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Default CAP
The "Default CAP" group allows for default priority mapping of packets that do not
have a VLAN or TOS bit (or if these are disabled). Settings are available for Unicast
(directed to a host).
• IGMP - (default CAP 3) - sets the channel access priority for IGMP frames - these
are the group management frames, not the stream data
• Unicast - (default CAP 1) - sets the default channel access priority for unicast
frames not matching any other classification or mapping.
• IGMP managed Multicast Stream (Fixed to CAP 2) - sets the default channel
access priority for stream data belonging to a snooped IGMP multicast group.
• Multicast/Broadcast - sets the default CAP for multicast frames not in a snooped
group and for broadcast frames.
After making CAP settings, clicking the Apply button will commit these, along with
the values from the Configuration tab, to NVRAM on the connected device.
IGMP
The "IGMP" group includes controls to disable the query timeouts. Checking the
'Override Defaults' box will enable the other boxes as choices.
Priority TTL Value
The "Priority TTL Value" determines the life span (Time to live) of each packet in
the buffer of the AV device that will be sent over the powerline subsequently. This
value can be varied from 10 msec to 65000 msec which can be mapped to different
levels of Channel access priority traffic. The default values used are stored in the
PIB file as shown below:
CA0 traffic: 2000 msec (used for TCP data traffic)
CA1 traffic: 2000 msec (used for TCP data traffic)
CA2 traffic: 300 msec (used for UDP video/music traffic)
CA3 traffic: 300 msec (used for VoIP traffic)
The default settings of 300 msec and 2000 msec are recommended that keeping
the same value, because those are optimized for the above stated traffic.
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