This seems to be an exact repost of an earlier message. Several folks offered troubleshooting suggestions to you. What were the results of your tests?
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, February 27, 2002 2:03 PM > To: [EMAIL PROTECTED] > Subject: Serial interface problem [7:36696] > > > Hello all: > > I have two Cisco 4000-M routers in my home lab with two > serial ports on > each. S0 on Router 1 is connected to S0 on Router 2. S1 on Router 1 is > connected to S1 on Router 2. The problem is that the S1 to S1 > link comes up > and stays up. The S0 to S0 link comes up but goes down in a > few seconds. It > keeps going up and down in this way repeatedly. Could someone > please shed > some light? > > The routers are connected using DCE to DTE cross connect > cables. The DCE > ends of both connections are on Router 2 and it providing > clocking at 56000 > bits per second. Encapsulation is HDLC although I have tried > PPP with the > same problem. I have also tried changing the default > keepalive settings on > both end on the S0 to SO link. The IOS is 12.1(12) on both. I > have tried > 12.1(10) with the same results. I have also tried changing > the end where the > clocking is provided with no success. I have switched cables > and serial > interface modules but the problem remains. > > Config on Router 1: > interface Serial0 > ip address 1.1.1.1 255.255.255.0 > ! > interface Serial1 > ip address 2.2.2.1 255.255.255.0 > ! > Log entries on Router 1: > Feb 25 17:59:41: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to up > Feb 25 18:00:01: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to down > Feb 25 18:00:11: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to up > Feb 25 18:00:31: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to down > > SH IP INTERFACE BRIEF on Router 1: > Interface IP-Address OK? Method Status > Protocol > Serial0 1.1.1.1 YES NVRAM up > down > Serial1 2.2.2.1 YES NVRAM up > up > > R1#sh control serial 0 > MK5 unit 0, NIM slot 1, NIM type code 7, NIM version 1 > idb = 0x619DACBC, driver structure at 0x619E10C0, regaddr = 0x3C100300 > IB at 0x400FB1CC: mode=0x0108, local_addr=0, remote_addr=0 > N1=1524, N2=1, scaler=100, T1=1000, T3=2000, TP=1 > buffer size 1524 > DTE V.35 serial cable attached > > DEBUG SERIAL INTERFACE on Router 1 > Feb 25 18:26:31: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to down > Feb 25 18:26:40: MK5(0): New serial state = 0xA104 > Feb 25 18:26:40: MK5(0): DCD is up. > Feb 25 18:26:40: Serial0: HDLC myseq 16, mineseen 0*, > yourseen 16, line up > Feb 25 18:26:41: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to up > Feb 25 18:26:50: MK5(0): New serial state = 0x8104 > Feb 25 18:26:50: MK5(0): DCD is up. > Feb 25 18:26:50: MK5(0): Deasserting DTR > Feb 25 18:26:50: MK5(0): Deasserting DTR > Feb 25 18:26:50: MK5(0): Reset > Feb 25 18:26:50: MK5(0): Asserting DTR > Feb 25 18:26:50: MK5(0): Deasserting LTST > Feb 25 18:26:50: MK5(0): New serial state = 0xA105 > Feb 25 18:26:50: MK5(0): DCD is up. > Feb 25 18:26:50: Serial0: HDLC myseq 17, mineseen 0*, > yourseen 17, line up > Feb 25 18:26:56: MK5(0): New serial state = 0xA124 > Feb 25 18:26:56: MK5(0): DCD is up. > Feb 25 18:26:56: MK5(0): New serial state = 0xA13C > Feb 25 18:26:56: MK5(0): DCD is down. > Feb 25 18:26:56: MK5(0): New serial state = 0xA134 > Feb 25 18:26:56: MK5(0): DCD is down. > Feb 25 18:26:56: MK5(0): New serial state = 0xA114 > Feb 25 18:26:56: MK5(0): DCD is down. > Feb 25 18:26:56: MK5(0): New serial state = 0xA104 > Feb 25 18:26:56: MK5(0): DCD is up. > Feb 25 18:27:00: