High CPU load on 4506Sup IV - What is PM Callback?
We have two 4506 chassis's on our campus network and are seeing high CPU loads. We are running 12.2.25EWA12 code (just upgraded from EWA11) and the load on our core1 switch is ~65-70%, with the core2 switch at about 45-50%.
The odd thing is that when we reloaded core1, then core2, the cpu load shifted to core2. We run STP and HSRP, but standby groups are working fine (core 1 active for all instances/groups) and no STP loops show (topologies are stable).
In looking at the CPU processes (show process cpu | exc 0.00) the following main items are consuming the CPU:
Re: High CPU load on 4506Sup IV - What is PM Callback?
There is no much information available about PM. As far I know PM process is invoked whenever a New VLAN is cretaed . Becuase spanning is created for each VLAN instance. This takes lot of CPU for multiple VLANs.
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interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
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Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
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