Installation manual

3-172
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Note: All VLANs are automatically added to the IST (Instance 0).
To ensure that the MSTI maintains connectivity across the network, you must configure a
related set of bridges with the same MSTI settings.
Command Attributes
• MST Instance – Instance identifier of this spanning tree. (Default: 0)
• Priority – The priority of a spanning tree instance. (Range: 0-61440 in steps of 4096;
Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960,
45056, 49152, 53248, 57344, 61440; Default: 32768)
• VLANs in MST Instance – VLANs assigned to this instance.
• MST ID – Instance identifier to configure. (Range: 0-4094; Default: 0)
• VLAN ID – VLAN to assign to this selected MST instance. (Range: 1-4094)
The other global attributes are described under “Displaying Global Settings,” page 3-158. The attributes
displayed by the CLI for individual interfaces are described under “Displaying Interface Settings,”
page 3-165
Web – Click Spanning Tree, MSTP, VLAN Configuration. Select an instance identifier
from the list, set the instance priority, and click Apply. To add the VLAN members to an
MSTI instance, enter the instance identifier, the VLAN identifier, and click Add.
Figure 3-96 Configuring Multiple Spanning Trees
CLI – This example sets the priority for MSTI 1, and adds VLANs 1-5 to this MSTI.
Console(config)#spanning-tree mst configuration 4-223
Console(config-mst)#mst 1 priority 4096 4-224
Console(config-mstp)#mst 1 vlan 1-5 4-224
Console(config-mst)#