R0106-HP MSR Router Series Layer 2 - LAN Switching Command Reference(V7)

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[Sysname] interface gigabitethernet 2/1/1
[Sysname-GigabitEthernet2/1/1] stp tc-restriction
stp timer forward-delay
Use stp timer forward-delay to set the forward delay timer.
Use undo stp timer forward-delay to restore the default.
Syntax
stp [ vlan vlan-id-list ] timer forward-delay time
undo stp [ vlan vlan-id-list ] timer forward-delay
Default
The forward delay timer is 1500 centiseconds.
Views
System view
Predefined user roles
network-admin
Parameters
vlan vlan-id-list: Sets the forward delay for the VLANs specified by a VLAN ID list. They are in the format
of vlan-id-list = { vlan-id [ to vlan-id ] }&<1-10>, where &<1-10> indicates that you can specify up to 10
vlan-id [ to vlan-id ] parameters. The value range for the vlan-id argument is 1 to 4094. If you set the STP,
RSTP, or MSTP forward delay, do not specify this option.
time: Sets the forward delay in centiseconds, in the range of 400 to 3000 in increments of 100 (as in
400, 500, 600).
Usage guidelines
The forward delay timer determines the time interval of state transition. To prevent temporary loops, a
spanning tree port goes through the learning (intermediate) state before it transits from the discarding
state to the forwarding state. To stay synchronized with the remote device, the port has a wait period that
is determined by the forward delay timer between transition states.
HP recommends not setting the forward delay 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 forward delay timer. If the
network diameter uses the default value, the forward delay timer also uses the default value.
Examples
# In MSTP mode, set the forward delay timer to 2000 centiseconds.
<Sysname> system-view
[Sysname] stp timer forward-delay 2000
# In PVST mode, set the forward delay timer for VLAN 2 to 2000 centiseconds.
<Sysname> system-view
[Sysname] stp vlan 2 timer forward-delay 2000
Related commands
• stp bridge-diameter
• stp timer hello