IX5000 to IX5000 Video Call Quality Issue

[Scott Hanson]

Has anyone seen a situation where IX5000 to IX5000 calls have poor video quality even though QoS is present?  IX5000 to any other unit works perfectly.

Also, during a packet capture, Wireshark was saying these packets were Skype packets.  Is that normal or could the conversation between these 2 be using Skype for Business somehow.

Thanks,

replies rated.

[Patrick McCarthy]

You mention that QoS is present - but do you have enough bandwidth? An IX to IX will essentially be three calls, so it will be using roughly three times the bandwidth of an IX to an MX800 for example. QOS will not solve a lack of bandwidth problem. 

Try using a lower call rate - see if that helps. 

Wireshark is incorrectly identifying those packets, the IX does not use Skype type of traffic. I don't know if that's normal for Wireshark or not. 

[JMolina16]

hi

I have the same issue and there is not problem with the bandwith or network . Did your solve this problem or still is present?

Thank you

[Anurag Srivastava]

Hi,

This issue is mostly due to network issues.
Please check if you have prioritise the video traffic with proper QOS markings.
Also you need to check the jitter values that should not be more than 60ms.
You can also try disabling the H265, you can do it from CUCM IX phone page as well. Or you can do it from CLI with below command-

set video h265 { enable | disable 

You can also refer the below link for mare details regarding bandwidth and QOS requirement-

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/cac.html

Thanks

Please rate if it is helpful.

[Sergio Quezada]

We did have a similar issue. Below was the fix for IX5000 to IX5000 Good Luck IX5000 Video – marked as AF41 • Good on all 3 screens Audio -- marked as EF • Good on center screen • Bad on left screen voice flow (15-20% packet lost) • Not auditable on right screen voice flow (60% packet lost) QoS policy Cisco standard/recommend configuration • Trust at access layer • Remark at distribution layer • Policing/Shaping at Distribution and Core switch policy-map Mark Vlan class Voice-Bearer police flow 256000 16000 conform-action set-dscp-transmit ef exceed-action drop police 50000000 1250000 conform-action set-dscp-transmit ef exceed-action drop