3Com WX3000 Configuring VLAN-VPN Tunnel, Configuring VLAN-VPN tunnel, Vlan-vpn tunnel

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The rapid transition feature can be enabled on only root ports or alternate ports.

If you configure the rapid transition feature on a designated port, the feature does not take effect on the port.

Configuring VLAN-VPN Tunnel

Introduction

The VLAN-VPN Tunnel function enables STP packets to be transparently transmitted between geographically dispersed user networks through specified VLAN VPNs in operator’s networks, through which spanning trees can be generated across these user networks and are independent of those of the operator’s network.

As shown in Figure 1-9, the upper part is the operator’s network, and the lower part is the user’s network. The operator’s network comprises packet ingress/egress devices, and the user’s network has networks A and B. On the operator’s network, configure the arriving STP packets at the ingress to have MAC addresses in a special format, and reconvert them back to their original formats at the egress. This is how transparent transmission is implemented over the operator’s network.

Figure 1-9VLAN-VPN tunnel network hierarchy

Configuring VLAN-VPN tunnel

Follow these steps to configure VLAN-VPN tunnel:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enable MSTP globally	stp enable	—
Enable the VLAN-VPN		Required
	vlan-vpn tunnel	The VLAN-VPN tunnel function is disabled
tunnel function globally
		by default.
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