Download (PDF - 1.4 MB) - NBN Co
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TC-MC 21 4 22 N/A N/A<br />
TC-4 0<br />
CS1, AF 11 – 13<br />
CS0, Default<br />
8 – 15,<br />
0 – 7<br />
Note that, in relation to the NFAS, when a Multicast AVC is active on a DSCP-Mapped UNI-D, any<br />
ingress IGMP traffic will be carried irrespective of its DSCP markings using the following traffic class:<br />
<br />
<br />
TC-4 for the associated unicast AVC and CVC<br />
TC-MC for Multicast Domain<br />
When there is no Multicast AVC active on the UNI-D, any ingress IGMP traffic will be mapped<br />
upstream to the AVC as per the mapping policy of the UNI-D.<br />
4.9 Priority Decoding<br />
This section describes how service frames carried in <strong>NBN</strong> <strong>Co</strong> traffic classes will have priority encoded<br />
at the egress from the <strong>NBN</strong> <strong>Co</strong> Network. Egress <strong>Co</strong>S decoding is described in Table 13.<br />
Table 13 Class of Service Decoding<br />
Traffic class<br />
PCP/DSCP Assignment (Egress)<br />
<strong>Co</strong>S (UNI-D & NNI)<br />
TC-1 5<br />
TC-MC 4 23<br />
TC-4 0 24<br />
21 Multicast AVCs do not accept ingress service frames at the UNI-D<br />
22 Only applicable at the NNI<br />
23 Applies only to upstream IGMP traffic carried through the Multicast Domain at egress from NNI<br />
24 Includes upstream IGMP traffic carried through the CVC<br />
Page 22 of 77<br />
28/08/2013 © 2013 <strong>NBN</strong> <strong>Co</strong> Ltd SFAA – Product Technical Specification for the <strong>NBN</strong> <strong>Co</strong><br />
Ethernet Bitstream Service
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