On 17/09/2010 16:52, Jay Nakamura wrote:
Some hosts/OS can do load balancing between NICs. If a host has two NICs connected to two switches,(the two switches are connected together) and load balancing between them, switch will see the same source MAC from two ports. How does a switch decide which ports to put in the forwarding table? Would it switch back and forth every time there is a packet? Is there any negative effect on the switch when that happens? Is this platform dependent?
Are you talking about Network Load Balancing (NLB) here? This is very hacky stuff which depends on switch port flooding and MAC address spoofing to operate correctly. I wouldn't be the world's greatest fan of this approach, to be honest.
http://blogs.technet.com/b/networking/archive/2008/05/15/preparing-the-network-for-nlb-2008.aspx
On switches, it's generally not hardware dependent. Nick _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
