Jitter when making Phone calls

nsrini1991 — Thu, 18 Mar 2021 05:53:54 GMT

Hi Experts

The client is reporting Latency/Jitter when making the phone calls which is traversing through the PA firewalls 5220. We've QOS policy configured for the RTP/SIP applications (User/Zone is set to 'any') with Class 1(real-time) . Also, we've configured a Guaranteed Egress of 5000Mbps for this Class1 traffic under QOS profile which is applied on the Egress Interface to ensure this is classified on high priority which is reflecting when checking under statistics as well.

Can someone please assist what to check and how to proceed to take it up further. Thanks in advance.

Re: Jitter when making Phone calls

kiwi — Thu, 18 Mar 2021 11:57:46 GMT

Hi @nsrini1991 ,

A good place to start is the grab the traffic for analysis and check for drop packets.

The following KB has an example on what information to collect exactly:

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000CmUiCAK

Hope this helps,

-Kiwi.

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Jitter when making Phone calls

Re: Jitter when making Phone calls