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similar join packet to all other ports on the switch, informing them
that incoming multicast traffic for the stated group is to be
forwarded to the requesting port.
Class-of-Service (CoS) Support
The SMC6724L2 provides two transmit queues on each port, with a
weighted fair queuing scheme. This function can be used to
provide independent priorities for various types of data, such as
real-time video or voice, and best-effort data.
Priority assignment to a packet in the SMC6724L2 can be
accomplished in any of the following ways:
•
Priority can be explicitly assigned by endstations which have
applications that require a higher priority than best-effort. This
switch utilizes the IEEE 802.1p and 802.1Q tag structure to
decide priority assignments for the received packets.
•
A port may be manually configured as high priority. In this
case, when any other port receives traffic from a high-priority
port, that traffic is automatically placed in the high-priority
output queue.
C
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-S
LASS
OF
ERVICE
(C
S) S
O
UPPORT
4-11
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