Port-Based Virtual LANs (VLANs) and GVRP

GVRP

Displaying the Static and Dynamic VLANs Active on the Switch. The show vlans command lists all VLANs present in the switch.

Syntax: show vlans

For example, in the following illustration, switch “B” has one static VLAN (the default VLAN), with GVRP enabled and port 1 configured to Learn for Unknown VLANs. Switch “A” has GVRP enabled and has three static VLANs: the default VLAN, VLAN-222, and VLAN-333. In this scenario, switch B will dynamically join VLAN-222 and VLAN-333:

Switch “A”

 

 

 

Switch “B”

GVRP enabled.

 

 

 

GVRP enabled.

 

 

 

3 Static VLANs:

 

 

 

1 Static VLANs:

 

Port 1: Set to

 

DEFAULT_VLAN

 

 

– DEFAULT_VLAN

VLAN-222

 

“Learn” Mode

 

 

 

 

 

 

VLAN-333

 

 

 

 

 

 

 

 

 

 

The show vlans command lists the dynamic (and static) VLANs in switch “B” after it has learned and joined VLAN-222 and VLAN-333.

Dynamic VLANs Learned from Switch “A” through Port 1

Figure 11-31. Example of Listing Showing Dynamic VLANs

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