I want to upgrade a pair of FWSMs acting in an active-standby arrangement from v3.2 to v4.0. The 6513 chassis are running 12.2(33)SXH code, which I don't want to have to upgrade aswell at this time. From what I can gather, 12.2(33)SXH will support the v4.0 code in the FWSM with the following limitations:
1. Route-Health injection (RHI) will not be supported (requires 12.2SXI)
2. VSS will not be supported (requires 12.2SXI)
3. Trusted Flow Acceleration (TFA) will not be supported (requires 12.2SXI)
Can someone please confirm this as correct and/or add any further limitations/caveats that they know of.