R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Command Reference

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Views
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Predefined user roles
network-admin
Usage guidelines
When TC-BPDU transmission restriction is enabled on a port, the port does not send TC-BPDUs to the
other ports, and it does not delete the MAC address entries.
When the setting is configured in Layer 2 Ethernet interface view, it takes effect only on that interface.
When the setting is configured in Layer 2 aggregate interface view, it takes effect only on the aggregate
interface.
When the setting is configured on a member port in an aggregation group, it takes effect only after the
port leaves the aggregation group.
Examples
# Enable TC-BPDU transmission restriction on Ten-GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] stp tc-restriction
stp timer forward-delay
Use stp timer forward-delay to set the forward delay timer of the device.
Use undo stp timer forward-delay to restore the default.
Syntax
stp timer forward-delay time
undo stp timer forward-delay
Default
The forward delay timer is 1500 centiseconds.
Views
System view
Predefined user roles
network-admin
Parameters
time: Sets the forward delay in centiseconds. The value range is 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
between transition states that is determined by the forward delay timer.
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 and let the spanning tree