Activation of Session Mirroring for a Gate

When session mirroring is enabled, the PG uses information in PGCP requests received from the PGC to identify sessions to be mirrored and to trigger the mirroring session. The following sample PGCP request includes session-mirroring information:

MEGACO/2 [123.123.123.3]:2944
Transaction = 10003 {
    Context = $ {
        Add = $ { 
            Media {
                LocalControl {
                    Mode = SendReceive,
                    li/LICn=ff00ff00ff00ff00},    
                    li/LITID = [ffffff00, ffffff01], 
                Remote {
                        v=0
                        c=IN IP4 124.124.124.222
                        m=audio 2222 RTP/AVP 0
                        a=ptime:20
                    }
                }
        }
    }
}

• The LICn command provides an encrypted correlation number. The PGCPD process decrypts the correlation number to determine whether session mirroring is performed on the gate. If the number is valid, interception is performed on the gate. If the number is invalid, no interception is performed on the gate.
• The LITID command contains one or more target IDs that identify the recipients of mirrored packets. If the request contains multiple LITIDs, a copy of mirrored packets is created for each target ID. All copies are sent to the same delivery function. A maximum number of seven copies is supported for each packet.

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