Cisco 7604 User Manual

19-26
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 19 Configuring Standard-Compliant IEEE MST
Configuring MST
Configuring the Maximum-Aging Time
To configure the maximum-aging time for all MST instances, perform this task:
To return the router to its default setting, use the no spanning-tree mst max-age global configuration
command.
Configuring the Maximum-Hop Count
To configure the maximum-hop count for all MST instances, perform this task:
To return the router to its default setting, use the no spanning-tree mst max-hops global configuration
command.
Specifying the Link Type to Ensure Rapid Transitions
If you connect a port to another port through a point-to-point link and the local port becomes a
designated port, the RSTP negotiates a rapid transition with the other port by using the
proposal-agreement handshake to ensure a loop-free topology as described in the “Rapid Convergence”
section on page 19-11.
Command Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# spanning-tree mst max-age seconds
(Optional) Configures the maximum-aging time for all
MST instances. The maximum-aging time is the number
of seconds a router waits without receiving spanning-tree
configuration messages before attempting a
reconfiguration.
For seconds, the range is 6 to 40; the default is 20.
Step 3
Router(config)# end
Returns to privileged EXEC mode.
Step 4
Router# show spanning-tree mst
Verifies your entries.
Step 5
Router# copy running-config startup-config
(Optional) Saves your entries in the configuration file.
Command Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# spanning-tree mst max-hops
hop_count
(Optional) Specifies the number of hops in a region
before the BPDU is discarded, and the information held
for a port is aged.
For hop_count, the range is 1 to 255; the default is 20.
Step 3
Router(config)# end
Returns to privileged EXEC mode.
Step 4
Router# show spanning-tree mst
Verifies your entries.
Step 5
Router# copy running-config startup-config
(Optional) Saves your entries in the configuration file.

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English