Comtech EF Data MDX420 SkyWire Manual - Manual (Page 71)

MDX420 SkyWire™ Satellite Network Gateway SkyWire Controller (GUI)
MN-MDX420 Revision 6 7–15
NORMAL - Uses the following formats (IEEE 803.3ac Tag containing IEEE 802.1p priority
information provided by an external device, Type of Service field (RFC 791) or Differentiated
Services field (RFC 2474) contained in an IPv4 header and Traffic Class field (RFC 2460)
contained in an IPv6 header.
PORT BASED - In this mode, (J3) has the highest priority and (J4) has the lowest priority. The
Port Based overrides any standard priority
QoS QUEUE (FAIR WEIGHTED, STRICT PRIORITY)
FAIR WEIGHTED: - Selects the queue weighting of 8,4,2,1 that insures even the lowest priority
traffic gets some bandwidth (packets are processed in a weighted round robin manner).
STRICT PRIORITY: - insures that the higher priority traffic will always be transmitted before any
lower priority traffic. With this setting, the lower priority traffic can starve.
First In First Out (FIFO): - In certain circumstances it may be desirable to have the Ethernet
Interface to operate in a FIFO like mode with no reordering of packets. This can be done by
using a single port and setting the Ethernet QoS type to Port Base and the Ethernet QoS Queue
to strict priority. This will allow packets to be transmitted in the exact order in which they are
received.
Default settings for the terrestrial interface are:
M&C Control Port:
In-Band Control:
Disabled
Ethernet Data Port:
Flow Control:
Enabled
Daisy Chain: Disabled
Quality of Service:
Type: Normal
Queuing: Fair
Weighted
Figure 7.4.2-2 Daisy Chain Set up for Data Ports