Command Line Reference Guide

Multiple Spanning Tree Protocol (MSTP) | 669
Defaults
20 seconds
Command Modes
MULTIPLE SPANNING TREE
Command
History
Related
Commands
max-hops
c e s
Configure the maximum hop count.
Syntax
max-hops number
To return to the default values, enter no max-hops.
Parameters
Defaults
20 hops
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}
Version 8.3.5.0 Introduced on the S55.
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
forward-delay The amount of time the interface waits in the Blocking State and the Learning State
before transitioning to the Forwarding State.
hello-time Change the time interval between BPDUs.
range
Enter a number for the maximum hop count.
Range: 1 to 40
Default: 20
Version 8.3.5.0 Introduced on the S55.
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