PPP encapsulation. If you do not configure encapsulation, PPP is used by default. For
physical interfaces that do not support PPP encapsulation, you must configure an
encapsulation to use for packets transmitted on the interface.
You can optionally configure an encapsulation on a logical interface, which is the
encapsulation used within certain packet types. For more information about logical
interface encapsulation, see Configuring Interface Encapsulation on Logical Interfaces.
This section contains the following topics:
•
Configuring the Encapsulation on a Physical Interface on page 502
•
Encapsulation Capabilities on page 504
Configuring the Encapsulation on a Physical Interface
By default, PPP is the encapsulation type for physical interfaces. To configure the
encapsulation on a physical interface, include the encapsulation statement at the [edit
interfaces interface-name] hierarchy level:
[edit interfaces interface-name]
encapsulation (atm-ccc-cell-relay | atm-pvc | cisco-hdlc | cisco-hdlc-ccc | cisco-hdlc-tcc
| 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-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-vpls);
NOTE: ACX Series routers do not support cisco-hdlc encapsulation.
The physical interface encapsulation can be one of the following:
•
ATM CCC cell relay—Connects two remote virtual circuits or ATM physical interfaces
with a label-switched path (LSP). Traffic on the circuit is ATM cells.
For more information, see the Junos OS Administration Library.
•
ATM PVC—Defined in RFC 2684, Multiprotocol Encapsulation over ATM Adaptation
Layer 5. When you configure physical ATM interfaces with ATM PVC encapsulation, an
RFC 2684-compliant ATM Adaptation Layer 5 (AAL5) tunnel is set up to route the
ATM cells over a Multiprotocol Label Switching (MPLS) path that is typically established
between two MPLS-capable routers using the Label Distribution Protocol (LDP).
•
Ethernet cross-connect—Ethernet interfaces without VLAN tagging can use
Ethernet CCC encapsulation. Two related versions are supported:
•
CCC version (ethernet-ccc)—Ethernet interfaces with standard Tag Protocol ID
(TPID) tagging can use Ethernet CCC encapsulation. When you use this encapsulation
type, you can configure the ccc family only.
•
TCC version (ethernet-tcc)—Similar to CCC, but used for circuits with different media
on either side of the connection.
Copyright © 2017, Juniper Networks, Inc.502
ACX Series Universal Access Router Configuration Guide
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