Released
PMC-Sierra, Inc.
PM9311/2/3/5 ETT1™ CHIP SET
Data Sheet
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
The Scheduler will not necessarily schedule all ports in a fanout at the same cell time. In other words, the
same multicast cell might pass through the Crossbar on several occasions before all egress ports have
received their copy of the cell.
Every ETT1 port has a single ingress queue and a single egress queue for multicast traffic at each priority,
as shown in Figure 10. (There are also request counters, as for unicast cells, but these are not shown.)
32
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
PMC [ PMC-SIERRA, INC ]
