[cisco-voip] Voice traffic over SDWAN

[Ryan Huff]

If your SD-WAN solution has packet duplication (aka 0 time failover) my experience is that it tends to work well.

Other SD-WAN solutions may work better for VoIP if you can pin SIP/s RTP/sRTP to one side or the other (active/passive over active/active).

Depending on the VoIP and SD-WAN scenario, sometimes packets from call session A that started on network path A may end up on network path B in the SD-WAN appliance (when that traffic is load balanced/inspected/classified by the SD-WAN) and that isn’t always tolerated well by some real-time applications (Cisco Expressway can be uniquely sensitive to this).

Typical half duplex tcp traffic tolerates this fairly well and the sending/receiving applications may not even notice or see it as minor packet loss and initiate TCP retransmission. Full duplex traffic like media (and by extension real-time applications) generally do not handle that well.

Thanks,

Ryan

On Dec 19, 2019, at 15:59, Kent Roberts <kent at fredf.org> wrote:

 I didn’t notice anything different then from the regular wan


Kent

On Dec 19, 2019, at 13:50, Fares Alsaafani <fares.sky at gmail.com> wrote:


Hi all,

Did anyone came recently cross deploying or POC voice over SDWAN solution.
I’m looking for thoughts , experiences , tests , things to avoid?

Fares,

--
Best Regards

FARES ALSAAFANI
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