3-33
RF-7800W
SYSTEM ADMINISTRATION AND CONFIGURATION
3.9.5 Data Smoothing
This is a security option that can be activated on a per-link basis. Data Smoothing adds random data to existing user
traffic in order to even out each radio’s transmission time. This can help obscure the radios from timing-related
attacks, but may have an impact on maximum user throughput when turned on (e.g. unidirectional traffic patterns).
3.9.6 802.1p Prioritization
In high-congestion situations, the SC can use 802.1p QoS Priority Code Point values to prioritize certain types of
critical data streams (e.g. VoIP or RTSP video). The radio has four prioritization queues for traffic that are mapped
to each of the eight 802.1p codes and untagged traffic. In times of high user throughput or congestion, data in the
highest queues is transmitted before data in lower queues. This allows for trading off low priority data in favor of
more important information.
3.9.7 Broadcast and Multicast
Non-unicast traffic like ARP broadcasts and multicast video streams are transmitted by the SPMP SC during its
dedicated broadcast/multicast time slot. This time slot uses a similar subset of configuration parameters as the
subscriber link configuration parameters. See Figure 3-20. Configuration and statistics can be accessed in the CLI
by using 'bcast' in place of the subscriber Link ID for some commands.
This time slot is dedicated only to downlink traffic (SC to SS), only one set of burst rates, CIR and PIR can be
configured. This time slot can also be prioritized with 802.1p QoS Priority Code Point values. Deviating from the
default settings is discouraged, since this can significantly affect the performance of certain types of traffic and is
difficult to troubleshoot.
SS and SPTP SC do not differentiate between broadcast/multicast and unicast traffic and treat them equally.
3.9.7.1 SS to SS Communication
Non-unicast traffic originating from SS radios can be kept segregated from or rebroadcast to all SS radios by the SC
during the broadcast/multicast time slot.
To Next Page
Loading...
