ECS4100 Series CLI Reference Guide-R07

Chapter 22 | Spanning Tree Commands
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spanning-tree
restricted-tcn
This command prevents a TCN from being propagated from an aggreation switch
to the uplink port on access switches. Use the no form to restore the default setting.
Syntax
[no] spanning-tree restricted-tcn
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Commnad Usage
This command prevents an aggregation switch from propagating Topology
Change Notifications (TCNs), from to the uplink port on access switches. In other
words, TCNs are filtering on all neighboring ringes attached to access switches.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree restricted-tcn
spanning-tree
mst cost
This command configures the path cost on a spanning instance in the Multiple
Spanning Tree. Use the no form to restore the default auto-configuration mode.
Syntax
spanning-tree mst instance-id cost cost
no spanning-tree mst instance-id cost
instance-id - Instance identifier of the spanning tree. (Range: 0-4094)
cost - Path cost for an interface. (Range: 0 for auto-configuration, 1-65535
for short path cost method
12
, 1-200,000,000 for long path cost method)
The recommended path cost range is listed in Table 103 on page 535.
Default Setting
By default, the system automatically detects the speed and duplex mode used on
each port, and configures the path cost according to the values shown in Table 104.
Path cost “0” is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w
standard exceeds 65,535, the default is set to 65,535. The default path costs are
listed in Table 104 on page 536.
Command Mode
Interface Configuration (Ethernet, Port Channel)
12. Use the spanning-tree pathcost method command to set the path cost method.