Building Enterprise WLAN Solutions 8-41
MSTP is an ideal spanning-tree implementation. With MSTP, you do not need to create an STP instance for each VLAN. MSTP runs on top of RSTP and therefore ideal within Motorola’s wireless redundancy architecture. When one distribution switch fails, it’s good to have each AP connected through the distribution switch immediately re-routed through the redundant distribution switch. In the following illustration, forwarding and blocking states are accounted for in normal operation:
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Distribution Layer
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F Access Layer
Adopted to RFS7000_1
Adopted to RFS7000_2
Adopted to RFS7000_1
Adopted to RFS7000_2
Adopted to RFS7000_1
Adopted to RFS7000_2
The following illustrates a network's traffic path when one of the distribution switches is down: