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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”
GVRP enabled.
3 Static VLANs:
– DEFAULT_VLAN
– VLAN-222
– VLAN-333
Switch “B”
GVRP enabled.
1 Static VLANs:
– DEFAULT_VLAN
Port 1: Set to
“Learn” Mode
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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