Juniper EX9200 Features Manual page 134

VPLS Feature Guide for EX9200 Switches
116
—Use Cisco-compatible HDLC framing on TCC circuits for connecting
cisco-hdlc-tcc
different media.
ethernet-bridge —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
ethernet-ccc
packets carrying standard Tag Protocol ID (TPID) values. For 8-port, 12-port, and
48-port Fast Ethernet PICs, CCC is not supported.
—For interfaces that carry IPv4 traffic, use Ethernet over ATM
ethernet-over-atm
encapsulation. When you use this encapsulation type, you cannot configure multipoint
interfaces. As defined in RFC 2684, Multiprotocol Encapsulation over ATM Adaptation
Layer 5, this encapsulation type allows ATM interfaces to connect to devices that
support only bridge protocol data units (BPDUs). Junos OS 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.
—For interfaces that carry IPv4 traffic, use Ethernet TCC encapsulation on
ethernet-tcc
interfaces that must accept packets carrying standard TPID values. For 8-port,
12-port, and 48-port Fast Ethernet PICs, TCC is not supported.
—Use Ethernet VPLS encapsulation on Ethernet interfaces that have VPLS
ethernet-vpls
enabled and that must accept packets carrying standard TPID values. On M Series
routers, except the M320 router, the 4-port Fast Ethernet TX PIC and the 1-port,
2-port, and 4-port, 4-slot Gigabit Ethernet PICs can use the Ethernet VPLS
encapsulation type.
—Use in a VPLS setup when a CE device is connected to a PE device over
ethernet-vpls-fr
a time division multiplexing (TDM) link. This encapsulation type enables the PE
device to terminate the outer Layer 2 Frame Relay connection, use the 802.1p bits
inside the inner Ethernet header to classify the packets, look at the MAC address
from the Ethernet header, and use the MAC address to forward the packet into a
given VPLS instance.
—Use in a VPLS setup when a CE device is connected to a PE device
ethernet-vpls-ppp
over a time division multiplexing (TDM) link. This encapsulation type enables the PE
device to terminate the outer Layer 2 PPP connection, use the 802.1p bits inside the
inner Ethernet header to classify the packets, look at the MAC address from the
Ethernet header, and use it to forward the packet into a given VPLS instance.
ether-vpls-over-atm-llc —For ATM intelligent queuing (IQ) interfaces only, use the Ethernet
virtual private LAN service (VPLS) over ATM LLC encapsulation to bridge Ethernet
interfaces and ATM interfaces over a VPLS routing instance (as described in
RFC 2684, Multiprotocol Encapsulation over ATM Adaptation Layer 5). Packets from
the ATM interfaces are converted to standard ENET2/802.3 encapsulated Ethernet
frames with the frame check sequence (FCS) field removed.
Copyright © 2016, Juniper Networks, Inc.