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New Member

HELP on ISDN

Hi,

I implemented an ISDN solution between branch office and HQ.It doesn't work when initiate a connection from branch office to HQ while from another Branch office is ok by using the same router configuration.

(Hint:the 2 routers are 3620 and 2611,respectly.)

I give a "debug q921" and the output is as follows:

1d04h: ISDN BR0/0: TX -> SABMEp sapi = 0 tei = 80

1d04h: ISDN BR0/0: RX <- UAf sapi = 0 tei = 80

1d04h: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, TEI 80 changed to up

1d04h: ISDN BR0/0: TX -> INFOc sapi = 0 tei = 80 ns = 0 nr = 0 i = 0x08011C

0504028890180183700C803030363532363137333836

1d04h: ISDN BR0/0: RX <- RRr sapi = 0 tei = 80 nr = 1

1d04h: ISDN BR0/0: RX <- INFOc sapi = 0 tei = 80 ns = 0 nr = 1 i = 0x08019C

0D180189

1d04h: ISDN BR0/0: TX -> RRr sapi = 0 tei = 80 nr = 1

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- INFOc sapi = 0 tei = 80 ns = 1 nr = 1 i = 0x08019C

02

1d04h: ISDN BR0/0: TX -> RRr sapi = 0 tei = 80 nr = 2

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: TX -> INFOc sapi = 0 tei = 80 ns = 1 nr = 2 i = 0x08011C

4508028090

1d04h: ISDN BR0/0: RX <- RRr sapi = 0 tei = 80 nr = 2

1d04h: ISDN BR0/0: RX <- INFOc sapi = 0 tei = 80 ns = 2 nr = 2 i = 0x08019C

4D

1d04h: ISDN BR0/0: TX -> RRr sapi = 0 tei = 80 nr = 3

1d04h: ISDN BR0/0: TX -> INFOc sapi = 0 tei = 80 ns = 2 nr = 3 i = 0x08011C

5A

1d04h: ISDN BR0/0: RX <- RRr sapi = 0 tei = 80 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: TX -> RRp sapi = 0 tei = 80 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 80 nr = 3

1d04h: ISDN BR0/0: RX <- DISCp sapi = 0 tei = 80

1d04h: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0, TEI 80 changed to down

1d04h: ISDN BR0/0: TX -> UAf sapi = 0 tei = 80

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- IDCKRQ ri = 0 ai = 80

1d04h: ISDN BR0/0: TX -> IDCKRP ri = 63109 ai = 80

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

PSW_RTR1#

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- IDCKRQ ri = 0 ai = 80

1d04h: ISDN BR0/0: TX -> IDCKRP ri = 24278 ai = 80

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRf sapi = 0 tei = 67 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 81 nr = 3

1d04h: ISDN BR0/0: RX <- RRp sapi = 0 tei = 67 nr = 3

_____________________________________________________

Could anyone give me hand?Thanks.

2 REPLIES
Cisco Employee

Re: HELP on ISDN

Debug for me Q931, ppp nego and debug dialer.

Send me the #sh isdn st and #sh dialer outputs.

Plamen

New Member

Re: HELP on ISDN

Take a look first at 'show isdn status' to determine which Layer is having trouble. 'debug isdn q921', only looks at layer 2.

It looks like you are getting good tei=from the TELCO switch, so look running 'debug isdn q931' and 'debug ppp negoiate'.

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