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Chapter 5: Configuring Ethernet Interfaces
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 196 .
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.
With a 120 Gbps fabric configuration, the E120 router can accommodate up to 6
combinations of ES2 10G LMs and ES2-S2 10GE PR IOAs. You can install a
combination in any of the line module slots, each of which is allocated 10 Gbps of
overall bandwidth.
With a 320 Gbps fabric configuration, the E320 router can accommodate up to 12
combinations of ES2 10G LMs and ES2-S2 10GE PR IOAs. You can install a
combination in any of the line module slots, each of which is allocated 10 Gbps of
overall bandwidth.
193
10-Gigabit Ethernet IOAs
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