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# Configuring S-VLAN Tunnels for Layer 2 Services

When you configure Ethernet or bridged Ethernet layer 2 services over MPLS, you can use the svlan id command with the any keyword to create a stacked VLAN (S-VLAN) tunnel that uses a single interface to tunnel traffic from multiple VLANs across an MPLS network. The S-VLAN tunnel enables multiple VLANs, each configured with a different VLAN ID tag and a common S-VLAN ID, to share a common VC label while traversing an MPLS network.

You can use the svlan id command with the any keyword only with the mpls-relay command or the route interface command to configure layer 2 services over MPLS.

To configure S-VLAN tunnels for Ethernet/VLAN layer 2 services over MPLS:

1. Configure the Ethernet/VLAN interface.
   `
   host1(config)#interface fastEthernet 8/1
   host1(config-if)#encapsulation vlan
   host1(config-if)#interface fastEthernet 8/1.1
   `
2. Create the S-VLAN tunnel and assign the S-VLAN Ethertype. For example, the following commands tunnel traffic from VLANs configured with an S-VLAN ID of 33 and any VLAN ID to the same destination across the MPLS network.
   `
   host1(config-if)#svlan id 33 any
   host1(config-if)#svlan ethertype 8100
   `
3. Specify MPLS tunneling by using the appropriate command. For example:
   `
   host1(config-if)#route interface tunnel mpls:tunnel3 45
   `

   or

   `
   host1(config-if)#mpls-relay 10.10.100.2 45
   `
4. Repeat these steps, using unique values to configure the S-VLAN tunnel and MPLS on the remote PE router.

#### Related Topics

- For more information about S-VLANs, including complete configuration instructions, see the JUNOSe Link Layer Configuration Guide
- encapsulation vlan
- interface fastEthernet
- mpls-relay
- route interface
- svlan ethertype
- svlan id

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