hostname "SW1"
vlan 100,300
vlan active
gvrp enable
interface vlan 300
ip address 10.100.0.1 255.255.255.0
interface gigabitethernet 1/0/28
switchport general allowed vlan add 100,300
gvrp enable
vlan database
vlan 100
exit
gvrp enable
interface gigabitethernet1/0/1
gvrp enable
switchport mode trunk
switchport trunk allowed vlan add 100
exit
interface gigabitethernet1/0/2
gvrp enable
switchport mode trunk
switchport trunk allowed add 100
exit
hostname "SW3"
vlan 100,300
vlan active
gvrp enable
interface vlan 300
ip address 10.100.0.2 255.255.255.0
interface gigabitethernet 1/0/23
switchport general allowed vlan add 100,300
gvrp enable
SW2#show vlan
Vlan database
-------------
Vlan ID : 100
Member Ports : gi 1/0/27, gi 1/0/28
Untagged Ports : None
Forbidden Ports : None
Name :
Status : Permanent
Egress Ethertype : 0x8100
Service Loopback Status : Disabled
Vlan ID : 300
Member Ports : gi 1/0/27, gi 1/0/28
Untagged Ports : None
Forbidden Ports : None
Name :
Status : Dynamic Gvrp
Egress Ethertype : 0x0
Service Loopback Status : Disabled
delete startup-config
reload