Ethernet References - Juniper JUNOSE 11.0.X PHYSICAL LAYER Configuration Manual

For e series broadband services routers - physical layer configuration

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Access Operation

The ES2 10G ADV LM and ES2-S2 10GE PR IOA combination provides traditional

broadband access services such as PPPoE and subscriber interfaces. It also supports

both sides of the L2TP LNS and LAC function.

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 ADV LM can receive multicast traffic, including all multicast control

protocols. The ES2 10G ADV LM can also transmit multicast control protocol frames

and multicast data frames to perform multicast egress elaboration.

Flow Control and Policy

The ES2 10G ADV LM and ES2-S2 10GE PR IOA combination supports QoS

functionality that is available on other ASIC-based Ethernet modules.

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 ADV LM and ES2-S2 10GE

PR IOA, see JUNOSe Policy Management Configuration Guide.