Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 288)

FIGURE 52 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.
802.1W convergence in a simple topology
The examples in this section illustrate how 802.1W convergence occurs in a simple Layer 2 topology
at start-up.
NOTE
The remaining examples assume that the appropriate handshake mechanisms occur as port roles and
states change.
802.1W convergence in a simple topology
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