Stp Timer Max-Age - HP 3600 v2 Series Command Reference Manual

stp timer max-age

Syntax
stp [ vlan vlan-list ] timer max-age time
undo stp [ vlan vlan-list ] timer max-age
View
System view
Default level
2: System level
Parameters
vlan vlan-list: Specifies a VLAN list in the format of vlan-list = { vlan-id [ to vlan-id ] }&<1- 1 0>, where the
vlan-id argument represents the VLAN ID, in the range of 1 to 4094, and &<1- 1 0> indicates that you can
specify up to 10 VLAN IDs or VLAN ID ranges.
time: Sets the max age in 0.01 seconds, in the range of 600 to 4000 in increments of 100 (as in 600,
700, 800).
Description
Use stp timer max-age to set the max age timer of the device.
Use undo stp timer max-age to restore the default.
By default, the max age is 20 seconds.
In the CIST of an MSTP network or each VLAN of a PVST network, the device determines whether a
configuration BPDU received on a port has expired based on the max age timer. If yes, a new spanning
tree calculation process starts. The max age timer does not take effect on MSTIs.
To set the max age timer in STP/RSTP/MSTP mode, use this command without any VLAN specified. To
set the max age timer for a specific VLAN or multiple VLANs in PVST mode, use this command with a
VLAN list specified.
HP does not recommend that you set the max age timer with this command. Instead, you can specify the
network diameter of the switched network by using the stp bridge-diameter command and let spanning
tree protocols automatically calculate optimal settings of the max age timer. If the network diameter uses
the default value, the max age timer also uses the default value.
Related commands: stp timer forward-delay, stp timer hello, and stp bridge-diameter.
Examples
# In MSTP mode, set the max age timer to 10 seconds.
<Sysname> system-view
[Sysname] stp timer max-age 1000
# In PVST mode, set the max age timer in VLAN 2 to 10 seconds.
<Sysname> system-view
[Sysname] stp mode pvst
[Sysname] stp vlan 2 timer max-age 1000
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