Nera SatLink 1000, User Manual

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Nera SatLink Terminal User Guide – Revision P
39
8.1 Configuring QoS for the return link
In order to determine the QoS group an IP packet belongs to, the SatLink terminal uses a multi-field
classifier. This multi-field classifier is used to perform a look-up in a QoS classification table. This table
can store up to 15 different masks that the IP packets will be matched against.
The following parameters in the IP header can be used for doing the QoS classification:
•
IP source address
•
IP destination address
•
DSCP / TOS
•
Protocol type
•
TCP/UDP source port number
•
TCP/UDP destination port number
The format of the QoS classification table is:
Index QoS
Group Dest. IP
Address
Mask Source IP
Address
Mask DSCP
Range
(Start-Stop
values) Protocol
Type
(up to 3
values) TCP/UDP
Source Port
Range (Start-
Stop values) TCP/UDP
Dest. Port
Range (Start-
Stop values)
1-15 0 or 1 0-63 0-255 0-65535 0-65535
The index parameter is used to uniquely identify an entry in the QoS classification table and decides the
order in which the QoS classification table is searched. When an IP packet is to be QoS classified, the
QoS classification table is searched from index 1 to index 15. If a match is found, the search is stopped,
and the IP packet is thereafter handled with the QoS Group for this entry in the QoS classification table. If
a match is not found for an IP packet it will be treated as best effort traffic. QoS Group 0
is defined to be
the Best Effort QoS Group and QoS Group 1 is VoIP/Real-Time QoS group.
Factory default configuration is that the QoS classification table is empty, and all traffic is handled as
Best Effort (QoS Group 0). A user with privilege rights 2 (user
install or equivalent) can configure a QoS
Classification table in the terminal as explained below, but the use of QoS group 1 can be inhibited by the
network operator/service provider. Please contact the network operator/service provider for use of QoS
group 1 for VoIP/real-time traffic.