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Enabling Monitoring of RTP and RTCP Traffic

You can enable RTP and RTCP ALGs for twice NAT flows created when the PGC installs media gates on the VPG. The ALGs monitor packets on the gate and provide statistics.

You can enable these ALGs only for flows created by the VPG. You cannot enable them within standalone NAT rules.

Step-by-Step Procedure

You can choose to monitor either RTP or RTCP, or both. To enable monitoring of RTP and RTCP media flows:

Access the configuration of your VPG.[edit services pgcp] user@host#edit gateway vpg-1
Enable monitoring of both RTP and RTCP for media flows.[edit services pgcp gateway vpg-1] user@host#set monitor media
Enable monitoring of only RTP media flows.[edit services pgcp gateway vpg-1] user@host#set monitor media rtp
Enable monitoring of only RTCP media flows. [edit services pgcp gateway vpg-1] user@host#set monitor media rtcp

In operational mode, view statistics gathered for RTP and RTCP.

user@host> show services pgcp gates
gate-id 352187384065 statistics

Gate Statistics:
================
Output packets: 582
Input packets: 582
Dropped packets: 0
Lost RTP packets: 0

RTCP statistics:

SSRC           : 32270
Sender octets  : 7500
Sender packets : 375
Invalid packets: 9

RTCP Receiver statistics:

SSRC        Lost packets   Lost fraction         Jitter
13043                  0           0.000              0
16487                  0           0.000              0
5655                   0           0.000              0

. . .

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