Is DSCP used as CS5?
A. Yes, this is based on the RFC 4594 recommendation that IP Video Surveillance be included in the Broadcast Video traffic service class. Cisco is marking this class to CS5. See the following link for more details: http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSIntro_40.html#wp60882 The most significant of the differences between Cisco’s QoS baseline and RFC 4594 is that the RFC 4594 recommendation to mark Call Signaling to CS5. Cisco has completed a lengthy and expensive marking migration for call signaling from AF31 to CS3 as such, there are no plans to embark on another marking migration in the near future. It is important to remember that RFC 4594 is an informational RFC (in other words, an industry best-practice) and not a standard. Therefore, for Cisco recommended designs, RFC 4594 marking values are used throughout, with the one exception of swapping Call-Signaling marking (to CS3) and Broadcast Video (to CS5). On all Cisco unified communications
