Hi all, I have a problem in x.25 connection and I hope someone can help me. I have a Cisco 2501 router connected to a x.25 device. When I connected a Cisco V.35 DCE cable (Cisco generated clock signal [64k]) to that x.25 device, the serial 0 is up but the line protocol is down. All the x.25 parameters of the Cisco router and the x.25 device are same. When I start the "debug x25 all" and "debug lapb", I got the follow debug messages:
----------------------------------------------------------------------- 1d2h: Serial0: LAPB T1 SABMSENT 1143506 2 1d2h: Serial0: LAPB O SABMSENT (2) SABM P 1d2h: Serial0: LAPB T1 SABMSENT 1143509 3 1d2h: Serial0: LAPB O SABMSENT (2) SABM P ---------------------------------------------------------------------------- However, when I connect a Black Box NULL modem box between them (Cisco cable changed to V.35 DTE cable), the link protocol was up and connection can be establish. I got the following debug messages: ---------------------------------------------------------------------------- -------------------- 2d04h: Serial0: LAPB O SABMSENT (2) SABM P 2d04h: Serial0: LAPB I SABMSENT (2) UA F 2d04h: Serial0: X.25 O R/Inactive Restart (5) 8 lci 0 2d04h: Cause 0, Diag 0 (DTE originated/No additional information) 2d04h: Serial0: LAPB O CONNECT (7) IFRAME 0 0 2d04h: Serial0: LAPB I CONNECT (7) IFRAME 0 0 2d04h: Serial0: X.25 I R2 Restart (5) 8 lci 0 2d04h: Cause 7, Diag 0 (Network operational/No additional information) 2d04h: Serial0: LAPB I CONNECT (2) RR (R) 1 2d04h: Serial0: LAPB O CONNECT (2) RR (R) 1 *Mar 3 04:47:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to up ---------------------------------------------------------------------------- ------------------------- FYI, the Black Box NULL modem box is a electronic device which will generate clock signal [64k] All the configuration of Cisco router and the x.25 device were unchange, so I think it is not related to x.25 configuration. Anyone has idea? Regards, Dovelet Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39596&t=39596 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
