STM SatLink 2000 - Classe

SatLink VSAT User Guide
Publication no. 101557
Copyright © 2009 – STM Group, Inc.
Page 90 (160)
- switches off all learning methods
18.4 Four QoS Classes
The Quality of Service functionality of the STM SatLink VSAT is described in detail section 11. The
Best Effort PHB and Real Time Voice over IP (RT-VoIP) PHB group are available on all STM SatLink
VSAT models (provided the DVB-RCS Hub the VSAT is connected to supports these PHBs).
The Critical Data PHB and Real Time Video Conferencing PHB group are available as standard only on
the STM SatLink 1910 and requires the QoS4 SW license key to be configured on the STM SatLink
2000, 1000, 1900, and 1901 models. The table below shows which QoS Groups on which VSAT models
that require the QoS4 SW license key to be configured.
QoS
Group ID
QoS Group
Name
PHB SW License key required
SatLink
2000
SatLink
1000
SatLink
1900
SatLink
1901
SatLink
1910
0 Best Effort BE - - - -
1 VoIP Audio RT-VoIP - - - -
2 VoIP Signalling RT-VoIP - - - -
3 ViC Video RT-ViC QoS4 QoS4 QoS4 QoS4 -
4 ViC Audio RT-ViC QoS4 QoS4 QoS4 QoS4 -
5 ViC Signalling RT-ViC QoS4 QoS4 QoS4 QoS4 -
6 Critical Data CD QoS4 QoS4 QoS4 QoS4 -
18.5 Return Link Access Control (RAC)
The multi-field classifier of the STM SatLink VSAT can also be used to block undesired traffic from
being forwarded onto the return link. By mapping the return link traffic to the QoS group having index -1,
the STM SatLink VSAT can drop traffic destined to the return link based on the following parameters in
the IP header:
• IP source address
• IP destination address
• DSCP / TOS
• Protocol type
• TCP/UDP source port number
• TCP/UDP destination port number
Use the CLI command
ip mfc mask <module id> [<subindex>] <index> <group> {{+|-
}<tag> <tag-parms
to add RAC entries into the QoS Classification table. See section 11.1 for
information of how this command is used for classifying return link traffic into different QoS classes. The
command has a variable length where one ore more tags with different tag parameters can be set. The tags
are the different IP header parameters that can be used by the multi-field classifier to identify traffic that
shall be blocked.
Tag and tags parameters for CLI command Function
+src <ipaddr> <mask>
Define or modify IP source address and netmask
-src
Delete IP source address and netmask
+dst <ipaddr> <mask>
Define or modify IP destination address and
netmask
-dst
Delete IP destination address and netmask
+dscp <min> <max>
Define or modify DSCP range
-dscp
delete DSCP range
+prot <n> <p1> … <pn>
Define protocol value [0,255]. Up to 3 protocol
values can be defined (n can be 1, 2, or 3).