Spantree Vlan Path-Cost - Alcatel-Lucent 060321-10, Rev. B Cli Reference Manual

spantree vlan path-cost

spantree vlan path-cost
Configures the Spanning Tree path cost value for a port or a link aggregate of ports for the specified
VLAN instance. This value is the contribution of this port to the path cost towards the Spanning Tree root
bridge that includes this port. Path cost is a measure of the distance of the listed port from the root bridge
in the number of hops.
spantree vlan vlan_id {port slot/port[-port2] | linkagg linkagg_id [-linkagg_id2]} path-cost path_cost
Syntax Definitions
vlan_id
slot/port[-port2]
linkagg_id[-linkagg_id2]
path_cost
Defaults
By default, the path cost is set to zero.
Platforms Supported
OmniSwitch 10K
Usage Guidelines
•
This command only applies to the specified VLAN instance regardless of which operating mode (flat
or per-VLAN) is active for the switch.
•
If the switch is running in the flat mode when this command is used, the specified path cost for the port
is not active for the specified VLAN instance until the operating mode for the switch is changed to the
per-VLAN mode.
•
Note that when the Spanning Tree protocol is changed to/from MSTP, the bridge priority and port path
cost values for the flat mode CIST instance are reset to their default values.
•
Use the spantree path-cost-mode
active Spanning Tree protocol (16-bit for STP and RSTP, 32-bit for MSTP) or to use a 32-bit path cost
value regardless of which protocol is active.
•
If a 32-bit path cost value is in use and the path_cost is set to zero, the following IEEE 892.1S
recommended default path cost values based on link speed are used:
Link Speed
Recommended Value
10 MB
100 MB
page 5-44
An existing VLAN ID number.
The slot number and port number of the physical port. Use a hyphen to
specify a range of ports (4/1-8).
The link aggregate ID number. Use a hyphen to specify a range of IDs
(10-20).
Path cost value. The valid range is 0 - 65535 for 16-bit, 0–200000000
for 32-bit.
command to automatically select the path cost value based on the
IEEE 802.1D
2,000,000
200,000
Distributed Spanning Tree Commands
OmniSwitch CLI Reference Guide March 2011