02-22-2008 04:26 AM - edited 03-03-2019 08:49 PM
I configure two sites connected with bri isdn connection. The problem is that those routers do not exchange routes. The routing protocol is EIGRP.
Thanks
moses
02-22-2008 04:47 AM
Hi,
To be able to help you further, can you post both router config?
Also, thus the ISDN connection works? I mean have you tried initiating the connection manually?
ISDN BRI Troubleshooting Flowchart
http://www.cisco.com/warp/public/129/isdn_20602.html
Regards,
Dandy
02-22-2008 04:52 AM
hi,
For establishing the BRI ISDN connection you can check the following:
1.Proper configuration of your primary interface.
2.Proper configuration of your BRI (back-up) interface.
3.Proper configuration of Dialer interface.
4.Proper configuration of Authentication.
5.Proper configuration static route.
6.Proper configuration of interesting traffic with ACL.
7.Proper configuration of route summarization.
If the routers are not exchanging the routes, then please check no.7 option properly.
Thanks
Goutam
02-22-2008 06:40 AM
The configuration of one router is:
interface BRI1/0
description DA to DEPLI
bandwidth 128
ip address 10.0.1.66 255.255.255.252
encapsulation ppp
dialer idle-timeout 2147483
dialer map ip 10.0.1.65 name rea (phone number)
dialer load-threshold 255 either
dialer-group 1
isdn switch-type basic-net3
no fair-queue
The second router is similar. The two routers are communicating between them.
The no auto-summary is used in all routers for EIGRP .
The dialers list permits protocol ip
No authentication is used.
The routers do not exchange route information .
Thanks
moses
02-22-2008 07:07 AM
Can you provide furthr information regarding the routing. Submit the ROUTER EIGRP statements. Possibly you have the Dialer Interface set for Passive on either end???
02-22-2008 07:12 AM
Moses
I believe that I see the problem and it is in your dialer map:
dialer map ip 10.0.1.65 name rea (phone number)
I suggest that you add the keyword broadcast to the dialer map. Without the keyword broadcast the connection will send unicast traffic but not broadcast or multicast. If you add the keyword then the broadcast and multicast traffic will be sent. And of course EIGRP hello packets are multicast and therefore need the keyword broadcast in the dialer map.
HTH
Rick
02-22-2008 10:32 PM
Hi,
With the addition with Richard Burts, I'd like to put the command syntax:
"dialer map protocol next-hop-address [name hostname] broadcast"
for more details you can visit : http://cisco.com/en/US/docs/ios/12_1/dial/command/reference/drdrd.html#wp1018533
Also I'd like to suggest you to reduce the time-out time âdialer idle-timeout 2147483â You can put the idle-timeout 300 which is in sec to reduce the ISDN billing.
Also when you are using the ISDN BRI, I'd like to suggest you to change to âdialer load-thres 128 eitherâ instance of âdialer load-threshold 255 eitherâ. By doing that it will bring the next B-Channel. Where the users wll be able to access the required things smoothly.
Also as per my knowledge "bandwidth 128" not required.
Best of Luck
Please rate if it helps you.
Thanks
Goutam
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