Foundry Configuration Guide for the FESX, FSX, and FWSX
7 - 36 © Foundry Networks, Inc. December 2005
Ports 3/Switch 1 and Port5/Switch 1 are physically connected. Port5/Switch 1 received RST BPDUs that are
superior to those received on Port3/Switch 1; therefore, Port5/Switch 1 is given the Backup port role while Port3 is
given the Designated port role. Port3/Switch 1, does not go directly into a forwarding state. It waits until the
forward delay time expires twice on that port before it can proceed to the forwarding state.
Once convergence is achieved, the active Layer 2 forwarding path converges as shown in Figure 7.16.
Figure 7.16 Active Layer 2 Path
Port2
Root port
Port2
Designated
port
Port3
Designated
port
Port5
Backup port
Port4
Designated port
Port3
Designated
port
Port3
Alternate
port
Port4
Root port
Bridge priority = 1000
Bridge priority = 2000
Bridge priority = 1500
1Switch
Switch 2
Indicates the active Layer 2 path
Switch 3
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