Re: ISDN DDR Problem.

vijayakumar.v · ‎09-23-2004

Hi,

I'm facing a problem with ISDN DDR on 1700 series routers, whenever there is an interesting traffic also the isdn is not triggering a call. Once the router is rebooted it starts working fine. Can somebody give some inputs on this.

IOS being used is - c1700-k9o3sy7-mz.123-1a.bin

swyt · ‎09-23-2004

run debug dialer and debug isdn q931 then send some trafic to see if the link try's to dialip.

Also do a show isdn status to see if the ISDN line is ok aswell as show isdn active to see if any calls are in progress

if it is dialing but failing run debug on chap

could you post up the router config for me to have a look at.

Cheers

Kev

vijayakumar.v · ‎09-23-2004

Hi kev,

ISDN line is ok, there is no problem and whenever I send some traffic (which is marked as interesting in the debug output) it not dialing up, show isdn active/show isdn history nothing is there its blank.

Also posted the output of debug dialer/ isdn q931.

Sep 23 17:27:18.991: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:27:19.159: BR1/0 DDR: cdp, 292 bytes, outgoing uninteresting (no dialer-group

defined)

Sep 23 17:27:19.159: BR1/0 DDR: Packet sent directly to pool or rotary group member : d

ropping packet.

Sep 23 17:27:19.159: Di1 DDR: cdp, 293 bytes, outgoing uninteresting (no lis Total A

llocated ISDN CCBs = 0

Sep 23 17:27:28.991: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:27:38.992: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:27:48.993: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:27:58.994: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:08.994: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:11.975: Di1 DDR: ip (s=10.94.255.13, d=10.94.255.1), 100 bytes, outgoing i

nteresting (ip PERMIT).

Sep 23 17:28:13.975: Di1 DDR: ip (s=10.94.255.13, d=10.94.255.1), 100 bytes, outgoing i

nteresting (ip PERMIT).

Sep 23 17:28:15.978: Di1 DDR: ip (s=10.94.255.13, d=10.94.255.1), 100 bytes, outgoing i

nteresting (ip PERMIT).

Sep 23 17:28:17.977: Di1 DDR: ip (s=10.94.255.13, d=10.94.255.1), 100 bytes, outgoing i

nteresting (ip PERMIT).

Sep 23 17:28:18.995: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:19.187: BR1/0 DDR: cdp, 292 bytes, outgoing uninteresting (no dialer-group

defined)

Sep 23 17:28:19.187: BR1/0 DDR: Packet sent directly to pool or rotary group member : d

ropping packet.

Sep 23 17:28:19.187: Di1 DDR: cdp, 293 bytes, outgoing uninteresting (no list matched)

Sep 23 17:28:19.981: Di1 DDR: ip (s=10.94.255.13, d=10.94.255.1), 100 bytes, outgoing i

nteresting (ip PERMIT).

Success rate is 0 percent (0/5)

Sep 23 17:28:28.995: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:38.996: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:48.996: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Sep 23 17:28:58.997: Di1 DDR: ip (s=10.94.255.13, d=224.0.0.5), 76 bytes, outgoing inte

resting (ip PERMIT)

Output of show isdn active

--------------------------------------------------------------------------------

ISDN ACTIVE CALLS

--------------------------------------------------------------------------------

Call Calling Called Remote Seconds Seconds Seconds Charges

Type Number Number Name Used Left Idle Units/Currency

--------------------------------------------------------------------------------

Router Config - (Posted only releated to ISDN due to security reasons)

interface BRI1/0

no ip address

encapsulation ppp

dialer pool-member 1

isdn switch-type basic-net3

interface Dialer1

ip address 10.94.255.13 255.255.255.0

encapsulation ppp

dialer pool 1

dialer string 642240654

dialer-group 1

ppp authentication chap

dialer-list 1 protocol ip permit

Regards

Vijay

paddyxdoyle · ‎09-23-2004

Hi,

What do you see when you run "debug isdn q921"

Rgds

Paddy

Richard Burts · ‎09-23-2004

One of the things I notice in the debug is the error message pointing out that while there is a dialer group on the virtual interface Dialer1 there is not any dialer group on the physical intereface BRI1/0. I would suggest that you also configure dialer-group 1 on interface BRI1/0 and see what difference that makes.

HTH

Rick

HTH

Rick

Kevin Dorrell · ‎09-23-2004

You shouldn't need a dialer-group on the physical interface. The physical interface shouldn't know anything about IP; it is just a channel for the dialer interface to use.

Looking closer at the debug, you find this is so. The uninteresting traffic that it is complaining about is CDP, which is not IP, and would not be interesting traffic anyway. What surprises me is that CDP is active on a physical BRI at all. I would kill it with "no cdp enable" on the BRI.

Anyway, I thought CDP was disabled on dialup interfaces by default. But it appears I was wrong there.

Kevin Dorrell

Luxembourg

dbellazetin · ‎09-23-2004

Vijay,

Sounds like a bug especially if it works after reload. Can you move the configuration from the dialer 1 interface to the Bri 1/0 interface.

int bri 1/0

ip add x.x.x.x

encap ppp

dialer string xxxx

ppp authen chap

dialer-group 1

Daniel

gaban · ‎09-30-2004

Try adding a ip route statement for exmaple

ip route 172.22.0.0 255.255.0.0 172.22.80.0

ip route 172.22.80.0 255.255.255.0 Dialer1

!