On Tuesday, 05/13/2008 at 01:49 EDT, Marcy Cortes <[EMAIL PROTECTED]> wrote: > Hello, > > We're investigating the set up for vswitch in LACP mode. > We've discovered that unless you have a feature in your cisco switches > out there that make 2 of them appear to be one (something like feature > 1440 on the 6509), you have a single point of failure in your switch > hardware. > > There doesn't appear to be a way with the VSWITCH to have a failover > VSWITCH or OSA which is cabled to another physical switch out there. > Nor is it possbile to use NIC bonding on a virtual NIC pair in Linux to > achieve failover. > > Is this all correct or did we miss something?
When you specify the RDEV option with a GROUP, the VSWITCH will failover the port group to the OSA specified on the RDEV. The issue is one of bandwidth. Depending on how big the port group was an its utilization, the single OSA may not be able to handle it. Once you reach that point, you need to invest in the VSS 1440 technology. Anyone planning new switch purchases or upgrades should seriously look at this capability in the 6500 series. You are correct that CP does not virtualize link aggregation (LACP) on virtual NICs. Alan Altmark z/VM Development IBM Endicott
