I have a large network experencing an issue.
Here are some details of the problem-
All active interfaces on all switches on the network have a high number of underruns and output buffer failures.
When problem occurs, test computer plugged into network experiences 100% cpu load.
Router freezes (linux based router).
All remote switches are 3550s. (C3550-I9Q3L2-M), Version 12.1(22)EA8a
Core switch is 6500, WS-X6K-S2U-MSFC2. (c6sup2_rp-PSV-M), Version 12.1(27b)E3
Star topology, all uplinks are 1gb.
1 VLAN
Network is pppoe based.
Broadcast storm control is enabled at a level of 10% on all 100mb access ports. (recent addition)
Any thoughts on what the issue could be? I had assumed it was some sort of broadcast storm, but network is still having the issue.
The problem is not consistant and will appear and disapear for short to long periods.
Below is output of an example interface :
-------
29914103 packets input, 3854413165 bytes, 0 no buffer
Received 277951 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 264622 multicast, 0 pause input
0 input packets with dribble condition detected
118378232 packets output, 2088884846 bytes, 281203864 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
281203864 output buffer failures, 0 output buffers swapped out 29914103 packets input, 3854413165 bytes, 0 no buffer
Received 277951 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 264622 multicast, 0 pause input
0 input packets with dribble condition detected
118378232 packets output, 2088884846 bytes, 281203864 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
281203864 output buffer failures, 0 output buffers swapped out
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Any thoughts are welcome, Thanks.
