stp timer hello

Use stp timer hello to set the hello time.

Use undo stp timer hello to restore the default.

Syntax

stp [ vlan vlan-id-list ] timer hello time

undo stp [ vlan vlan-id-list ] timer hello

Default

The hello time is 200 centiseconds.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

vlan vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN or a range of VLANs in the form of vlan-id1 [ to vlan-id2 ]. The value for vlan-id2 must be equal to or greater than the value for vlan-id1. The value range for the vlan-id argument is 1 to 4094. If you set the STP, RSTP, or MSTP hello time, do not specify this option.

time: Specifies the hello time in centiseconds, in the range of 100 to 1000 in increments of 100 (as in 100, 200, 300).

Usage guidelines

Hello time is the interval at which spanning tree devices send configuration BPDUs to maintain the spanning tree. If a device fails to receive configuration BPDUs within the set period of time, a new spanning tree calculation process is triggered.

As a best practice, do not 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. This command makes the spanning tree protocols automatically calculate the optimal settings for the hello timer. If the network diameter uses the default value, the hello timer also uses the default value.

Examples

# In MSTP mode, set the hello time to 400 centiseconds.

<Sysname> system-view
[Sysname] stp timer hello 400

# In PVST mode, set the hello time for VLAN 2 to 400 centiseconds.

<Sysname> system-view
[Sysname] stp vlan 2 timer hello 400

Related commands

stp bridge-diameter

stp timer forward-delay

stp timer max-age