Encapsulation (Physical Interface) - Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual

JUNOS 10.1 Network Interfaces Configuration Guide

encapsulation (Physical Interface)

Syntax encapsulation (atm-ccc-cell-relay | atm-pvc | cisco-hdlc | cisco-hdlc-ccc | cisco-hdlc-tcc |
Hierarchy Level [edit interfaces interface-name]
Statement introduced before JUNOS Release 7.4.
Release Information
Physical link-layer encapsulation type.
Description
PPP encapsulation.
Default
atm-ccc-cell-relay
Options
atm-pvc
cisco-hdlc
cisco-hdlc-ccc
cisco-hdlc-tcc
ethernet-bridge
ethernet-ccc
ethernet-over-atm
1102
encapsulation (Physical Interface)
ethernet-bridge | ethernet-ccc | ethernet-over-atm | ethernet-tcc | ethernet-vpls |
extended-frame-relay-ccc | extended-frame-relay-ether-type-tcc | extended-frame-relay-tcc
| extended-vlan-bridge | extended-vlan-ccc | extended-vlan-tcc | extended-vlan-vpls |
flexible-ethernet-services | flexible-frame-relay | frame-relay | frame-relay-ccc |
frame-relay-ether-type | frame-relay-ether-type-tcc | frame-relay-port-ccc | frame-relay-tcc
| multilink-frame-relay-uni-nni | ppp | ppp-ccc | ppp-tcc | vlan-ccc | vlan-vci-ccc | vlan-vpls);
—Use ATM cell-relay encapsulation.
—Use ATM PVC encapsulation.
—Use Cisco-compatible High-Level Data Link Control (HDLC) framing.
—Use Cisco-compatible HDLC framing on CCC circuits.
—Use Cisco-compatible HDLC framing on TCC circuits for connecting
unlike media.
—Use Ethernet bridge encapsulation on Ethernet interfaces that have
bridging enabled and that must accept all packets.
—Use Ethernet CCC encapsulation on Ethernet interfaces that must accept
packets carrying standard Tag Protocol ID (TPID) values.
—For interfaces that carry IPv4 traffic, use Ethernet over ATM
encapsulation. When you use this encapsulation type, you cannot configure
multipoint interfaces. As defined in RFC 1483, Multiprotocol Encapsulation over
ATM Adaptation Layer 5, this encapsulation type allows ATM interfaces to connect
to devices that support only bridged protocol data units (BPDUs). The JUNOS
Software does not completely support bridging, but accepts BPDU packets as a
default gateway. If you use the router as an edge device, then the router acts as
a default gateway. It accepts Ethernet LLC/SNAP frames with IP or ARP in the
payload, and drops the rest. For packets destined to the Ethernet LAN, a route
lookup is done using the destination IP address. If the route lookup yields a full
address match, the packet is encapsulated with an LLC/SNAP and MAC header,
and the packet is forwarded to the ATM interface.