Error logs on 1760 router

Unanswered Question
Aug 13th, 2009

Hi All,

I am getting the below error logs in my one of my router 1760, i found in some blogs that if no cable connected in WIC then the router is reporting the following fault on the console line and it happens every 1 minute like the device is being polled but doesn't respond.

But here cables were connected into Serial and Ethernet interfaces, still i am getting the below errors.

Is anybody experinced with this problem, can someone help me please.

Aug 14 05:30:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:31:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:32:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:33:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:34:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:35:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:36:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:37:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:38:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:39:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

Aug 14 05:40:04: %PQUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?

#x

Interface IP-Address OK? Method Status Prot ocol

FastEthernet0/0 10.xx.xx.xx YES NVRAM up up

Serial0/0 unassigned YES NVRAM up up

Serial0/0.22 172.20.x.xxx YES NVRAM up up

Ethernet1/0 10.xx.xxx.x YES NVRAM up down

Loopback0 172.20.xxx.xxx YES NVRAM up up

#sh ver

Cisco Internetwork Operating System Software

IOS (tm) C1700 Software (C1700-IPBASE-M), Version 12.3(6b), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Thu 20-May-04 00:20 by dchih

Image text-base: 0x80008120, data-base: 0x80C73B38

ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)

CE-NUK-RG uptime is 38 weeks, 6 days, 5 hours, 36 minutes

System returned to ROM by power-on

System restarted at 00:33:21 UTC Sat Nov 15 2008

System image file is "flash:c1700-ipbase-mz.123-6b.bin"

cisco 1760 (MPC860P) processor (revision 0x500) with 55597K/9939K bytes of memory.

Processor board ID FOC08202N33 (114859209), with hardware revision 0000

MPC860P processor: part number 5, mask 2

Bridging software.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

1 FastEthernet/IEEE 802.3 interface(s)

1 Serial(sync/async) network interface(s)

32K bytes of non-volatile configuration memory.

32768K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Regards,

Naidu.

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cameron.moody Thu, 08/13/2009 - 22:32

By the look of your "sh ip int bri" it is for the Eth1/0 interface not your serial.

What's plugged into the other end of that link? Have you checked it is the correct encapsulation? eg if it is a trunk, are both sides configured to be a trunk (and also both isl or dot1q)?

If it is going to a switch have you checked port security? (it may have autorecover set for 1 min which is why it keeps flapping).....

Could also be a break in the cable which causes it to be unidirectional and UDLD may be brinking it down?

ABRAHAM ATENYA Thu, 02/26/2015 - 12:48

You may also check duplex settings of the Ethernet interface.

At times changing the duplex mode from half-duplex to full duplex solves the problem.

 

Lucien Avramov Thu, 08/13/2009 - 22:35

%PQUICC_ETHER-1-LOSTCARR : Unit [dec], lost carrier. Transceiver problem?

Explanation The Ethernet 10BASE-T cable is unplugged.

Recommended Action Reconnect the 10BASE-T Ethernet cable

You can see in your show ip int br that e1/0 is up/down, that is the issue.

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