Configuring CoS on Enhanced IQ PICs

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The Enhanced IQ (IQE) PIC family supports a series of non-channelized and channelized interfaces that run at a large variety of speeds. Sophisticated Class-of-Service (CoS) techniques are available for the IQE PICs at the channel level. These techniques include policing based on type-of-service (ToS) bits, five priority levels, two shaping rates (the guaranteed rate and shaping rate), a shared scheduling option, Diffserv code point (DSCP) rewrite on egress, and configurable delay buffers for queuing. All of these features, with numerous examples, will be discussed in this chapter. For a comparison of the capabilities of IQE PICs with other types of PICs, see Comparing the M320, T-series, IQ, IQ2, and Enhanced IQ PICs.

For information about CoS components that apply generally to all interfaces, see CoS Overview and CoS Configuration. For general information about configuring interfaces, see the JUNOS Network Interfaces Configuration Guide. In particular, this chapter discusses:

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