Brocade Multi-Service IronWare Switching Configuration Gui Uživatelský manuál stáhnout pdf (Strana 529)

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Multi-Service IronWare Switching Configuration Guide 499

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MRP Phase 2

Flow when a link breaks

Referring to Figure 123 if the link between S1 and S2 fails, the secondary interface on the ring 1

master node changes to a forwarding state.

The RHPs from the master for ring 2 reach S2 and a copy of the RHP is forwarded out of e 2/1. This

RHP traverses the ring 1 master and continues around ring 1 until it reaches S1. After S1 the RHP

is back on ring 2 and is finally received by the master for ring 2 which keeps its secondary interface

in blocking mode.

It should now be clear how the flow of lower priority RHPs over the higher priority ring ensure that

both ring masters do not transition to forwarding and create a loop condition.

FIGURE 123 Flow of RHP packets when a link for shared interfaces breaks

Ring 2 RHPs follow this path until the link is restored. Once the link is restored the ring 1 master will

transition its secondary ring interface to blocking and the ring 2 RHP flow is as shown in

Figure 122.

NOTE

There should always be a layer 2 protocol configured in the default vlan when MRP is configured with

all dual mode ports.

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