Specifications

UHP-1000 SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.5
(SW VERSION 2.5.X)
© ROMANTIS 2012 43 www.romantis.com
2.10.6 Prioritization and DSCP
Figure 18 Prioritization of traffic on the modulator
Packets directed to the modulator are at first encapsulated in SVLAN and then are placed into of the three priority
queues LOW, MED, HIGH. There is the fourth queue with a still higher priority but it is used for service traffic and
signaling. The queues work using a "hard” priority, i.e. packets from a lower priority queue are transmitted only
when a higher-priority queue is empty.
Selection of the packet getting into the LOW or HIGH can occur also depending on the DSCP packet field value. The
router understands DSCP values from 0 to 31. TOS value is calculated from DSCP value by multiplication by 8.
The following command defines distribution of packets between the queues depending on DSCP field:
ip dscp low|med|high STRING - DSCP values priority assignment
low|med|high – type of queues
STRING – DSCP field value from 0 to 63
2.10.7 Multicast routing
UHP routers support IGMP version 1-3, as well as static routing of multicast traffic.
Static routing of multicast traffic is implemented in UHP-1000 routers as follows:
To collect Multicast traffic from LAN to specified address you have to assign a map for this traffic on the
modulator. The router will itself understand that the address (network) belongs to the Multicast range and will
tune LAN to receive it.
At the other side, to transmit this traffic to LAN it is necessary (apart from the command to receive SVLAN used to
receive this traffic) to assign a static route to the Multicast address (network) of the transmitted traffic, having
selected, as the destination address, any address within the range of any of the IP networks assigned to the router.
The device with such address may be missing, it is more important that the packets be routed to LAN.
IGMP - Internet Group Management Protocol — provides multicast data transmission in IP networks. IGMP is used
by routers and IP-nodes to arrange network devices into the group. IGMP can be used to support streaming video
and online games, for these types of applications it allows using network resources more efficiently.
IGMP protocol can provide the routing of traffic between all network elements in different network topologies.
ROUTER
MODULATOR
LOW
ip map … ml …
MED
HIGH
ip map … mm …
ip map … mh …
ROUTER
MODULATOR
LOW
ip map … md …
MED
HIGH
Check
DSCP
0
63
DSCP map