Technical Documentation

Configuring a Layer 2 VPN Routing Instance on a VLAN-Bundled Logical Interface

This topic describes how to configure a Layer 2 VPN routing instance on a logical interface bound to a list of VLAN IDs.

Configuring a VLAN-Bundled Logical Interface

To configure a VLAN-bundled logical interface, specify the list of VLAN IDs by including the vlan-id-list statement or the vlan-tags statement on a provider edge (PE) router:

interfaces {ethernet-interface-name {vlan-tagging; # Support single- or dual-tag logical interfaces flexible-vlan-tagging; # Support mixed taggingencapsulation (extended-vlan-ccc | flexible-ethernet-services);unit logical-unit-number {vlan-id-list [vlan-id vlan-idvlan-id]; # For single-tagvlan-tags outer <tpid.>vlan-id inner-list [vlan-id vlan-idvlan-id]; # For dual-tag}. . .}}

You can include the statements at the following hierarchy levels:

  • [edit]
  • [edit logical-systems logical-system-name]

Specifying the Interface Over Which VPN Traffic Travels to the CE Router

To configure a Layer 2 VPN routing instance on a PE router, include the instance-type statement and specify the value l2vpn. To specify an interface connected to the router, include the interface statement and specify the VLAN-bundled logical interface:

instance-type l2vpn;interface logical-interface-name;

You can include the statements at the following hierarchy levels:

  • [edit routing-instances routing-instance-name]
  • [edit logical-systems logical-system-name routing-instances routing-instance-name]

Specifying the Interface to Handle Traffic for a CCC

To configure the VLAN-bundled logical interface as the interface to handle traffic for a circuit connected to the Layer 2 VPN routing instance, include the following statements:

protocols {l2vpn {(control-word | no-control-word);encapsulation-type (ethernet | ethernet-vlan); site site-name {site-identifier identifier;interface logical-interface-name { # VLAN-bundled logical interface. . . interface-options . . .}}}}

You can include the statements at the same hierarchy level at which you include the instance-type l2vpn and interface logical-interface-name statements:

  • [edit routing-instances routing-instance-name]
  • [edit logical-systems logical-system-name routing-instances routing-instance-name]

To enable a Layer 2 VPN routing instance on a PE router, include the l2vpn statement. For more information, see the JUNOS VPNs Configuration Guide.

The encapsulation-type statement specifies the Layer 2 protocol used for traffic from the customer edge (CE) router. If the Layer 2 VPN routing instance is being connected to a single-tag Layer 2 circuit, specify ethernet as the encapsulation type. If the Layer 2 VPN routing instance is being connected to a dual-tag Layer 2 circuit, specify ethernet-vlan as the encapsulation type.

To specify the interface to handle traffic for a circuit connected to the Layer 2 VPN routing instance, include the interface statement and specify the VLAN-bundled logical interface.


Published: 2010-04-20