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« on: December 03, 2015, 04:38:58 PM »
Hello,
I have a Mitel 3300 here that has VoIP phone users reporting robotic calls. We believe this to be a possible issue with the LAN Policy settings. It is currently set as follows:
DSCP [0-63] L2 Priority [0-7]
Voice Media 44 6
Voice Signalling 44 6
Standard 0 0
I have checked the phones and can see that the DSCP is set for 46 and the L2 Priority is set for 5.
My question is that should the above settings on the 3300 be changed to reflect what is on the phones? I have a wireshark trace file that shows the phone has the 46 for the DSCP, but the 3300 has a 0.
Is my logic correct and that these setting should match and the LAN Policy screen controls what the 3300 is set for on the DSCP?
Here are a couple of packets from the wireshark:
Internet Protocol Version 4, Src: 10.100.1.1xx, Dst: 10.100.1.2xx
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes
Differentiated Services Field: 0xb8 (DSCP: EF PHB, ECN: Not-ECT)
1011 10.. = Differentiated Services Codepoint: Expedited Forwarding (46)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 200
Internet Protocol Version 4, Src: 10.100.1.2xx, Dst: 10.100.1.1xx
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes
Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
0000 00.. = Differentiated Services Codepoint: Default (0)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 200
Thank you,
Mark