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When a Trunk port is set as fixed, the port is not allowed to dynamically 
register/deregister a VLAN, it only propagates information about static VLANs 
that are manually configured instead of that of dynamic VLANs. That is, a Trunk 
port that is of fixed type only permits manually configured VLANs even you 
configure it to permit all VLANs.

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When an Ethernet port is set to be in forbidden registration mode, all the 
VLANs except VLAN1 will be deregistered and no other VLANs can be created 
and registered on this port.

Perform the following configuration in Ethernet port view.

By default, GVRP registration type is normal.

After the above configuration, execute the display command in any view to 
display the running of GVRP configuration, and to verify the configuration.

Execute the debugging command in user view to debug the configuration of 
GVRP.

To dynamically register and update VLAN information among switches, GVRP 
needs to be enabled on the switches.

Figure 17   GVRP configuration example

Configure Switch A:

# Enable GVRP globally.

Table 65   Set the GVRP registration type

Set GVRP registration type 

gvrp registration { normal | fixed | 
forbidden } 

Restore the default GVRP registration type 

undo gvrp registration

Table 66   Display and debug GVRP

Display GVRP statistics information 

display gvrp statistics [ interface 
interface-list ] 

Display GVRP global status information 

display gvrp status 

Enable GVRP packet or event debugging 

debugging gvrp { packet | event} 

Disable GVRP packet or event debugging 

undo debugging gvrp { packet | event }

E3/1/1

Switch A

Switch B

E4/1/1

Switch A

Switch B

E3/1/1

Switch A

Switch B

E4/1/1

Switch A

Switch B