Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - COMMAND REFERENCE N TO Z 2010-10-19 Command Reference Manual page 443

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NOTE: The relay-format keyword determines the pseudowire PW Type value
that is used in LDP protocol messages. For a complete list of pseudowire
Type values, see http://www.iana.org/assignments/pwe3-parameters.
If you do not specify the relay-format keyword in the mpls-relay or route
interface command, the pseudowire Type value is chosen based on the type
of the interface. For Ethernet interfaces, the pseudowire Type value is chosen
as Ethernet (0x0005). For VLAN interfaces, the pseudowire Type value is
chosen as Ethernet Tagged Mode (0x0004)
Interface Configuration
Configuring Ethernet/VLAN Layer 2 Services, Configuring Frame Relay Layer 2 Services,
Configuring HDLC Layer 2 Services, Configuring Ethernet Raw Mode Encapsulation for
Martini Layer 2 Transport, and Configuring S-VLAN Tunnels for Layer 2 Services in the
JunosE BGP and MPLS Configuration Guide
Chapter 6: R Commands
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