The max-age 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 therefore 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 by the BPDUs.
The default value of max-age is 20. This parameter can be modified within a range of 6 to 40, limited by the standard STP parameter interaction formulas.
— config>service>vpls service-id# stp
— max-age max-info-age
Range: |
6 to 40 seconds |
Default: |
20 seconds |
Restore Default: |
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