206 | Managing the Radio
Aprisa SR+ User Manual 1.11.1
ETHERNET PRIORITY
This parameter controls the per port priority of the Ethernet customer traffic relative to the serial customer
traffic. If equal priority is required to serial traffic, this setting must be the same as the Serial Data Priority
setting.
The Ethernet Priority enables users to set the priority of Ethernet port ingress frames. The priority for each
port can be:
Priority
Description
Low
All port frames are set to low priority
Medium
All port frames are set to medium priority
High
All port frames are set to high priority
Very High
All port frames are set to very high priority
From Tagged Frame (PCP)
All port frames are set to PCP priority bits (VLAN priority) in
VLAN tagged frames or priority tag (VLAN 0) frames.
To enable, see ‘
From Packet (DSCP)
All port frames are set to DSCP priority bits in an IP packet
(DSCP in IPv4 TOS field).
To enable, see ‘
DSCP (Differentiated Services Code Point)
on page 209.
The default setting is Low.
A queuing system is used to prioritize customer traffic from the serial and Ethernet interfaces for over the
air transmission. A weighting may be given to each data type and this is used to schedule the next
transmission over the air e.g. if there are pending data packets in multiple buffers but serial data has a
higher weighting it will be transmitted first. The Ethernet buffer is 10 Ethernet packets (1 packet can be up
to Ethernet MTU, 1536 bytes).
There are four priority queues in the Aprisa SR+: Very High, High, Medium and Low priority. Data is added
to one of these queues depending on the priority setting. Data leaves the queues from highest priority to
lowest; the Very High queue is emptied first, followed by High then Medium and finally Low.
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