> > > https://www.flexibilis.com/downloads/xrs/SpeedChip_XRS7000_3000_User_Manual.pdf Section 6.1.4 The forwarding decision is presented in Figure 19. Note that also frames coming into a disabled port are received to the buffer memory, but because their forwarding decision is not to forward them to any port, they are dropped. This behavior however can be changed, and frames can be forwarded from disabled ports to other ports by using Inbound Policy (see Chapter 6.1.5). Sounds promising. And Section 6.1.5: Inbound Policy checks the source and the destination MAC addresses of all the received frames. The user can configure through the register interface what kind of a treatment should frames with certain source or destination MAC addresses get. Many protocols use protocol specific multicast MAC addresses and the destination MAC address can therefore be used for forwarding those frames to CPU port and not to other ports. Looking at table 36, i think you can add a match for the BPDU destination MAC address, and have i forwarded to the CPU port. Looks like you can add 15 such filters. So you might want to think about how you want to use these, what other special packets do you want to allow through? Andrew
