[VoiceOps] VoIP passive monitoring appliances or software - any recommendations?
ctaloi at gmail.com
Thu Feb 13 13:37:57 EST 2014
Hey Brian -
I've used Empirix/Hammer in the past but found the ongoing cost,
maintenance and complexity wasn't worth it.
We recently deployed VoIP Monitor to our remote POPs feeding back to a
central VoIP Monitor box with a nice front end.
I'm very happy with the solution.
On 12 Feb 2014, at 16:02, Gast, Jim wrote:
> Hi, Brian -
> If your VoIP endpoints can give you RTCP-XR (RFC-3611), turn it on.
> You can harvest the "Statistics Summary Report Block" for Jitter and
> Packet Loss stats and the "VoIP Metrics Report Block" for things like
> MOS score. All of these stats are from the viewpoint of that
> particular VoIP endpoint. They aren't very good at helping you find
> the site of packet losses, but they are great at telling you whether
> or not you have a problem.
> / Jim Gast, TDS Telecom
> From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of
> Brian Knight
> Sent: Wednesday, February 12, 2014 2:15 PM
> To: voiceops at voiceops.org
> Subject: [VoiceOps] VoIP passive monitoring appliances or software -
> any recommendations?
> $DAY_JOB is at a national ISP/NSP where we resell VoIP services. We
> do peering with the VoIP carrier at one of our remote POP's. We are
> looking for a better way to be able to monitor the handoff of those
> calls to our carrier over that peering link.
> We have quite a bit of instrumentation within our walled garden to
> tell us about call quality. We can monitor our QOS policies to ensure
> packets aren't being dropped by intermediate routers. If the customer
> uses our routers to terminate their SIP session, we can pull call
> quality stats from those routers as well. We can also use our own
> office telephones to make and receive test telephone calls, and we can
> of course run Wireshark captures from the switches to which those
> phones are connected.
> However, we can't say for certain that the customer's RTP traffic
> actually made it on the wire connecting us to the VoIP provider, nor
> can we say that the traffic is being transmitted and received
> properly. The peering link is connected to a Cisco 12k router on our
> side, so there is no way (afaik) to mirror the port, as on a switch.
> For the moment, I am envisioning that we'll need to deploy a server
> running Wireshark to the remote POP. It will need two network
> interfaces; one connected to a management network, the other a capture
> interface. The capture interface will connect to a network tap, and
> the network tap connected in-line between our router and the patch
> Wireshark is probably adequate for what we need. But I'm wondering if
> there is any software or an appliance that would do the job better.
> Given the usual details - calling number, called number, date and time
> - we want to be able to quickly inspect traffic and dig into the
> details of the stream. Do we see any missing packets from the media
> stream? What is the MOS score of a particular call? Do we see any
> missing packets coming from us? Any missing packets from the
> Alerting on bad call quality would be a nice-to-have addition.
> Any recommendation would be appreciated. Thanks in advance.
> -Brian Knight
> VoiceOps mailing list
> VoiceOps at voiceops.org
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