Modify Global Parameters - Dell Force10 S4810P Configuration Manual

For a bridge to be in the same MSTP region as another , all three of these qualities must match exactly. The
default values for name and revision will match on all Dell Force10 FTOS equipment. If you have
non-FTOS equipment that will participate in MSTP, ensure these values to match on all the equipment.
Note: Some non-FTOS equipment may implement a non-null default region name. SFTOS, for example,
uses the Bridge ID, while others may use a MAC address.
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 32-6. 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.
698
| Multiple Spanning Tree Protocol (MSTP)
VID
100
200-300
Command Syntax
name name
revision number
Figure 32-6.
Command Mode
PROTOCOL MSTP
PROTOCOL MSTP
show spanning-tree mst configuration
from