ND SatCom SKYWAN IDU 1070, Manual

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2010-10-26 Network Design and Engineering Guide 119
Data Networking
SkyWAN
®
Internet Protocol Features
The following figure 4-7 presents an overview over all available forwarding behaviors and their
mapping to the IP transmit queues.
Figure 4-7 Mapping of Forwarding Behaviours to Transmit Queues
Generally three traffic types can be distinguished:
-
IP Real time traffic: Forwarding behaviors Platinum and Platinum Dynamic define IP real
time traffic flows which are mapped to the transmit queues IP Real Time 1 and 2. The re-
quired capacity for these flows will be allocated as streaming slots. To determine the nec-
essary amount of streaming capacity the forwarding aggregate definition must include a
data rate.
- IP Non real time traffic: Forwarding behaviors Titanium defines a high priority, Gold-TCPA,
Gold, Silver, Bronze and Default normal priority non real time traffic. The high priority traffic
is mapped to the IP Control 2 queue, the normal priority traffic to the IP Non Real Time
queue. Capacity for this traffic type is allocated as dynamic slots.
- Management Plane IP traffic: Management plane IP traffic generated internally in the IDU
(e.g. OSPF routing messages, responses to SNMP queries) is mapped to the IP Control 1
queue. External IP traffic addressed to an Satellite Management interface (e.g. SNMP traf-
fic from SkyNMS PC) is mapped to the IP Control 2 queue. Note that this type of traffic is
classified automatically. No definition in the forwarding aggregate table is required. Capac-
ity allocation for this traffic is done using dynamic slots.
Finally it is also possible to define a drop forwarding behavior. IP flows mapped to this behavior
will not be forwarded to the satellite link but discarded instead.
In the following paragraphs some further details of the forwarding behaviors are discussed.