5500 getting weird errors after upgrade of IOS to 6.3.6

[nyurkovich]

Hello,

In out network environment we have aaproximately forty 5500 switches, they have all been getting IOS upgrades over the past month or so. They are all running dual sup3g's. Now previously machines have taken the upgrade with no problem from IOS 5.5(6) to 6.3(6) but most recently on one of them after the upgrade I am now receiving errors that look like this....

2002 Sep 27 05:30:41 EST -04:00 %SYS-4-PORT_WARN:Port 9/7 dmaTxFull (12626) dmaRetry (0) dmaLevel2Request (0)

2002 Sep 27 05:30:42 EST -04:00 %SYS-4-PORT_WARN:Port 9/11 dmaTxFull (12631) dmaRetry (0) dmaLevel2Request (0)

2002 Sep 27 05:30:42 EST -04:00 %SYS-4-PORT_WARN:Port 9/21 dmaTxFull (12620) dmaRetry (0) dmaLevel2Request (0)

2002 Sep 27 05:30:44 EST -04:00 %SYS-4-PORT_WARN:Port 11/11 dmaTxFull (11837) dmaRetry (0) dmaLevel2Request (0)

2002 Sep 27 05:30:45 EST -04:00 %SYS-4-PORT_WARN:Port 12/14 dmaTxFull (11568) dmaRetry (0) dmaLevel2Request (0)

2002 Sep 27 06:00:45 EST -04:00 %SYS-4-PORT_WARN:Port 6/2 dmaTxFull (54) dmaRetry (0) dmaLevel2Request (0)

Anyone know what exactly is going on here? The devices on these ports seem to be funtioning properly aside from the errors.

Any info would be greatly appreciated.

Thanks,

Nick

[Prashanth Krishnappa]

This means that the port is oversubscribed resulting in DMA queue being full and packets are dropped. Is there excessive traffic on these ports? You are seeing these messages as 6.3(6) has more diagnostic error reporting capabilities. If you wish you could disable this feature using "set errordetection portcounters disable"

[nyurkovich]

hmmm.... Looking in more detail on each port it seems as though they are all utilizing the same vlan, which is used only for Unix based workstations. Would this give any more insight.