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Table 33 Command output
Field Description
Port Port name.
Receive Number of TC/TCN BPDUs received on each port.
Send Number of TC/TCN BPDUs sent by each port.
instance
Use instance to map a list of VLANs to an MSTI.
Use undo instance to remap the specified VLAN or all VLANs to the CIST (MSTI 0).
Syntax
instance instance-id vlan vlan-id-list
undo instance instance-id [ vlan vlan-id-list ]
Default
All VLANs are mapped to the CIST.
Views
MST region view
Predefined user roles
network-admin
Parameters
instance-id: Specifies an MSTI ID in the range of 0 to 4094. A value of 0 represents the CIST. The
value range for the instance-id argument is 1 to 4094 for the undo instance command.
vlan vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a
VLAN or a range of VLANs in the form of vlan-id1 [ to vlan-id2 ]. The value for vlan-id2 must be equal
to or greater than the value for vlan-id1. The value range for the vlan-id argument is 1 to 4094.
Usage guidelines
CAUTION:
Use caution with global Digest Snooping in the following situations:
• When you modify the VLAN-to-instance mappings.
• When you restore the default MST region configuration.
If the local device has different VLAN-to-instance mappings than its neighboring devices, loops or
traffic interruption will occur.
If you specify no VLAN in the undo instance command, all VLANs mapped to the specified MSTI
are remapped to the CIST.
You cannot map the same VLAN to different MSTIs. If you map a VLAN that has been mapped to an
MSTI to a new MSTI, the old mapping is automatically removed.
You can configure VLAN-to-instance mapping for up to 65 MSTIs.
After configuring this command, run the active region-configuration command to activate the
VLAN-to-instance mapping.
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