QoS Media Policy on the Acme Packet SBC10 Mar 2017
QoS for SIP and RTP on an Acme Packet SBC it is critical to use proper
ToS HEX values. This is accomplished through a
The first step is to create a Media Policy as shown.
sd4500-02# config t sd4500-02(configure)# media-manager sd4500-02(media-manager)# media-policy sd4500-02(media-policy)# name QoS-Audio
media-type should be set to
message and the proper
0×60 (CoS 3, DSCP 24). For RTP the media-type value should be set to
audio and the proper tos-value for RTP traffic is
0xb8 (Cos 5, DSCP 46).
media-policy name QoS-Audio tos-settings media-type audio media-sub-type tos-value 0xb8 media-attributes tos-settings media-type message media-sub-type sip tos-value 0x60 media-attributes
Setting these values in the
Media Policy does not invoke QoS. This is simply a set of instructions of what should be applied to signaling and RTP packets but we need to tell the SBC where to apply it. This is done on a
realm-config identifier Access description Public Facing-Untrusted addr-prefix 220.127.116.11/24 network-interface m00:226 ... dns-realm media-policy QoS-Audio media-sec-policy
media policy assigned to the
realm this answers the question of where to apply QoS so the policy is
enforced. Any traffic which passes through this realm will be marked, or re-marked, with the appropriate QoS values.