Setting Up The Dmd20/Dmd20 Lbst Ethernet Bridge To Operate Like A Fifo - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
When Strict Priority is selected, the interface transmits packets from the highest priority queue
until it is empty. It then begins transmitting data from the next highest priority queue. If higher
priority data arrives, the interface finishes the current packet and then goes back to transmitting
packets from the higher priority queue until it is again empty. Care must be taken when selecting
Strict Priority, as it is entirely possible for the lower priority queues to be stalled indefinitely.
J.1.5 Setting Up The DMD20/DMD20 LBST Ethernet Bridge To Operate Like
A FIFO
In certain circumstances, it may be desirable to have the Ethernet interface operate in a FIFO like
manner with no reordering of packets. This can be established by using a single port on the
Ethernet interface and setting the Ethernet QOS Type to Port Based and the Ethernet QOS
Queue to Strict Priority. When Setup and used in theis manner, the packets will be transmitted in
the exact order in which they are received.
MN-DMD50 - Revision 3
Figure J-1 Point-to-Multipoint with Daisy Chaining
Ethernet Data Interface Setup
J–3