
Chapter 23: Multiple Spanning Tree Protocol
510 Section IV: Spanning Tree Protocols
Figure 172 illustrates the same two AT-8524M switches and the same two
virtual LANs. But in this example, the two switches are running MSTP and
the two VLANs have been assigned to different spanning tree instances.
Both links remain active now that they reside in different MSTIs, enabling
the VLANs to forward traffic over their respective direct link.
Figure 172. MSTP Example of Two Spanning Tree Instances
LINK
MODE
LINK
MODE
FAULT
RPS
MASTER
PWR
MODE
STATUS
AT- 8524M
Fast Ethernet Switch
LINK
MODE
LINK
MODE
FAULT
RPS
MASTER
PWR
MODE
STATUS
AT- 8524M
Fast Ethernet Switch
Sales
VLAN in
MSTI 1
Production
VLAN in
MSTI 2
Untagged
Ports
Untagged
Ports
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