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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
] }&<1-10>, where
the
vlan-id
argument represents the VLAN ID, in the range of 1 to 4094, and &<1-10>
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 is ineffective for 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.
Hewlett Packard Enterprise 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
stp timer-factor
Syntax
stp timer-factor factor
