Stp Timer Hello - HP 3600 v2 Series Command Reference Manual

stp timer hello

Syntax
stp [ vlan vlan-list ] timer hello time
undo stp [ vlan vlan-list ] timer hello
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 hello time in 0.01 seconds, in the range of 100 to 1000 in increments of 100 (as in 100,
200, 300).
Description
Use stp timer hello to set the hello time of the device.
Use undo stp timer hello to restore the default.
By default, the hello time is 2 seconds.
Hello time is the time interval at which spanning tree devices send configuration BPDUs to maintain
spanning tree. If a device fails to receive configuration BPDUs within the set period of time, a new
spanning tree calculation process will be triggered due to timeout.
To set the hello time in STP/RSTP/MSTP mode, use this command without any VLAN specified. To set the
hello time 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 hello time 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 hello timer. If the network diameter uses the
default value, the hello timer also uses the default value.
Related commands: stp timer forward-delay, stp timer max-age, and stp bridge-diameter.
Examples
# In MSTP mode, set the hello time to 4 seconds.
<Sysname> system-view
[Sysname] stp timer hello 400
# In PVST mode, set the hello time in VLAN 2 to 4 seconds.
<Sysname> system-view
[Sysname] stp mode pvst
[Sysname] stp vlan 2 timer hello 400
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