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12 Posts
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15665
April 23rd, 2013 07:00
Powerconnect 3424 100% cpu
I am having an issue when we plug our 3424 into another switch in that the 3424 cpu goes to 100% and stays there till a power cycle. The weird thing is that it does not affect traffic on the switch. We have 5 vlans and they all pass traffic with consistently low pings and no dropped packets. But when I try to ping the switch IP address it will have one ping at <1ms and the next ping will be anywhere from 5ms to 700ms. So the ping to the switch IP goes low ping, high ping, low ping, high ping......... The switch web management page will come up but nothing loads except the menu on the left due to the high cpu load. I have tried turning on spanning-tree although the switches are only connected by the one cable with the same results. The switch we are connecting to is a Brocade FGS624P. The cpu usage on the Brocade switch is not affected. The 3424 switch firmware is at 2.0.0.21. Any insight to this would be appreciated.
bobu2
12 Posts
0
April 24th, 2013 07:00
Got the switch updated to the latest firmware and the issue is still there. I had a chance to run some packet captures and seen some interesting results. The dell switch when connected to the Brocade switch causes the Brocade to start sending the Dell thousands of STP packets per second which causes the 100% cpu problem. I checked the config and everything looks right on the Brocade. The Brocade is connected to 4 other switches which are Brocade as well and we don't have this issue. Only when we plug in the Dell switch does this happen and it only affects the Dell switch.