FD 100/320Gbps NT and FX NT IHub Services Guide Virtual Private LAN Service
Issue: 13 3HH-11985-AAAA-TQZZA 293
5.16.3.20 port-num
Table 202 port-num command
5.16.3.21 priority
Table 203 priority command
Context configure>service>vpls>sap>stp
Description This command configures the Spanning Tree Protocol (STP) path cost for the SAP.
The SAP path cost is used by STP to calculate the path cost to the root bridge. The path cost
in BPDUs received on the root port is incremented with the configured path cost for that SAP.
When BPDUs are sent out other egress SAPs, the newly calculated root path cost is used.
These are the values used for CIST when running MSTP.
In the ISAM the STP path cost is a purely static configuration.
The no form of this command returns the path cost to the default value.
Default 10
Parameters path-cost — The path cost for the SAP.
Values: 1 — 65535 (1 is the lowest cost)
Item Description
(2 of 2)
Item Description
Syntax [no] port-num virtual-port-number
Context configure>service>vpls>sap>stp
Description This command configures the virtual port number which uniquely identifies an SAP within
configuration bridge protocol data units (BPDUs). The internal representation of an SAP is
unique to a system and has a reference space much bigger than the 12 bits definable in a
configuration BPDU. STP takes the internal representation value of an SAP and identifies it
with it’s own virtual port number that is unique to every other SAP defined on the TLS. The
virtual port number is assigned at the time that the SAP is added to the TLS. Since the order
that the SAP was added to the TLS is not preserved between reboots of the system, the virtual
port number may change between restarts of the STP instance.
The virtual port number cannot be administratively modified.
Item Description
Syntax priority bridge-priority
no priority
Context configure>service>vpls>stp
(1 of 2)
To Next Page
Loading...
