From: Ronnie Royston (RonnieR@xxxxxxxxxxxxxxxxx)
Date: Sat Mar 03 2001 - 19:18:07 GMT-3
Because you are running back-to-back, there is no need to set up the
signaling pvc (pvc 0/5 qsaal), like you said.
Be sure that you have a serial crossover cable between the ATM interfaces.
Because you aren't mapping the far end ip address to the pvc manually,
inverse arp should work for you, but you might try adding "protocol ip
132.2.66.1 broadcast" to the bearer pvc.
Take out the map-group commands.
A basic config should look something like below and should work. If it
doesn't take a look at the cable.
int atm 0
ip address 1.1.1.1 255.255.255.0
atm pvc 2/2
proto ip 1.1.1.2 broad
no shut
-----Original Message-----
From: Christopher M. Heffner
To: Ccielab@Groupstudy. Com (E-mail)
Sent: 3/2/01 9:05 PM
Subject: ATM Back-to-Back
Hay Guys:
Trying to get atm up and running back-to-back. I have it
working between a 3640 and a 2621. Now trying the same thing between
two 4500 routers. Once ATM interface is listed as up/up but the other
is listed as down/down. That confuses me right off the bat since they
are wired back to back. How can one side of the same link be up/up and
the other side be down/down?
Here is the interface configurations for both routers. Can you see
anything wrong?
R4500-1#sh run int atm 0
Building configuration...
Current configuration : 169 bytes
!
interface ATM0
ip address 132.2.66.2 255.255.255.0
map-group pvc-4500
atm clock INTERNAL
atm pvc 1 0 5 qsaal
atm pvc 2 0 300 aal5snap
no atm ilmi-keepalive
end
R4500-2#sh run inter atm 0
Building configuration...
Current configuration : 149 bytes
!
interface ATM0
ip address 132.2.66.1 255.255.255.0
map-group pvc-4500
atm pvc 1 0 5 qsaal
atm pvc 2 0 300 aal5snap
no atm ilmi-keepalive
end
The atm pvc 1 0 5 qsaal should not be needed. I am not running it on
the 3640/2621 combination but I thought I would try it just to see if it
would make a difference. It did not.
Thanks,
Chris
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