Why these messages are coming?

Hello,

My Asterisk server is running fine. But, I am getting these below messages once in a while. At that time, calls are not connecting. When I call to another number, another number is ringing. The call is not establishing, even though the other person is answer the phone. What might be the reason?

  1. Retransmission timeout reached on transmission 34010857-5060-3@BA.BA.BA.BBD for seqno 20 (Critical Response)
  2. Hanging up call 34010857-5060-3@BA.BA.BA.BBD - no reply to our critical packet
    Remote host can’t match request CANCEL to call '000fbc240e583064395a913238d23331@172.131.2.123:5060
  3. Retransmission timeout reached on transmission 033da9e3741305006eb41a287d57cbf2@172.131.2.123:5060 for seqno 102

“chan_dahdi.so” file is existed in /usr/lib64/asterisk/modules/. But, when I restart the server, I am getting the below message in log file:
Error loading module ‘chan_dahdi.so’

Any help would be appreciated.

Thanks in advance.
Mouli

  1. insufficient information. Typically firewall misconfiguration, but can be due to broken peers.

  2. as (1)

un-numbered) broken peer.

  1. as (1), but the packet wasn’t a critical one.

You will need to capture the SIP exchanges involved (sip set debug on). It is best to do this to the full log, rather than the console, as they overflow the console history. You will need to provide detailed information about your network topology for people here to be able to interpret them.,