts?

Thanks!!!

Richard Williams

 

[jeter]

Did you add a default gateway on the routers ?

 

[Morpheucide]

Yes we did add default gateway...

 

[dad2boyz]

We don't have much information. It could be authentication issues dialer map issues. How about a little big of this configuration.

 

[malcolmx]

Check "show isdn status" that layer2 is active. We had a case where bt line faulty at remote end.

 

[inspiron]

I have had this sort of problem with UK lines.

If you type debug isdn q921 and isdn q931 this will show debug information for layer 2 and 3.

I bet there is encapsulation errors if there is add this line to the BRI0 interface isdn send-alerting.

It cured all my problems with BT's lines.

Hope it helps