Cisco Systems N3KC3064TFAL3 Configuring the Rapid PVST+ Forward Delay Time for a VLAN, Procedure

Configuring Rapid PVST+

Configuring the Rapid PVST+ Forward Delay Time for a VLAN

Configuring the Rapid PVST+ Forward Delay Time for a VLAN

You can configure the forward delay time per VLAN when using Rapid PVST+.

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# spanning-tree vlan	Configures the forward delay time of a VLAN. The
	vlan-range forward-timeforward-time	forward delay time value can be from 4 to 30
		seconds, and the default is 15 seconds.

This example shows how to configure the forward delay time for a VLAN:

switch# configure terminal

switch(config)# spanning-tree vlan 5 forward-time 21

Configuring the Rapid PVST+ Maximum Age Time for a VLAN

You can configure the maximum age time per VLAN when using Rapid PVST+.

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# spanning-tree vlan	Configures the maximum aging time of a VLAN.
	vlan-range max-agemax-age	The maximum aging time value can be from 6 to 40
		seconds, and the default is 20 seconds.

This example shows how to configure the maximum aging time for a VLAN:

switch# configure terminal

switch(config)# spanning-tree vlan 5 max-age 36

Specifying the Link Type

Rapid connectivity (802.1w standard) is established only on point-to-point links. By default, the link type is controlled from the duplex mode of the interface. A full-duplex port is considered to have a point-to-point connection; a half-duplex port is considered to have a shared connection.

If you have a half-duplex link physically connected point-to-point to a single port on a remote switch, you can override the default setting on the link type and enable rapid transitions.

Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)

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