If the iSCSI is not for VMware you can isolate it. If it is for VMware the Service Console must have access to the storage. If all the iSCSI devices can support Jumbo frames on this separate VLAN, performance generally improves and overhead decreas...
You might start by checking each of the ports involved in the path for errors, drops, etc. Clearing the counters on each before your next test might help see things. Do you get the same retransmission errors when running iperf? What about if you t...
If you stick with layer-2 then the easiest way is to trunk some VLANs on one link and the other VLANs on the other link so that the traffic loads are shared. You can set spanning tree to favor one over the other on a per-VLAN basis. That way if one...
Depending on what line cards you use there are a considerable number of issues with the specific bandwidth of the WS-X4548 and other GigE modules in the 45xx. Look here for some clues:http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/hardwar...
Hard to say as I do not know what all the processes do. you could try and hook up a packet analyzer that will capture data from say VLAN1 or some VLANS that the MSFC might see traffic from. Some packet storms/floods with specific types of addresses...
