User`s manual

Signamax 065-1600 series Managed Media Converter
Publication date: October, 2005
Revision 1.0
141
Function name:
Priority Queue Service
Function Description:
Signamax 065-1600 series provides three priority queue services for
transmission scheduling, including FCFS, strict priority and WRR. It is a global
function.
First Come First Service (FCFS): All incoming packets will be sent
out upon the sequence of packet’s
arrival order.
All High before Low: Aft
er all high priority packets are sent out, then low
ones are sent in turn.
Weighted Round Robin (WRR): This is actually a transmission ratio of
high priority packet and lo
w priority
packet. If you would like to repeatedly
send 5 high priority packets
first and
then 2 low priority packets. You can
set a 5 to high weight field and a 2 to
low weight field in WRR function row.
The WRR Default Setting High = 2,
Low = 1
Parameter description:
Sets the time that the packets can reside in the queue of the converter.
Max. bridge transmit delay bound:
The function “Maximum bridge transmit delay bound” is applied to limit
the maximum queuing time of the packets in the converter. If enabled,
the packets queued over the time set will be dropped. Valid values are 1
sec., 2 sec., 4 sec. and OFF. Default value is OFF.
Delay Bound:
Limit the resided time of the low priority packets in the converter. If the
low priority packet is not transmitted out and time set by “Delay bound” is
enabled, the packet will be dropped. The valid delay time is 1 – 255 ms
and OFF.
Default Max. Delay Time is 1ms.
NOTE: Make sure that “Max. bridge transmit delay bound” is enabled before
enabling Delay Bound, because Delay Bound must work under “Max.
bridge transmit delay bound is enabled”.