Administrator Guide

Related
Commands
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 — changes the time interval between BPDUs.
max-hops
Configure the maximum hop count.
C9000 Series
Syntax
max-hops number
To return to the default values, use the no max-hops command.
Parameters
range Enter a number for the maximum hop count. The range is from 1 to 40. The default
is 20.
Defaults 20 hops
Command Modes MULTIPLE SPANNING TREE
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.1 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.5.1.0 Introduced.
Usage
Information
The max-hops command 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 reach
zero, the switch discards the BPDU and ages out any information that it holds for the port.
msti
Configure multiple spanning tree instance, bridge priority, and one or multiple VLANs mapped to the MST instance.
C9000 Series
Syntax
msti instance {vlan range | bridge-priority priority}
To disable mapping or bridge priority, use the no msti instance {vlan range | bridge-
priority priority} command.
Multiple Spanning Tree Protocol (MSTP) 1115