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Configuring the Encapsulation Type

The encapsulation type you configure at each Layer 2 VPN site varies depending on which Layer 2 protocol you choose to configure. If you configure ethernet-vlan as the encapsulation type, you need to use the same protocol at each Layer 2 VPN site.

You do not need to use the same protocol at each Layer 2 VPN site if you configure any of the following encapsulation types:

atm-aal5—Asynchronous Transfer Mode (ATM) Adaptation Layer (AAL5)
atm-cell—ATM cell relay
atm-cell-port-mode—ATM cell relay port promiscuous mode
atm-cell-vc-mode—ATM virtual circuit (VC) cell relay nonpromiscuous mode
atm-cell-vp-mode—ATM virtual path (VP) cell relay promiscuous mode
cisco-hdlc—Cisco Systems-compatible High-Level Data Link Control (HDLC)
ethernet—Ethernet
ethernet-vlan—Ethernet virtual LAN (VLAN)
frame-relay—Frame Relay
frame-relay-port-mode—Frame Relay port mode
interworking—Layer 2.5 interworking VPN
ppp—Point-to-Point Protocol (PPP)

If you configure different protocols at your Layer 2 VPN sites, you need to configure a translational cross-connect (TCC) encapsulation type. For more information, see Configuring TCC Encapsulation on Interfaces.

To configure the Layer 2 protocol accepted by the PE router, specify the encapsulation type by including the encapsulation-type statement:




encapsulation-type type;

You can include the encapsulation-type statement at the following hierarchy levels:

[edit routing-instances routing-instance-name protocols l2vpn]
[edit logical-systems logical-system-name routing-instances routing-instance-name protocols l2vpn]

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