FTOS Configuration Guide for the C-Series - Force10 Networks

To change the region name or revision:
Task Command Syntax Command Mode
Change the region name. name name PROTOCOL
MSTP
Change the region revision number.
• Range: 0 to 65535
• Default: 0
View the current region name and revision using the command show spanning-tree mst configuration
from EXEC Privilege mode, as shown in Figure 305.
Figure 305 Viewing the MSTP Region Name and Revision
R1(conf-mstp)#name my-mstp-region
R1(conf-mstp)#exit
R1(conf)#do show spanning-tree mst config
MST region name: my-mstp-region
Revision: 0
MSTI VID
1 100
2 200-300
Modify Global Parameters
The root bridge sets the values for forward-delay, hello-time, max-age, and max-hops and overwrites the
values set on other MSTP bridges.
• Forward-delay is the amount of time an interface waits in the Listening State and the Learning State
before it transitions to the Forwarding State.
• Hello-time is the time interval in which the bridge sends MSTP Bridge Protocol Data Units (BPDUs).
• Max-age is the length of time the bridge maintains configuration information before it refreshes that
information by recomputing the MST topology.
• Max-hops is the maximum number of hops a BPDU can travel before a receiving switch discards it.
To change MSTP parameters, use the following commands on the root bridge:
revision number PROTOCOL
MSTP
Note: Force10 Networks recommends that only experienced network administrators change MSTP
parameters. Poorly planned modification of MSTP parameters can negatively impact network performance.
Task Command Syntax Command Mode
Change the forward-delay parameter.
• Range: 4 to 30
• Default: 15 seconds
forward-delay seconds PROTOCOL
MSTP
424 Multiple Spanning Tree Protocol