I did some research on cisco site. I can't find enough material to help me complete the design. Basically, I have several ips and I want to start to convert them from promiscuous mode to inline mode. For example, I have one span session from 6500 to ips 4235, then block connection on layer 3 interface. I can't insert ips between my core 6500 to distribute 6500 because the physical type interface is different and the inline limitation speed on the model. I can't figure it out how is it possible to do inline vlan pair, since most of the stuffs are connected to 6500 directly. Has anyone done this before? Any sample diagram out there? Thank you so much.