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Ethernet Switches & Routers

Occasional Contributor
Posts: 6
Registered: ‎10-12-2013

Very high usage on stack ports leading to very high cpu usage


We have a stack of 3 6430 switches and their TX/RX utilization is impressively high, like 1 million packets in 2 minutes on each port (we have a ringed stack using 2 ports on each unit, so it's 3x2 ports).

For example, in 3 hours : 881 071 912 packets have been sent through one stacking port. Yes : 800 millions in 3 hours.

The cpu usage is also very very high (98%). It seems that we have a loop or something. But every ethernet port doesn't show high utilization. Only the stack ports are transmitting a lot of packets.

We are using the firmware version 7.4.

Any idea on how to fix this ?

Thank you,


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