Modify Global Parameters - Dell Force10 C150 Configuration Manual

To change the region name or revision:
Task
Change the region name.
Change the region revision number.
• Range: 0 to 65535
• Default: 0
View the current region name and revision using the command
EXEC Privilege mode, as shown in
Figure 29-6. Viewing the MSTP Region Name and Revision
FTOS(conf-mstp)#name my-mstp-region
FTOS(conf-mstp)#exit
FTOS(conf)#do show spanning-tree mst config
MST region name: my-mstp-region
Revision: 0
MSTI
1
2

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.
Note: Dell Force10 recommends that only experienced network administrators change MSTP parameters.
Poorly planned modification of MSTP parameters can negatively impact network performance.
To change MSTP parameters, use the following commands on the root bridge:
Task
Change the forward-delay parameter.
• Range: 4 to 30
• Default: 15 seconds
648 | Multiple Spanning Tree Protocol
VID
100
200-300
Command Syntax
name name
revision number
Figure 29-6.
Command Syntax
forward-delay seconds
Command Mode
PROTOCOL MSTP
PROTOCOL MSTP
show spanning-tree mst configuration
Command Mode
PROTOCOL MSTP
from