TSAT 3000 - Telemetry and data transfer via SATellite
TSAT 3000 Configuration Parameter Description, January 2013 Page 24 of 124
3.1.17 PORT_OPTIONS [n]
Default 0, Range 0…255 (0xFF)
Bit field to control miscellaneous PORT options.
Bit Mask Mnemonic Description Version
0
0x01
n/a
1
0x02
n/a
2
0x04
PRIORITY_FIXED
Disable dynamic priority allocation. >= 31.8.0
3
0x08
PRIORITY_TX_QUEUE
Enable Priority Send-Queue mechanisms.
4
0x10
DEBUG_PRINT_RX
Print (to Console) all packets received from PORT.
5
0x20
DEBUG_PRINT_TX
Print (to Console) all packets sent to PORT.
6
0x40
n/a
7
0x80
LOOP
Loop all data sent and received to/from PORT.
PRIORITY FIXED – Ver >= 31.8.0
Apply only to the Network-PORT – Normally
PORT_OPTIONS [ 3 ].
Normally, IP packets from the IP-Stack with “precedence” (in “Type-of-Service” field) >= 5 (i.e.
RTP packets) will be assigned HIGH priority (value 5) in Ver >= 31.8.0 (Release >= R4.7.0),
while all other IP packets will be assigned the priority defined by
PORT_PRIORITY [n].
PRIORITY_FIXED will disable this behaviour, and assign the same priority to all IP packets.
PRIORITY TX QUEUE
Normally, data to be stored in Interface Send-Queue will be discarded when total number of
already stored bytes exceeds the limit defined by
PORT_TX_QUEUE_SIZE [n]. This works OK for
STREAM and ADAPTER PORTs, because all packets to such PORTs will normally have the same
packet-priority.
However, packets sent to a
SERVICE PORT will normally have different packet-priority (defined
by
PORT_PRIORITY [n] and LCC_MANAGEMENT_PRIORITY), and we want to give more priority to
high-priority-packets. Therefore, data to
SERVICE PORTS will be discarded when the total
number of already stored bytes exceeds
PORT_TX_QUEUE_SIZE [n] x (Packet-Priority + 1).
The PRIORITY_TX_QUEUE option will enable this Priority-based Send-Queue mechanism for
STREAM and
ADAPTER PORTs as well. It might be necessary to do this if you want to give
different priority to some of the RTs in a Leased-Line (GROUP or BROADCAST).
DEBUG PRINT {RX | TX}
Print all packets received and/or sent from/to PORT to Console.
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