I'd like to confirm that this will work as expected. We are expanding our network. We plan to have a pair of 3825 routers with HWIC-9ESW switch cards installed, to use for distribution of traffic into actual 29xx and 35xx switches. The 9ESW has a VLAN database that restricts it to only recognizing 15 VLANs.
Our understanding is that this will not affect the distribution of VLAN traffic through the HWIC when ports are used as trunk ports -- only when used HWIC ports are for access. In other words, we could have 50 subnets and VLANs defined in the 3825 routers, connect the routers to downstream switches via 802.1q trunk ports on the HWIC-9ESW, and there would be no issue with those tagged packets transiting the HWIC intact and being distributed to the switched network. We believe this to be the case, but confirmation from real experience would be useful. Thanks.