On Tue, 2003-07-22 at 12:50, David Boyes wrote: > Doesn't really solve the same problem, Adam. You're still limited to the > maximum bandwith of a single adapter; equal-cost routing and the other layer > 3 solutions just decide which one to use.
I don't think so: equal-cost-multipath lets you split traffic to the same destination across multiple links, and therefore (with help from the router at the other end) aggregate your bandwidth across them. It's explicitly been added to the VM stack to do load balancing. You can do it with either OSPF or static routing on the VM side, and can use up to four equal-cost links. EtherChannel is certainly a nicer solution, I'll grant, and doesn't top out at 4Gb. > Etherchannel support allows you to > bind the adapters in such a way that they appear to be a single layer 2 > entity with a bandwidth equal to the sum of the bandwidth of the individual > adapters. It's nice. > > Given the low physical density of S390 network adapters, this would be a > Very Good Thing, at least until 10 Gbit Ethernet is widely available. Now > that the qeth and QDIO drivers are open-source, we might be able to do > something about the lack of Etherchannel support. I'll have a look later > this evening.
