Dell PowerConnect FCS624S Configuration Guide - Page 282

8 Configuring STP related features FIGURE 34 New root bridge sending a proposal flag Switch 100 Port1 Handshake Completed Port2 Root port Proposing Port1 Root port Forwarding Port2 Switch 200 Port3 Port4 Designated port Proposed Port2 Designated port Switch 60 Port4 Designated port Proposing RST BPDU sent with a Proposing flag Port2 Switch 300 Port3 Switch 400 • Sync and Reroot - The Root port then asserts a sync and a reroot signal on all the ports on the bridge. The signal tells the ports that a new Root port has been assigned and they are to renegotiate their new roles and states. The other ports on the bridge assert their sync and reroot signals. Information about the old Root port is discarded from all ports. Designated ports change into discarding states (Figure 35). 240 PowerConnect B-Series FCX Configuration Guide 53-1002266-01