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Configuring an S-VLAN Subinterface
Tasks to configure a S-VLAN subinterface include:
Configuring an S-VLAN Subinterface
To configure an S-VLAN subinterface:
- Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit
Ethernet port.host1(config)#interface fastEthernet 4/0
- Specify VLAN as the encapsulation method.host1(config-if)#encapsulation vlan
The VLAN major interface is added.
- Create a VLAN subinterface by adding a subinterface number
to the interface identification command.host1(config-if)#interface fastEthernet 4/1.1
- Assign an S-VLAN ID and a VLAN ID for the subinterface.host1(config-if)#svlan id 4 255
- Assign an S-VLAN Ethertype.host1(config-if)#svlan ethertype 88a8
Configuring PPPoE over an S-VLAN
To configure PPPoE over an S-VLAN over an Ethernet interface:
- Specify a Fast Ethernet, Gigabit Ethernet,
or 10-Gigabit Ethernet port.host1(config)#interface fastEthernet 4/0
- Specify VLAN as the encapsulation method.host1(config-if)#encapsulation vlan
The VLAN major interface is added.
- Create a VLAN subinterface by adding a subinterface number
to the interface identification command.host1(config-if)#interface fastEthernet 4/1.1
- Assign an S-VLAN ID and a VLAN ID for the subinterface.host1(config-if)#svlan id 4 255
- Assign an S-VLAN Ethertype.host1(config-if)#svlan ethertype 88a8
- Specify PPPoE as the encapsulation method on the interface.host1(config-if)#pppoe
- Create a PPPoE subinterface.host1(config-if)#pppoe subinterface fastEthernet 4/1.1.1
- Specify PPP as the encapsulation method on the interface.host1(config-if)#encapsulation ppp
- Assign an IP address and mask.host1(config-if)#ip address 164.10.6.61 255.255.255.0
- (Optional) Configure additional PPPoE subinterfaces by completing Steps 7 through 9 using unique numbering.
Figure 18 shows one S-VLAN subinterface with multiple PPPoE subinterface stacks.
 | Note: Before you can remove an S-VLAN/VLAN subinterface, you must remove the upper-layer interface stack. |
Figure 18: Example of PPPoE over S-VLAN Stacking Configuration Procedure
encapsulation ppp
- Use to configure PPP as the encapsulation method for the interface.
- Use the no version to remove PPP as the encapsulation method on the interface.
- See encapsulation ppp.
encapsulation vlan
- Use to configure VLAN as the encapsulation method for the interface.
- Use the no version to remove VLAN as the encapsulation method on the interface.
- See encapsulation vlan.
ip address
- Use to set a primary or secondary IP address for an interface or subinterface.
- Specify the layer 2 encapsulation before you set the IP address.
- Use the no version to remove an IP address or disable IP processing.
- See ip address.
pppoe
- Use to configure PPPoE as the encapsulation method on the interface.
- Use the no version to disable PPPoE on the interface.
- See pppoe.
pppoe subinterface fastEthernet
- Use to create a PPPoE subinterface on a Fast Ethernet interface.
- Use the no version to remove a PPPoE subinterface on a Fast Ethernet interface.
- See pppoe subinterface.
pppoe subinterface gigabitEthernet
pppoe subinterface tenGigabitEthernet
- Use to create a PPPoE subinterface on a Gigabit Ethernet interface or on a 10-Gigabit Ethernet interface.
- Use the no version to remove a PPPoE subinterface on a Gigabit Ethernet interface or on a 10-Gigabit Ethernet interface.
- See pppoe subinterface.
svlan ethertype
- Use to assign an Ethertype value for the S-VLAN subinterface.
- Choose one of the following Ethertype values:
- 8100—Specifies Ethertype value 0x8100, as defined in IEEE Standard 802.1q
- 88a8—Specifies Ethertype value 0x88a8, as defined in draft IEEE Standard 802.1ad
- 9100—Specifies Ethertype value 0x9100, which is the default
- Use an Ethertype value that matches the Ethertype value set on the customer premises equipment (CPE) to which your router connects.
- Examplehost1(config-if)#svlan ethertype 8100
- Use the no version to restore the default value, 9100.
- See svlan ethertype.
svlan id
- Use to assign S-VLAN IDs and VLAN IDs to VLAN subinterfaces.
- Use S-VLAN ID and VLAN ID numbers that are in the range 0–4095 and that are unique within the Ethernet interface.
- Use the mac-address keyword to specify a unique MAC address for the VLAN subinterface. When you do not specify a unique MAC address, the VLAN uses the MAC address of the Ethernet interface.
- Exampleshost1(config-if)#svlan id 4 255 host1(config-if)#svlan id 4 255 mac-address 0090.1a01.1234
- Issue the svlan id command before any upper bindings are made, such as IP or PPPoE.
- There is no no version.
- See svlan id.
