3com 5500-ei pwr Installation Instruction

 

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z

 

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

z

 

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

 

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

As shown in 

, the upper part is the service provider network, and the lower part comprises the 

customer networks. The service provider network comprises packet input/output devices, and the 
customer network has networks A and B. On the service provider network, configure the arriving STP 
packets at the input device to have MAC addresses in a special format, and reconvert them back to their 
original formats at the output device. This is how transparent transmission is implemented over the 
service provider network. 

VLAN-VPN tunnel network hierarchy 

Network

Network A

Network B

Customer networks

Service provider network

Packet input/output 

device

Packet input/output 

device

 

 

Follow these steps to configure VLAN-VPN tunnel: 

Enter system view 

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Enable MSTP globally 

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