Command Reference Guide

992 | Multiple Spanning Tree Protocol (MSTP)
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Command Modes
MULTIPLE SPANNING TREE
Command
History
Usage
Information
The max-hops is a configuration command that applies to both the IST and all MST instances
in the MSTP region. The BPDUs sent out by the root switch set the remaining-hops parameter
to the configured value of max-hops. When a switch receives the BPDU, it decrements the
received value of the remaining hops and uses the resulting value as remaining-hops in the
BPDUs. If the remaining-hops reaches zero, the switch discards the BPDU and ages out any
information that it holds for the port.
msti
c e s
Configure Multiple Spanning Tree instance, bridge priority, and one or multiple VLANs
mapped to the MST instance.
Syntax
msti instance {vlan range | bridge-priority priority}
To disable mapping or bridge priority
no msti instance {vlan range | bridge-priority priority}
Parameters
Defaults
default bridge-priority is 32768
Command Modes
INTERFACE
Command
History
Usage
Information
By default, all VLANs are mapped to MST instance zero (0) unless you use the vlan range
command to map it to a non-zero instance.
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
Version 6.5.1.0 Introduced
msti instance Enter the Multiple Spanning Tree Protocol Instance
Range: zero (0) to 63
vlan range Enter the keyword vlan followed by the identifier range value.
Range: 1 to 4094
bridge-priority priority Enter the keyword bridge-priority followed by a value in
increments of 4096 as the bridge priority.
Range: zero (0) to 61440
Valid priority values are: 0, 4096, 8192, 12288, 16384, 20480,
24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344,
and 61440. All other values are rejected.
Version 8.3.7.0 Introduced on S4810
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
pre-Version 6.2.1.1 Introduced on E-Series