Quick Reference Guide

122 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring STP related features
6
• Synced and Agree – When all the ports on the bridge assert their synced signals, the new Root
port asserts its own synced signal and sends an RST BPDU to Port4/Switch 60 that contains
an agreed flag (Figure 12). The Root port also moves into a forwarding state.
FIGURE 13 Rerooted, synced, and agreed
The old Root port on Switch 200 becomes an Alternate Port (Figure 14). Other ports on that bridge
are elected to appropriate roles.
BigIron
Switch 100
Port2
Designated
port
Switch 60
Port4
Designated port
Forwarding
Port 2
Root port
Port1
Proposing
Port1
Rerooted
Synced
Discarding
Port4
Root port
Rerooted
Synced
Forwarding
Port3
Rerooted
Synced
Discarding
Port2
Rerooted
Synced
Discarding
Port2
Port3
Switch 300
Indicates a signal
Switch 200
Switch 400
RST BPDU
sent with
an Agreed
flag