Configuring Restricted VLAN Registration

By default, restricted VLAN registration is disabled on a port. If restricted VLAN registration is enabled on a port, VLAN is learnt dynamically on that port, only if the specific VLAN is statically configured in the switch. When restricted VLAN registration rules are disabled, GVRP packets are processed normally and VLANs are learnt dynamically even if they are not statically configured in the switch. For Setup, refer to section Configuration Topology. In Switch A, P1 is configured to be member port of VLANs 2 and 3.

Execute the following commands in Switch A.

perform the following:

iSCom# configure terminal

Enable VLAN 2.

iSCom(config)# vlan 2

iSCom(config-vlan)# port gigabitethernet 0/1 untagged gigabitethernet 0/1

iSCom(config-vlan)# exit

iSCom(config)# vlan 3

iSCom(config-vlan)# port gigabitethernet 0/1 untagged gigabitethernet 0/1

Exit from the Interface Configuration Mode

iSCom(config-vlan)# end

Review the configuration in Switch A.

perform the following:

iSCom# show vlan

Vlan database

-------------

Vlan ID             : 1

Member Ports        : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Untagged Ports      : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Forbidden Ports     : None

Name                :

Status              : Permanent

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

Vlan ID             : 2

Member Ports        : Gi0/1

Untagged Ports      : Gi0/1

Forbidden Ports     : None

Name                :

Status              : Permanent

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

Vlan ID             : 3

Member Ports        : Gi0/1

Untagged Ports      : Gi0/1

Forbidden Ports     : None

Name                :

Status              : Permanent

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled----------------------------------------------------

check the output in Switch B:

iSCom# show vlan

Vlan database

-------------

Vlan ID             : 1

Member Ports        : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Untagged Ports      : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Forbidden Ports     : None

Name                :

Status              : Dynamic Gvrp

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

Vlan ID             : 2

Member Ports        : Gi0/1

Untagged Ports      : Gi0/1

Forbidden Ports     : None

Name                :

Status              : Dynamic Gvrp

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

Vlan ID             : 3

Member Ports        : Gi0/3

Untagged Ports      : Gi0/3

Forbidden Ports     : None

Name                :

Status              : Dynamic Gvrp

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled----------------------------------------------------

Execute the following commands in Switch B to enable restricted VLAN registration.
perform the following:
```
iSCom# configure terminal
```
- Enable Restricted VLAN registration on a port.
```
iSCom(config)# interface gigabitethernet 0/1
```
```
iSCom(config-if)# vlan restricted enable
```
```
iSCom(config-vlan)# end
```

View the configuration details after enabling the VLAN registration

iSCom# show vlan

Vlan database

-------------

Vlan ID             : 1

Member Ports        : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18                      Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24                      Ex0/1, Ex0/2, Ex0/3, Ex0/4

Untagged Ports      : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6                      Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18                      Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24                      Ex0/1, Ex0/2, Ex0/3, Ex0/4

Forbidden Ports     : None

Name                :

Status              : Permanent

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

Create VLAN 2 in Switch B.

perform the following:

iSCom# configure terminal

Create VLAN 2.

iSCom(config)# vlan 2

iSCom(config-vlan)# port gigabitethernet 0/2

Exit from the Interface Configuration Mode

iSCom(config-vlan)# end

View the configuration details in Switch B.

iSCom# show vlan

Vlan database

-------------

Vlan ID             : 1

Member Ports        : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Untagged Ports      : Gi0/1, Gi0/2, Gi0/3, Gi0/4, Gi0/5, Gi0/6

Gi0/7, Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12

Gi0/13, Gi0/14, Gi0/15, Gi0/16, Gi0/17, Gi0/18

Gi0/19, Gi0/20, Gi0/21, Gi0/22, Gi0/23, Gi0/24

Ex0/1, Ex0/2, Ex0/3, Ex0/4

Forbidden Ports     : None

Name                :

Status              : Permanent

Egress Ethertype    : 0x8100

Service Loopback Status   : Disabled

----------------------------------------------------

VLAN ID             : 2

Member Ports        : Gi0/1, Gi0/2

Untagged Ports      : None

Forbidden Ports     : None

Name                :

Status              : Permanent

Note: Since VLAN 2 is statically configured in Switch B, VLAN 2 is learnt dynamically on Port 1 of Switch B, even though restricted VLAN registration is enabled.