Can I ask a few questions about how Jabber would behave in a few QoS scenarios as I'm having difficulty finding this information in the SRND:
1. Is Jabber clever enough to mark audio and video traffic differently?
2. What QoS makings would be made to RTP packets by the Jabber client when:
i. An Audio Call is made?
ii. A Video Call is made?
3. What happens to an audio call when elevated/changed to a video call (from a QoS perspective) and vice versa?
4. If Jabber can dynamically change the QoS values based on the type of call (audio or video) when in a video call, will the audio traffic be marked with the same markings as the video call to ensure there are no lip sync issues?
Ideally we would expect that Jabber would behave as a IP Softphone (CS3 for signalling and EF for RTP) when in an audio call, but as a Video Endpoint (CS3 for signalling and AF41 for RTP)
Here are my answers to your question as per my understanding.
1. Traffic classification in a wireless device is depend on its wireless driver hardware/operating system (jabber client is running on top of that). If wireless device is WMM certified generally we would expect it to differentiate traffic in to one of Voice/Video/Besteffort/Background categories. According to this, wireless frame have a tag called User Priority and traffic get prioratize within the wireless cell based on this value.
2. Again this is depend on what type of wireless client you have. Jabber application cannot determine this 100%. UP value is the key to prioratise traffic within the wireless media. Some Apple devices (like iPhones, MacBooks) do classify RTP audio/video as UP-5 while some apple devices (like iPads) does not do these correct classification. Windows devices by default does not do these classification on its wireless frames.
3. I think RTP traffic will mark with same UP values & hence no differentiation between audio or video as long as it use same RTP port ranges (16384-32767)
4. same as point # 3
I have done testing with few different types of BYOD with Cisco jabber installed on it. Have a look at below post which summarized my test results. It may help you to understand this better.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
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