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I am getting 1% dropped packets on an interface. I've replaced everything and I can't figure out why. It will drop a bunch of packets at once, not a packet here and there. The logs showed this but didn't know if that meant anything?


Feb 21 13:41:42 STP: msti 0 set port 6 to learning
Feb 21 13:41:57 STP: msti 0 set port 6 to forwarding
Feb 21 14:05:24 STP: msti 0 set port 6 to discarding
Feb 21 14:05:38 STP: msti 0 set port 6 to learning
Feb 21 14:05:53 STP: msti 0 set port 6 to forwarding
Feb 21 15:07:15 STP: msti 0 set port 6 to discarding
Feb 21 15:07:29 STP: msti 0 set port 6 to learning
Feb 21 15:07:44 STP: msti 0 set port 6 to forwarding
Feb 21 16:09:05 STP: msti 0 set port 6 to discarding
Feb 21 16:09:20 STP: msti 0 set port 6 to learning
Feb 21 16:09:35 STP: msti 0 set port 6 to forwarding
Feb 21 17:10:56 STP: msti 0 set port 6 to discarding
Feb 21 17:11:10 STP: msti 0 set port 6 to learning
Feb 21 17:11:25 STP: msti 0 set port 6 to forwarding
Feb 21 18:12:46 STP: msti 0 set port 6 to discarding
Feb 21 18:13:01 STP: msti 0 set port 6 to learning
Feb 21 18:13:16 STP: msti 0 set port 6 to forwarding
Feb 21 18:54:00 STP: msti 0 set port 6 to discarding
Feb 21 18:54:14 STP: msti 0 set port 6 to learning
Feb 21 18:54:29 STP: msti 0 set port 6 to forwarding
Feb 21 19:55:50 STP: msti 0 set port 6 to discarding

Okay, looking at things closer it looks like the port starts discarding packets which lasts for about 14 seconds. Looking at the logs this seems to happen roughly every 40 minutes(2400 seconds). 14 packets out of 2400 would explain the 1% packet loss. Granted it's less but rounded up would give you the 1% reading.
Now I just need to figure out why it is discarding packets. There isn't a loop but could something else be causing this? Should I disable STP?

As long as there is no loop, disabling STP should be fine.

Possibly related:
viewtopic.php?f=17&t=6290&p=33166#p33166