[arm-allstar] IAX2 calltoken timestamp Message Floods - Dropping connections

[Lawrence Roney]

On our HamVoIP Pi 4 hub we have started seeing the following in the Asterisk message log about once a week.   The IP's are typically coming from various visiting nodes connecting to the hub; not from our established club repeaters.

[Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
[Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
[Oct 14 09:18:04] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
[Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
[Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx
[Oct 14 09:18:05] WARNING[368] chan_iax2.c: Too much delay in IAX2 calltoken timestamp from address 174.195.xxx.xxx

When the message flood occurs (> 200 per second), it causes all the connections to drop.  While most permalinks reestablish, other connections need to be manually reconnected.   This appears to be a recent manifestation and not related to any observed network issues at the hub site.  Any ideas on a root cause?

We are running:
Hamvoip Firmware Version - RPi2-3-4 Version 1.7-03 Allstar - September 12, 2022 - K4FXC
Hamvoip Allstar Version - Asterisk 1.4.23-pre.hamvoip-V1.7.1-04 app_rpt-0.327-01/22/2022
Linux Kernel Version - Linux version 4.19.65-1-ARCH (builduser at leming) gcc version 8.3.0 (GCC)) #1 SMP PREEMPT Fri Aug 9 23:29:04 UTC 2019

Thanks,

Lawrence - N6YFN
Henderson Amateur Radio Club
www.w7hen.org<http://www.w7hen.org>