Virtual Private LAN Service
288
FD 100/320Gbps NT and FX NT IHub Services Guide
3HH-11985-AAAA-TQZZA Issue: 13
5.16.3.10 mst-port-priority
Table 192 mst-port-priority command
5.16.3.11 max-age
Table 193 max-age command
Description This commands specifies path-cost within a given instance, expressing probability that a given
port will be put into the forwarding state in case a loop occurs (the highest value expresses
lowest priority).
The no form of this command sets port-priority to its default value.
Default The path-cost is proportional to link speed.
Parameters inst-path-cost — Specifies the contribution of this port to the MSTI path cost of paths towards
the spanning tree regional root which include this port.
Values: 1 — 200000000
Item Description
(2 of 2)
Item Description
Syntax mst-port-priority stp-priority
no mst-port-priority
Context configure>service>vpls>sap>stp>mst-instance
Description This command indicates how many hops a BPDU can traverse the network starting from the
root bridge. The message age field in a BPDU transmitted by the root bridge is initialized to 0.
Each other bridge will take the message_age value from BPDUs received on their root port and
increment this value by 1. The message_age thus reflects the distance from the root bridge.
BPDUs with a message age exceeding max-age are ignored.
STP uses the max-age value configured in the root bridge. This value is propagated to the other
bridges via the BPDUs.
The no form of this command returns the max age to the default value.
Default 20
Parameters seconds — The maximum info age for the STP instance in seconds.
Values: 6 — 40
Item Description
Syntax max-age seconds
no max-age
Context configure>service>vpls>stp
(1 of 2)
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