01-23-2007 04:18 AM - edited 03-03-2019 03:27 PM
This has been set up to dial back to our DBU router. Do these configs look correct. These are the errors that I am getting in the routers log.Could this be a service provider issue or a mis-config issue. Please help ASAP. I will rate.
%ISDN-6-LAYER2DOWN: Layer 2 for Interface Se3/2:23, TEI 0 changed to down
%ISDN-6-LAYER2UP: Layer 2 for Interface Se3/2:23, TEI 0 changed to up
Remote site
interface BRI0/0
description Dial Backup to <router hostname> Dialer 251
ip address x.x.x.x x.x.x.x
encapsulation ppp
ip summary-address eigrp 100 x.x.x.x x.x.x.x 5
carrier-delay msec 0
dialer idle-timeout 30
dialer string <number>
dialer load-threshold 1 outbound
dialer watch-disable 15
dialer watch-group 1
dialer-group 1
isdn switch-type basic-net3
ppp authentication chap
ppp multilink
end
interface Dialer XXX
description Dialer-Profile for <rtr name> (Dialer-xxx)
ip unnumbered Loopback251
encapsulation ppp
ip summary-address eigrp 100 x.x.x.x x.x.x.x 5
ip summary-address eigrp 100 x.x.x.x x.x.x.x 175
ip policy route-map < policy name>
dialer pool 251
dialer remote-name <rtr hostname>
dialer idle-timeout 0
dialer string <Number>
dialer load-threshold 1 outbound
dialer max-call 2
dialer-group 1
no peer default ip address
no cdp enable
ppp authentication chap
ppp multilink
end
01-23-2007 04:58 AM
Josh:
The errors that you are seeing is referring to the D-Channel off the ISDN PRI T-1 that you must have. Probably the line is configured wrong or the line is down from the carrier. You need to do a show controller T-1 for the port and see if you are getting any errors or alarms off the T-1. Can you provide the configuration off the router with the T-1. Just the T-1 config and ISDN configs...Thanks...
01-23-2007 05:36 AM
This is the layer 2 debug output that I got.
Jan 23 08:24:27.855: ISDN Se2/2:23 Q921: User TX -> RRp sapi=0 tei=0 nr=126
Jan 23 08:24:27.859: ISDN Se2/2:23 Q921: User RX <- RRf sapi=0 tei=0 nr=114
Jan 23 08:24:28.659: ISDN Se2/3:23 Q921: User TX -> RRp sapi=0 tei=0 nr=8
Jan 23 08:24:28.663: ISDN Se2/3:23 Q921: User RX <- RRf sapi=0 tei=0 nr=100
Jan 23 08:24:32.775: ISDN Se3/2:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 23 08:24:32.923: ISDN Se3/2:23 Q921: User RX <- RRp sapi=0 tei=0 nr=0
Jan 23 08:24:32.927: ISDN Se3/2:23 Q921: User TX -> RRf sapi=0 tei=0 nr=0
Jan 23 08:24:33.775: ISDN Se3/2:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 23 08:24:34.775: ISDN Se3/2:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 23 08:24:35.775: ISDN Se3/2:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 23 08:24:36.775: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:37.775: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:38.063: ISDN Se2/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=72
Jan 23 08:24:38.067: ISDN Se2/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=117
Jan 23 08:24:38.775: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:39.775: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:40.775: %ISDN-6-LAYER2DOWN: Layer 2 for Interface Se3/2:23, TEI 0 changed to down
Jan 23 08:24:40.779: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:41.687: ISDN Se3/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=110
Jan 23 08:24:41.691: ISDN Se3/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=57
Jan 23 08:24:41.779: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:42.779: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:43.779: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:44.779: ISDN Se3/2:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 23 08:24:44.783: ISDN Se3/2:23 Q921: User RX <- UAf sapi=0 tei=0
Jan 23 08:24:44.783: %ISDN-6-LAYER2UP: Layer 2 for Interface Se3/2:23, TEI 0 changed to up
Jan 23 08:24:45.367: ISDN Se2/1:23 Q921: User TX -> RRp sapi=0 tei=0 nr=79
Jan 23 08:24:45.371: ISDN Se2/1:23 Q921: User RX <- RRf sapi=0 tei=0 nr=127
Jan 23 08:24:47.207: ISDN Se4/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=41
Jan 23 08:24:47.211: ISDN Se4/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=22
Jan 23 08:24:47.583: ISDN Se3/1:23 Q921: User TX -> RRp sapi=0 tei=0 nr=12
Jan 23 08:24:47.587: ISDN Se3/1:23 Q921: User RX <- RRf sapi=0 tei=0 nr=124
Jan 23 08:24:47.591: ISDN Se3/3:23 Q921: User TX -> RRp sapi=0 tei=0 nr=116
Jan 23 08:24:47.595: ISDN Se3/3:23 Q921: User RX <- RRf sapi=0 tei=0 nr=2
The T-1 configs haven't changed they are the same they have been for a year. It was the ISDN congigs that were changed. This seems to be bouncing for the past couple days every 2-5 min. I opened a tkt with the lec they stated they couldn't loop our csu. Do you think this is a layer 2 issue and not a config issue?
01-23-2007 05:47 AM
This could be a layer 1 or layer 2 issue. Can you please provide the configurations for both routers...
01-23-2007 05:58 AM
It looks to be a LEC problem. The only reason I would suspect a mis-config is someone changed the config on the same day that it started having a problem. I am on the phone with the lec now trying to resolve this issue. Thank you very much for your help I will let you know how it goes.
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