MK5(0): New serial state = 0xA104 > Feb 25 18:27:00: MK5(0): DCD is up. > Feb 25 18:27:00: MK5(0): Deasserting DTR > Feb 25 18:27:00: MK5(0): Deasserting DTR > Feb 25 18:27:00: MK5(0): Reset > Feb 25 18:27:00: MK5(0): Asserting DTR > Feb 25 18:27:00: MK5(0): Deasserting LTST > Feb 25 18:27:00: MK5(0): New serial state = 0xA105 > Feb 25 18:27:00: MK5(0): DCD is up. > Feb 25 18:27:00: Serial0: HDLC myseq 18, mineseen 0*, > yourseen 18, line down > > Feb 25 18:27:01: %LINEPROTO-5-UPDOWN: Line protocol on > Interface Serial0, > changed state to down > > > Config on router 2: > interface Serial0 > ip address 1.1.1.2 255.255.255.0 > clockrate 56000 > ! > interface Serial1 > ip address 2.2.2.2 255.255.255.0 > clockrate 56000 > > Log entries on Router 2: > None > > SH IP INTERFACE BRIEF on Router 2: > R2#sh ip int brief > Interface IP-Address OK? Method Status > Protocol > Serial0 1.1.1.2 YES NVRAM up > down > Serial1 2.2.2.2 YES NVRAM up > up > > R2#sh controller s 0 > MK5 unit 0, NIM slot 0, NIM type code 7, NIM version 1 > idb = 0x44A4, driver structure at 0xABDAB8, regaddr = 0x8000300 > IB at 0x6006E64: mode=0x0108, local_addr=0, remote_addr=0 > N1=1524, N2=1, scaler=100, T1=1000, T3=2000, TP=1 > buffer size 1524 > DCE V.35 serial cable attached, clockrate 56000 > > DEBUG SERIAL INTERFACE on Router 2: > Feb 25 18:30:25: Serial0: HDLC myseq 38, mineseen 0, yourseen > 0, line down > .Feb 25 18:30:26: Serial0: attempting to restart > .Feb 25 18:30:26: MK5(0): Deasserting DSR > .Feb 25 18:30:26: MK5(0): Deasserting DSR > .Feb 25 18:30:26: MK5(0): Reset > .Feb 25 18:30:26: MK5(0): Asserting DSR > .Feb 25 18:30:26: MK5(0): Deasserting LTST > .Feb 25 18:30:26: MK5(0): Asserting DCD > .Feb 25 18:30:26: MK5(0): New serial state = 0x6017 > .Feb 25 18:30:26: MK5(0): DTR is up. > .Feb 25 18:30:30: MK5(0): New serial state = 0x603E > .Feb 25 18:30:30: MK5(0): DTR is down. > .Feb 25 18:30:30: MK5(0): New serial state = 0x6016 > .Feb 25 18:30:30: MK5(0): DTR is up. > .Feb 25 18:30:35: MK5(0): New serial state = 0x6016 > .Feb 25 18:30:35: MK5(0): DTR is up. > .Feb 25 18:30:35: Serial0: HDLC myseq 39, mineseen 0, > yourseen 0, line down > .Feb 25 18:30:45: MK5(0): New serial state = 0x6016 > .Feb 25 18:30:45: MK5(0): DTR is up. > .Feb 25 18:30:45: Serial0: HDLC myseq 40, mineseen 0, > yourseen 0, line down > .Feb 25 18:30:50: MK5(0): New serial state = 0x6036 > .Feb 25 18:30:50: MK5(0): DTR is down. > .Feb 25 18:30:50: MK5(0): New serial state = 0x6016 > .Feb 25 18:30:50: MK5(0): DTR is up. > .Feb 25 18:30:55: MK5(0): New serial state = 0x6016 > .Feb 25 18:30:55: MK5(0): DTR is up. > .Feb 25 18:30:55: Serial0: HDLC myseq 41, mineseen 0, > yourseen 0, line down > .Feb 25 18:30:56: Serial0: attempting to restart > .Feb 25 18:30:56: MK5(0): Deasserting DSR > .Feb 25 18:30:56: MK5(0): Deasserting DSR > .Feb 25 18:30:56: MK5(0): Reset > .Feb 25 18:30:56: MK5(0): Asserting DSR > .Feb 25 18:30:56: MK5(0): Deasserting LTST > .Feb 25 18:30:56: MK5(0): Asserting DCD > .Feb 25 18:30:56: MK5(0): New serial state = 0x6017 > .Feb 25 18:30:56: MK5(0): DTR is up. > .Feb 25 18:31:00: MK5(0): New serial state = 0x603E > .Feb 25 18:31:00: MK5(0): DTR is down. > .Feb 25 18:31:00: MK5(0): New serial state = 0x6016 > .Feb 25 18:31:00: MK5(0): DTR is up. > .Feb 25 18:31:05: MK5(0): New serial state = 0x6016 > .Feb 25 18:31:05: MK5(0): DTR is up. > .Feb 25 18:31:05: Serial0: HDLC myseq 42, mineseen 0, > yourseen 0, line down > R2# > > Thanks, > > Andy Fernandes Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36702&t=36696 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
