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SpectraLink Corporation Installation, Configuration, and Administration
NetLink SVP Server (within IP environments)
PN: 72-0178-01-F.doc Page 24
QoS Configuration
DSCP tags set packet priorities for QoS.
DSCP Tag
DSCP (Differentiated Services Code Point) is a QoS mechanism for setting
relative priorities. Packets are tagged with a DSCP field in the IP header. The
decimal value may be set as a number from 0-63 and may be different for each
traffic class listed on the screen.
• Administration tags set the priority for telnet, TFTP, and other
administrative traffic. Administrative traffic can have the lowest priority
because it does not require voice quality.
• WT (In call) traffic requires voice quality and may be set to a higher
priority than WT (Standby) traffic.
• RTP traffic is the audio traffic to the IP PBX. It requires voice quality.
•
PBX traffic is not audio to the PBX.
• Inter-SVP2 traffic is the information-passing protocol that SVP Servers
use to communicate with each other.
When forwarding packets, the SVP Server shall always overwrite the received
DSCP value. The final DSCP tag for packets in each of the traffic classes are
assigned a DSCP value based on the following rules. (Please see table on next
page.)
• If both Administration and the Traffic Class setting is Default, the
Default value as shown in the table below will be used.
• If Administration is set at any number (Value X) other than Default, that
setting (
Value X) it will override the Default value of the Traffic Class.