Other stuff..., Switching

Port-channel Cisco vs. VMware ESX

René Jorissen on April 4, 2008 5 Comments • Tags: #balancing #dst #esx #esxtop #etherchannel #ip #lacp #load #loadbalancing #mac #portchannel #src #srcdstip #srcmap

I have had different discussions with different customers about the load-balancing algorithms between a Cisco switch, configured with a port-channel and a VMware ESX server using multiple NICs. Our VMware consultants always choose Route based on IP hashes as load-balancing algorithm. This means that load-balancing happens on layer 3 of the OSI model (source-destination-IP). In … Read More

Switching

ProCurve excessive STP topology changes

René Jorissen on March 25, 2008 2 Comments • Tags: #3500 #3500yl #5412 #5412zl #changes #mst #rstp #topology

Recently a colleque of mine noticed something strange in the STP configuration from a couple of HP ProCurve switches. He had a network, which was configured by another party, with switches running MST en RSTP mode spanning-tree. He noticed a lot of topology changes in the configuration, but couldn’t find out where they were coming … Read More