Dell PowerConnect B-RX Configuration Manual page 445

FIGURE 48
Switch 300
•
BigIron RX Series Configuration Guide
53-1002253-01
New root bridge sending a proposal flag
Switch 100
Proposing
Switch 200
Port2
Port2
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
Handshake
Completed
Port2
Root port
Port1
Port1
Root port
Forwarding
Port4
Designated port
Port3
Proposed
Port3
Switch 400
(Figure 49).
State machines
Port2
Designated
port
Port4
Designated port
Proposing
RST BPDU
sent with
a Proposing
flag
13
Switch 60
369