Users Guide

Related Commands
edge-port bpdulter default — 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
Congure the maximum hop count.
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
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information The max-hops command is a conguration 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 congured 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
Congure 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, use the no msti instance {vlan range | bridge-priority
priority} command.
Parameters
msti instance Enter the MSTP iInstance. The range is from zero (0) to 63.
vlan range Enter the keyword vlan then the identier range value. The range is from 1 to 4094.
bridge-priority
priority
Enter the keywords bridge-priority then a value in increments of 4096 as the
bridge priority. The range is from 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.
Defaults default bridge-priority is 32768.
Multiple Spanning Tree Protocol (MSTP) 879