Spanning-Tree Mst Max-Hops - Cisco Catalyst 2960 Command Reference Manual

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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands

spanning-tree mst max-hops

Use the spanning-tree mst max-hops global configuration command to set the number of hops in a

region before the bridge protocol data unit (BPDU) is discarded and the information held for an interface

is aged. Use the no form of this command to return to the default setting.

Syntax Description

The default is 20 hops.

Command Modes

Global configuration

Command History

Usage Guidelines

The root switch of the instance always sends a BPDU (or M-record) with a cost of 0 and the hop count

set to the maximum value. When a switch receives this BPDU, it decrements the received remaining hop

count by one and propagates the decremented count as the remaining hop count in the generated

M-records. A switch discards the BPDU and ages the information held for the interface when the count

Changing the spanning-tree mst max-hops command affects all spanning-tree instances.

This example shows how to set the spanning-tree max-hops to 10 for all multiple spanning-tree (MST)

Switch(config)# spanning-tree mst max-hops 10

You can verify your setting by entering the show spanning-tree mst privileged EXEC command.

spanning-tree mst max-hops hop-count

no spanning-tree mst max-hops

Number of hops in a region before the BPDU is discarded. The range is 1 to 255 hops.

Modification

This command was introduced.

The hop-count range changed to 1 to 255.

spanning-tree mst max-hops

Catalyst 2960 Switch Command Reference