late collision error in cisco 881 router

[alexageorge]

Hi all,

      I am facing a problem with  my cisco 881 router. The router is configured and line is up between ISP , and also can use internet from internal users.

But when i checked on the router, every 10 secs i found that error messages.

%PQII_PRO_FE-5-LATECOLL: PQII_PRO/FE(4), Late collision

The internet goes down often and comes up only when the router is restarted.

this is my IOS version.

Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.0(1)M4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Fri 29-Oct-10 00:02 by prod_rel_team

ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)

xxxx uptime is 2 days, 16 hours, 1 minute
System returned to ROM by power-on
System image file is "flash:c880data-universalk9-mz.150-1.M4.bin"
Last reload type: Normal Reload

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

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export@cisco.com.

Cisco 881 (MPC8300) processor (revision 1.0) with 236544K/25600K bytes of memory.
Processor board ID FHK144973KN

5 FastEthernet interfaces
1 Virtual Private Network (VPN) Module
256K bytes of non-volatile configuration memory.
126000K bytes of ATA CompactFlash (Read/Write)

License Info:

License UDI:

-------------------------------------------------
Device#      PID            SN
-------------------------------------------------
*0        CISCO881-K9           FHK144973KN   

License Information for 'c880-data'
    License Level: advsecurity   Type: Permanent
    Next reboot license Level: advsecurity

Configuration register is 0x2102

-#- --length-- -----date/time------ path
1     28461436 Mar 01 1984 00:01:00 c880data-universalk9-mz.150-1.M4.bin
2         3331 Jan 05 2011 12:27:48 cpconfig-8xx.cfg
3      2941440 Jan 05 2011 12:28:04 cpexpress.tar
4         1038 Jan 05 2011 12:28:14 home.shtml
5       115712 Jan 05 2011 12:28:40 home.tar
6      1697952 Jan 05 2011 12:28:56 securedesktop-ios-3.1.1.45-k9.pkg
7       415956 Jan 05 2011 12:29:08 sslclient-win-1.1.4.176.pkg

94633984 bytes available (33652736 bytes used)

I used IP address for WAN port fe4 and for internal, use vlan 1 with public ip range.

Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0              unassigned      YES unset  up                    up
FastEthernet1              unassigned      YES unset  down                  down
FastEthernet2              unassigned      YES unset  up                    up
FastEthernet3              unassigned      YES unset  down                  down
FastEthernet4              x.x.x.x         YES NVRAM  up                    up
Vlan1                      x.x.x.x         YES NVRAM  up                    up

When I look at the Sh interface fastethernet4 there has so many output errors , and I configure very simple and just use default route.

Please suggest me what should I do to solve this problem .

Thanks a lot

Alex

[Mahesh Gohil]

Hi,

Can you check duplex setting on fastethernet4 and the other end of device. i mean also check duplex setting on device connected

to Fa4 interface. Both end should have identical duplex setting

Regards

Mahesh

[alexageorge]

Hi Mahesh,

The fastethernet4 of router is connected to a modem. I tried changing the duplex setting in the router. When I configure fa4 to full duplex the entire internet is getting disconnected. The line protocol is becoming down. Even from inside the router I am not getting internet. When the duplex is changed to half duplex, the internet is coming up but the error message is popping up. When it is changed to duplex auto, in the sh interface fa4, it is showing as half duplex. Also when we set the value to duplex half or auto, the problem I mentioned earlier occurs.

Regards,

Alex

[Richard Burts]

Alex

The late collisions are a classic symptom of a duplex mismatch. The duplex mismatch happens frequently when one device does not negotiate duplex and results in the other device operating in half duplex. I would have thought that setting your interface to full duplex would have fixed the problem. But you say that it brings the link down. My advice would be to talk to whoever supplied the modem and ask them to help you get a setting that works.

HTH

Rick

Sent from Cisco Technical Support iPhone App

[Michal Dobrzynski]

HI,

We are experiencing exactly the same problem. It seems that it's not the modem which is to blame but the Cisco 881 router.

We use 2 different type of routers to connect our customers to BT. Cisco 1841 which works perfectly fine and Cisco 881. The requirement is that the router needs to be set to 10Meg and Full duplex. When we set it up the interface comes up/up, however nothing is added to the routing table.

This only happens on Cisco 881. cisco 1841/1941 do not have this problem.

Any ideas?

Thanks,

Michal

[Richard Burts]

Michal

You posted in a thread about a problem with late collision. But you do not describe a problem that involves late collision. Your problem seems to be that nothing is added to the routing table. Is my understanding correct?

Have you configured an IP address on the interface? Have you configured the interface for DHCP? Perhaps you could post the configuration?

HTH

Rick

Sent from Cisco Technical Support iPhone App

[Michal Dobrzynski]

HI Richard,

Sorry about not being too clear on what the problem was. Basically we experienced exactly the same problem as per the original post.

We have BT Hatteras box which is hard set to duplex full and speed 10 and we want to connect Cisco 881 to it. When we have set the 881 to speed 10 and duplex full on the WAN interface then the circuit would not come, however "show ip interface brief" would indicate that the WAN interface as being UP/UP. Routing table in this case was empty.

When we have changed Cisco 881 to duplex auto and speed 10 then we were able to ping across the link however with the huge amount of late collisions due to duplex mismatch on both ends.

Hope that this makes sense.

At the end we managed to upgrade the IOS to the latest version which solved the problem.

Best regards,

Michal

[Richard Burts]

Michal

Thanks for clarifying the nature of your problem. And especially thanks for posting and letting us know that a code upgrade was successful in resolving the issue. +5 to you for this.

HTH

Rick

[pbelletty]

Hi Michal

I have a similar issue. Could you tell me what version of IOS you upgraded to.

Kind regards,

Phil