Brocade Multi-Service IronWare Switching Configuration Gui Bedienungsanleitung PDF herunterladen (Seite 452)

422 Multi-Service IronWare Switching Configuration Guide

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State machines

The old Root port on Switch 200 becomes an Alternate Port (Figure 84). Other ports on that bridge

are elected to appropriate roles.

The Designated port on Switch 60 goes into a forwarding state once it receives the RST BPDU with

the agreed flag.

FIGURE 84 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.

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