I'm trying to find some information relating to the over-subscription on the 8-port 10Gbps modules (e.g. WS-X4908-10GE) that are available for the 4900M. I've found that they have a 2:1 ratio, but cannot find out whether this is mapped port-to-port (i.e. port 1 and port 2 share the same), or whether this is actually the case. I recall long ago finding similar information for 10Gb interface on 6500 modules hence assume there is similar information relating tot the 4900 modules.
Can someone provide any information relating to this, I'm planning an installation where I'd be using 4 port of and 8 port module regularly, with the other 4 being redundant links and want uncontented throughput on the regular ports.