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Configuring Spanning Tree Protocol (STP) and IronSpan Features
December 2005
© Foundry Networks, Inc.
7 - 33
Figure 7.13
Handshake Completed After Election of New Root Port
Recall that Switch 200 sent the agreed flag to Port4/Switch 60 and not to Port1/Switch 100 (the port that connects
Switch 100 to Switch 200). Therefore, Port1/Switch 100 does not go into forwarding state instantly. It waits until
two instances of the forward delay timer expires on the port before it goes into forwarding state.
At this point the handshake between the Switch 60 and Switch 200 is complete.
The remaining bridges (Switch 300 and Switch 400) may have to go through the reroot handshake if a new Root
port needs to be assigned.
Switch 400
Switch 300
Port1
Port1
Alternate port
Port2
Port2
Port3
Port3
Switch 60
Port4
Designated port
Port2
Designated
port
Port2
Root port
Port4
Root port
Proposing
Proposing
Port2
Proposing
Switch 100
Switch 200
Summary of Contents for FastIron Edge Switch X424
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