Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
New Member

Late Collision on the switch

I've a router connected to a switch, and the switch keep on displaying the errors below, bothe the switch and router are on auto-neg. When i fixed the speed and duplex, the connection went down, any idea what goes wrong ??

*Mar 1 10:48:25.176: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:48:27.095: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:48:29.319: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:50:31.074: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:50:31.723: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:50:32.793: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:50:37.901: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

*Mar 1 10:50:53.110: %AMDP2_FE-5-LATECOLL: Ethernet0/0 transmit error

Thanks.

10 REPLIES
New Member

Re: Late Collision on the switch

Late collisions is caused by a time delay ussually a cable length problem or maybe NIC card issue. Here is a link that expalins late collission.

http://www.cisco.com/en/US/tech/tk389/tk214/technologies_tech_note09186a008009446d.shtml#topic4

Let me know if this helps.

Silver

Re: Late Collision on the switch

You are running a 10Meg interface. Is there an ethernet transceiver on the interface? If so you may need to replace it. Or you may have a duplex mismatch with your hub or switch. Are you running a hub? If so, do you have alot of users or traffic on it. These items can cause late collisions...

New Member

Re: Late Collision on the switch

no hub is involved, the cisco router on run on ethernet (10Mb), and hence only half duplex is used, and the cisco switch is running on auto neg...

as mentioned, i've tried to fix the speed at the switch at 10/half, but after configured, the link went down..

Silver

Re: Late Collision on the switch

Again, are you running a transceiver off the back of the router interface? If so I would replace it. I would also hard code the switch for 10M/Half. And make sure your router interface is also set for half duplex....

New Member

Re: Late Collision on the switch

nope..no tranceiver involved..

the router is hardcoded to half duplex, but not the switch, once hardcoded, the link went down..

Green

Re: Late Collision on the switch

Change your cable (preferably to something purchased pre-terminated / already connectorized).

The symptoms you describe are frequently caused by a bad cable, or one that was not terminated properly (split pair, pins 3&6).

Give it a shot.

Good Luck

Scott

New Member

Re: Late Collision on the switch

the cable used are the one comes with the cisco router..so, i guess that wont be the problem, right??

New Member

Re: Late Collision on the switch

Still I think you have to try this by changing the patch cable.

You also mentioned that once you changed the auto settings on the

switch to force it to a manual speed/duplex, the interface went down. But I

think u need to wait for a while as its usual for the interface to go

down and come up, sometimes it flaps twice before coming up. Hope one of

these solutions work for you. If so please rate it.

New Member

Re: Late Collision on the switch

i've waited for around 5 minutes, aren't that enough??

New Member

Re: Late Collision on the switch

one thing i noticed, is the connection to the switch is at the gigabit port, will that be a problem??

217
Views
0
Helpful
10
Replies
CreatePlease to create content