Interface Stacking; Configuration Example; Figure 19: S-Vlan Tunnels For Ethernet Layer 2 Services Over Mpls - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

Figure 19: S-VLAN Tunnels for Ethernet Layer 2 Services over MPLS

In this example, traffic from three VLAN subinterfaces must traverse the MPLS
network. To accomplish this using standard S-VLANs, you issue the following
commands to configure three separate S-VLANs with the same S-VLAN ID value and
different VLAN IDs, as follows:
By contrast, using an S-VLAN tunnel achieves the same result, but requires you to
issue only a single svlan id command with the keyword any in place of the VLAN
ID value. For example, the following command creates a single interface that tunnels
traffic from VLANs configured with an S-VLAN ID of 33 and any VLAN ID to the same
destination across the MPLS network. In effect, this command tunnels traffic from
all three VLANs shown in Figure 19 on page 185.

Interface Stacking

When you configure Ethernet layer 2 services over MPLS using S-VLAN tunnels, the
only interface that you can stack over an S-VLAN tunnel is an MPLS tunnel, which
you configure using the MPLS tunneling command (mpls-relay or route interface)
that is appropriate for your configuration. Attempting to configure any other interface
type such as IP, MPLS (nontunnel), or PPPoE over the S-VLAN tunnel causes the
router to generate an error and reject the configuration as invalid.
For details about configuring MPLS and layer 2 services over MPLS, see:

Configuration Example

This section uses the sample network topology shown in Figure 19 on page 185 to
illustrate the steps for configuring S-VLAN tunnels for Ethernet layer 2 services over
MPLS.
host1(config-if)#svlan id 33 10
host1(config-if)#svlan id 33 20
host1(config-if)#svlan id 33 30
host1(config-if)#svlan id 33 any
Chapter Configuring MPLS in JUNOSe BGP and MPLS Configuration Guide
Chapter Configuring Layer 2 Services over MPLS in JUNOSe BGP and MPLS
Configuration Guide
Configuring S-VLAN Tunnels for Layer 2 Services over MPLS
Chapter 5: Configuring VLAN and S-VLAN Subinterfaces
185