My question is, does supervisor engine with CatOS support L3 switching?
I was compare images CatOS and IOS and saw that common feature in both of them have IP Multilayer switching (IP MLS).
What that mean?
On the supervisor engine there is a PFC (Policy Feature Card) and an MSFC (Multilayer Switch Feature Card).
Among other things the PFC is repsonsible for the L2 and L3 forwarding of data.
The MSFC is repsonsible for establishing routing tables, creating the CEF table (CEF having replaced MLS as such) and pushing this down to the PFC. The MSFC is generally not responsible for forwarding data but without it there would be no layer 3 forwarding information for the PFC to use.
You can run a 6500 in two modes
1) Native mode - where IOS is used to configure both the l2 and L3 features.
2) Hybrid mode - where CatOS is used on the supervisor engine for forwarding data, QOS etc. and IOS is used on the MSFC for the establishement of forwarding tables etc.
So in summary a supervisor with CatOS cannot do L3 switching. Please see the attached link on the architecture of the 6500 for more details:-