[c-nsp] Excessive AMDP2_FE-3-UNDERFLO

Rolf Mendelsohn rolf-web at internet.ao
Mon Aug 11 14:25:08 EDT 2008 

Hi Nimal,

Check you processor / memory utilisation & check that all traffic is being CEF 
switched:

sh proc cpu
sh proc cpu history

sh mem

sh switching

If traffic is being CEF switched and your CPU is running very high, you may 
consider upgrading your NPE - btw. what NPE do you have in that router?

cheers
/rolf

On Wednesday 06 August 2008 14:09:54 Nimal David Sirimanne wrote:
> Hi guys,
>
> Need some advice.
>
> One of the interfaces on my border routers is consistently getting
> AMDP2_FE-3-UNDERFLO messages during its peak usage (9am-5pm) hours. The
> interface FastEthernet2/0 is seeing approx 40Mbps out and 15 Mbps in.
>
> The explaination for this error on Cisco website is:
>
> ------------
> Explanation    While transmitting a frame, the controller chip's local
> buffer received insufficient data because data could not be transferred
> to the chip fast enough to keep pace with its output rate. Normally,
> such a problem is temporary, depending on transient peak loads within
> the system.
>
> Recommended Action    The system should recover. No action is required.
> ------------
>
> I need some convincing of that. Of late, i've received a few reports of
> packet loss to my network of late, and am not sure if this transmit
> error has anything to do with it. Any help is much appreciated! FYI, the
> router in question is a Cisco 7206VXR. The interface is 100Mbps capable.
>
> Aug  6 09:05:51 202.X.X.X 16758: Aug  6 09:05:50.850 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 09:22:54 202.X.X.X 16759: Aug  6 09:22:53.283 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 09:25:09 202.X.X.X 16760: Aug  6 09:25:08.771 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 09:35:22 202.X.X.X 16761: Aug  6 09:35:21.443 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 09:48:33 202.X.X.X 16762: Aug  6 09:48:32.053 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 10:07:07 202.X.X.X 16764: Aug  6 10:07:06.674 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 10:08:37 202.X.X.X 16765: Aug  6 10:08:36.702 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 10:17:37 202.X.X.X 16766: Aug  6 10:17:36.630 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 10:42:52 202.X.X.X 16775: Aug  6 10:42:51.517 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:03:00 202.X.X.X 16783: Aug  6 11:02:59.377 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:04:22 202.X.X.X 16784: Aug  6 11:04:21.672 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:04:22 202.X.X.X 16785: Aug  6 11:04:21.672 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:17:19 202.X.X.X 16786: Aug  6 11:17:18.339 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:29:52 202.X.X.X 16787: .Aug  6 11:29:51.219 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:36:07 202.X.X.X 16788: Aug  6 11:36:06.764 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:41:57 202.X.X.X 16789: Aug  6 11:41:56.615 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:43:26 202.X.X.X 16790: Aug  6 11:43:25.694 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:49:07 202.X.X.X 16791: Aug  6 11:49:06.796 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 11:50:07 202.X.X.X 16792: Aug  6 11:50:06.636 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 12:23:37 202.X.X.X 16794: Aug  6 12:23:36.735 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 12:29:37 202.X.X.X 16795: Aug  6 12:29:36.649 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 12:39:27 202.X.X.X 16796: Aug  6 12:39:26.629 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 13:05:30 202.X.X.X 16803: Aug  6 13:05:29.396 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 14:21:40 202.X.X.X 16805: Aug  6 14:21:39.319 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 14:33:30 202.X.X.X 16806: Aug  6 14:33:29.319 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 14:36:55 202.X.X.X 16807: Aug  6 14:36:54.313 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 14:46:58 202.X.X.X 16808: Aug  6 14:46:57.086 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:10:52 202.X.X.X 16810: Aug  6 15:10:51.737 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:11:09 202.X.X.X 16811: Aug  6 15:11:08.061 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/1 transmit error
> Aug  6 15:13:52 202.X.X.X 16812: Aug  6 15:13:51.740 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:14:11 202.X.X.X 16813: Aug  6 15:14:10.795 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:18:59 202.X.X.X 16814: Aug  6 15:18:58.742 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:23:43 202.X.X.X 16815: Aug  6 15:23:42.172 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:46:06 202.X.X.X 16817: Aug  6 15:46:05.635 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 15:53:55 202.X.X.X 16818: Aug  6 15:53:54.048 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:09:06 202.X.X.X 16820: Aug  6 16:09:05.570 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:15:53 202.X.X.X 16821: Aug  6 16:15:52.157 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:17:43 202.X.X.X 16822: Aug  6 16:17:42.039 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:33:40 202.X.X.X 16823: Aug  6 16:33:39.344 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:35:08 202.X.X.X 16824: Aug  6 16:35:07.359 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:38:27 202.X.X.X 16825: Aug  6 16:38:26.278 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:44:58 202.X.X.X 16826: Aug  6 16:44:57.748 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:44:58 202.X.X.X 16827: Aug  6 16:44:57.748 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:49:07 202.X.X.X 16828: Aug  6 16:49:06.738 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/0 transmit error
> Aug  6 16:50:46 202.X.X.X 16829: Aug  6 16:50:45.557 MAL:
> %AMDP2_FE-3-UNDERFLO: FastEthernet2/1 transmit error
>
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