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AP 3820 Can't Process Certain Calls (Doc ID 2045459.1)

Last updated on AUGUST 03, 2022

Applies to:

Acme Packet 3820 - Version S-Cx6.3.x to S-Cx6.4.x [Release S-Cx6.0]
Information in this document applies to any platform.


We encountered an issue with our production AP3820 HA nodes is having trouble processing call from certain source IP.
Here is a scenario of our setup.

We setup 2 endpoints pointed to the same SIP interface: 172.xx.xx.x in our production AP3820
When the call is made from one EndPoint (, the call gets through and process properly.
However, call failed when the call is made from another source(

What we could not figure out is why does ACME return a 404 Not Found SIP response to the same exact, SIP request URI sent to it.
And the only distinction we see between the two separate INVITE is the source IP and FROM-Header.


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