Re: Why receive "Lost communication with remote" on PRI

jjia · ‎12-15-2004

Hi,

T1/PRI, I issued debug ISDN Q921, it always displayed the following messages:

CPTORVG2#

*Dec 13 21:42:35.218: ISDN Se1/0:23 Q921: S7_T203_EXPIRY: Lost communication with remote.

*Dec 13 21:42:35.218: ISDN Se1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=68

*Dec 13 21:42:35.222: ISDN Se1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=46

*Dec 13 21:42:45.226: ISDN Se1/0:23 Q921: S7_T203_EXPIRY: Lost communication with remote.

*Dec 13 21:42:45.226: ISDN Se1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=68

*Dec 13 21:42:45.230: ISDN Se1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=46

*Dec 13 21:42:55.234: ISDN Se1/0:23 Q921: S7_T203_EXPIRY: Lost communication with remote.

*Dec 13 21:42:55.234: ISDN Se1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=68

*Dec 13 21:42:55.238: ISDN Se1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=46

*Dec 13 21:43:05.242: ISDN Se1/0:23 Q921: S7_T203_EXPIRY: Lost communication with remote.

*Dec 13 21:43:05.242: ISDN Se1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=68

*Dec 13 21:43:05.246: ISDN Se1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=46

*Dec 13 21:43:15.250: ISDN Se1/0:23 Q921: S7_T203_EXPIRY: Lost communication with remote.

*Dec 13 21:43:15.250: ISDN Se1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=68

*Dec 13 21:43:15.254: ISDN Se1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=46

I tried to increase T203 timer, but it still displayed this message.

Joe

mmellet · ‎12-21-2004

If you have any "network-clock-participate" commands in you config, try removing them. Also heard that IOS release 12.3(8)T5 doesn't give this problem.