Hi I would like to understand the the output of the RTP Streams Analysis I get here by going to: Telephony > RTP > Show All Streams. In the output, under the 'Lost Column' I have -1722(-100.0%). Also seen when you click the Analyze Button, the bottom reads: Total RTP packets = 1722 (expected 1722) Lost RTP packets = -1722 (-100.00%) Sequence errors = 1722 I dont understand Lost -1722 (the negative value). I dont understand -100% (the negative value). I dont understand the expectation of 1722, the loss of -1722, the sequence errors of 1722. Yet there was no problem with this test call/RTP stream. Your explanation/advise will be greatly appreciated. This question is marked "community wiki". asked 06 Dec '13, 06:36  ahmedn edited 06 Dec '13, 06:38 |
One Answer:
What you see if the effect of duplicate packets in your capture. The fact that you have -100% lost means you have 100% packets too many. Then there's the fact that you have 1722 (=100%) sequence errors, because every duplicate (which has the same sequence number) adds to the seq# error count. This is prone to happen when you monitor a VLAN on a switch, which captures both ingress and egress. Either capture only one direction, or sanitize your capture file. answered 10 Dec '13, 02:28  Jaap ♦ |
what is your:
Is it possible to post the capture file somewhere (google drive, dropbox, cloudshark.org or mega.co.nz)?