Juniper JUNOSE 11.2.X MULTICAST ROUTING, Configuration Manual

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Uplink Operation
The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination provides an uplink
connection from the core network to the edge rather than traditional broadband access
services such as PPPoE, transparent bridging, and subscriber interfaces.
The combination can receive and transmit full duplex line rate of 10 GB (10 GB at the
ingress and 10 GB at the egress). The IOA can also support 9600-byte jumbo packets
at both the ingress and egress.
NOTE: The size of jumbo packets refers to the maximum allowable size in bytes of the
MRU for the jumbo Ethernet frames and not the maximum allowable size in bytes of
the MTU (frames transmitted from the egress interface).
Multicast
The ES2 10G Uplink LM can receive multicast traffic, including all multicast control
protocols. The ES2 10G Uplink LM can also transmit multicast control protocol frames
and multicast data frames to perform multicast egress elaboration.
L2TP
An E Series router can be configured as either an L2TP access concentrator (LAC) or an
L2TP network server (LNS). The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination
supports an E Series router configured as a LAC only for traffic to or from an LNS. The
ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination supports both sides of the
L2TP LNS function (LAC facing and core facing).
Flow Control and Policy
The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination does not support quality
of service (QoS) functionality that is available on other ASIC-based Ethernet modules.
Although the ES2 10G Uplink LM does not support scheduling and shaping for egress
traffic, the LM does account for the traffic class of packets through the fabric so that
high priority packets are scheduled for transmission to the line module before lower
priority packets. Packets that arrive at the line module are processed and transmitted
using a flow-through scheme.
Currently, flow control using MAC pause frames is disabled on the ES2-S2 10GE PR IOA.
The IOA does not transmit or receive pause frames. Instead, the system prioritizes control
traffic over non-control traffic (that is, data). For a list of types of control traffic, see
“High-Density Ethernet” on page 187
.
For information about configuring policies on the ES2 10G Uplink LM and ES2-S2 10GE
PR IOA, see
JunosE Policy Management Configuration Guide .
ES2 10G LM Combination
With a 100 Gbps fabric configuration, the E320 router can accommodate up to 2
combinations of ES2 10G LMs and ES2-S2 10GE PR IOAs. You must install a combination
in either of the turbo slots (slot 2 or slot 4). The 100 Gbps allocates 10 Gbps of overall
bandwidth to each of these slots.
Copyright © 2010, Juniper Networks, Inc. 184
JunosE 11.2.x Physical Layer Configuration Guide