Example 936 debug isdn q921 Command

r5#debug isdn q921

ISDN Q921 paekets debugging is on

Dee 22 04:06:03.183: ISDN BR0: TX -> RRp sapi = 0 tei = 108 nr = 1 Dee 22 04:06:03.211: ISDN BR0: RX <- RRf sapi = 0 tei = 108 nr = 1 Dee 22 04:06:03.351: ISDN BR0: TX -> RRp sapi = 0 tei = 109 nr = 1 Dee 22 04:06:03.375: ISDN BR0: RX <- RRf sapi = 0 tei = 109 nr = 1 r5#ping 192.168.9.21

Sending 5, 100-byte ICMP Eehos to 192.168.9.21, timeout is 2 seeonds: .!!!!

Sueeess rate is 80 pereent (4/5), round-trip min/avg/max = 36/36/36 ms

Dee 22 04:06:15.787: ISDN BR0: TX -> INFOe sapi = 0 tei = 108 ns = 1 nr = 1 i

=

0x08 0104 0504 02 8 8 9018 01832C0738333538363631

Dec

22 04:

06:

15 .

999

: ISDN BR0: RX <- INFOc sapi = 0 tei

= 108 ns = 1

nr = 2 i

=

0x0801840218018 9 952A1B8 0 94 02 603D8 3 07 3 83335383636318E0B2054656C746F6E65203120

Dec

22 04:

06:

16.

015

: ISDN BR0: TX -> RRr sapi = 0 tei =

108 nr = 2

Dec

22 04:

06:

16.

. 127

: ISDN BR0: RX <- INFOc sapi = 0 tei

= 108 ns = 2

nr = 2 i

^xC

18018407

Dec

22 04:

06:

16.

139

: ISDN BR0: TX -> RRr sapi = 0 tei =

108 nr = 3

Dec

22 04:

06:

16.

143

: %LINK-3-UPDOWN: Interface BRI0:1, changed state to

up

Dec

22 04:

06:

16.

179

: %ISDN-6-CONNECT: Interface BRI0:1 is

now connected

to 8358661

Dec

22 04:

06:

16.

187

: ISDN BR0: TX -> INFOc sapi = 0 tei

= 108 ns = 2

nr = 3 i

=

0x0 8 0104 0F

Dec

22 04:

06:

16.

231

: ISDN BR0: RX <- RRr sapi = 0 tei =

108 nr = 3

Dec

22 04:

06:

17 .

187

: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,

changed

state

to

up

Dec

22 04:

06:

22 .

. 183

: %ISDN-6-CONNECT: Interface BRI0:1 is

now connected

to 8358661

Dec

22 04:

06:

33 .

. 379

: ISDN BR0: TX -> RRp sapi = 0 tei =

109 nr = 1

Dec

22 04:

06:

33 .

403

: ISDN BR0: RX <- RRf sapi = 0 tei =

109 nr = 1

Dec

22 04:

06:

46.

235

: ISDN BR0: TX -> RRp sapi = 0 tei =

108 nr = 3

Dec

22 04:

06:

46.

,259

: ISDN BR0: RX <- RRf sapi = 0 tei =

108 nr = 3

Dec

22 04:

07 :

03 .

. 407

: ISDN BR0: TX -> RRp sapi = 0 tei =

109 nr = 1

Dec

22 04:

07 :

03 .

435

: ISDN BR0: RX <- RRf sapi = 0 tei =

109 nr = 1

Dec

22 04:

07 :

12 .

,887

: %ISDN-6-DISCONNECT: Interface BRI0:1

disconnected

from

8358661

r6,

call

lasted 56 seconds

Dec

22 04:

07 :

12 .

899

: ISDN BR0: TX -> INFOc sapi = 0 tei

= 108 ns = 3

nr = 3 i

=

0x0 8 010445 0 8

Ü 02 8

090

Dec

22 04:

07 :

12 .

991

: ISDN BR0: RX <- INFOc sapi = 0 tei

= 108 ns = 3

nr = 4 i

=

0x0801

844D

Dec

22 04:

07 :

12 .

, 999

: ISDN BR0: TX -> RRr sapi = 0 tei =

108 nr = 4

Dec 22 04:07:13.011: isdn_Call_disconnect()

Dec 22 04:07:13.011: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down Dec 22 04:07:13.043: ISDN BR0: TX -> INFOc sapi = 0 tei = 108 ns = 4 nr = 4 i = 0x0 8 01045A

Dec 22 04:07:13.111: ISDN BR0: RX <- RRr sapi = 0 tei = 108 nr = 5

Dec 22 04:07:14.011: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to down r5#no debug isdn q921 ISDN Q921 packets debugging is off

Follow along with the output of Example 9-36 to look at the call control procedures over SAPI 0, th dynamic a ssignme at of th e TEIs , aad the Tx and Rx for the C/R activity. I hav e sha ded the changes BRI interface sta tus so that you oak follow tlse steins. The debug bri command enables you to watc actual TEI negotiation.

It is often helpful to know whether call setup has ever occurred for troubleshooting purposes. Revie history of calls in Example 9-37.

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