Setting the Number of Egress Queues on IQ2 and Enhanced IQ2 PICs
Gigabit Ethernet IQ2 4-port and 8-port Type 2 PICs are oversubscribed, which means the amount of traffic coming to the PIC can be more than the maximum bandwidth from the PIC to the Flexible PIC Concentrator (FPC).
By default, PICs on M320, MX Series, and T Series routers support
a maximum of four egress queues per interface. Some PICs, such as
the IQ2 and IQ2E PICs, have eight egress queues enabled by default
on platforms that support eight queues. You configure the number of
egress queues as four or eight by including the max-queues-per-interface statement at the [edit chassis fpc slot-number pic pic-slot-number] hierarchy level:
[edit chassis fpc slot-number pic pic-slot-number] max-queues-per-interface (4 | 8);
The numerical value can be 4 or 8.
For more information about configuring egress queues, see Configuring Up to 16 Custom Forwarding Classes.