[asterisk-users] Asterisk 16.23.0 doesn't respond anymore

[Administrator]

Hi list,

we faced on 2 different asterisk servers an identical problem (16.23.0 
compiled as well as 16.2.1~dfsg-1+deb10u2 packaged for Debian Buster)

[lot of same before ...]
[2021-12-13 17:13:33] WARNING[3923454] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-20089 (type = 6, subclass = 11, 
ts=3879966, seqno=91)
[2021-12-13 17:13:38] WARNING[3923450] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-20089 (type = 6, subclass = 2, 
ts=3884984, seqno=92)
[2021-12-13 17:13:40] WARNING[3923447] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-24830 (type = 6, subclass = 11, 
ts=3919975, seqno=100)
[2021-12-13 17:13:43] WARNING[3923448] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-20089 (type = 6, subclass = 11, 
ts=3889966, seqno=93)
[2021-12-13 17:13:47] WARNING[3923450] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-24830 (type = 6, subclass = 2, 
ts=3926989, seqno=101)
[2021-12-13 17:13:50] WARNING[3923453] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-24830 (type = 6, subclass = 11, 
ts=3929974, seqno=102)
[2021-12-13 17:13:53] WARNING[3923447] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-20089 (type = 6, subclass = 11, 
ts=3899966, seqno=94)
[2021-12-13 17:13:59] WARNING[3923448] chan_iax2.c: Max retries exceeded 
to host 10.99.3.24 on IAX2/33388917474-20089 (type = 6, subclass = 2, 
ts=3905984, seqno=95)
[lot of same after ...]

and asterisk doesn't respond anymaore. Logs on console and in files are 
written but iax as well as pjsip doesn't respond, running calls are dead.

The above errors appears only for this one IAX trunk, no info about the 
others but on their side registrations is gone and they try to 
reconnect. Same for PJSIP client, they try to reconnect but no answer 
from asterik.

Any clue ?
-- 
Daniel