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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 .

For information about configuring policies on the ES2 10G Uplink LM and ES2-S2 10GE PR IOA, see JUNOSe Policy Management Configuration Guide.

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