<!-- Kamailio Project uses GitHub Issues only for bugs in the code or feature requests. Please use this template only for bug reports. If you have questions about using Kamailio or related to its configuration file, ask on sr-users mailing list: * https://lists.kamailio.org/mailman3/postorius/lists/sr-users.lists.kamailio… If you have questions about developing extensions to Kamailio or its existing C code, ask on sr-dev mailing list: * https://lists.kamailio.org/mailman3/postorius/lists/sr-dev.lists.kamailio.o… Please try to fill this template as much as possible for any issue. It helps the developers to troubleshoot the issue. Note that an issue report may be closed automatically after about 2 months if there is no interest from developers or community users on pursuing it, being considered expired. In such case, it can be reopened by writing a comment that includes the token `/notexpired`. 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I found pcscf error log below periodically when try to ims register : 2024-05-28T13:32:30.952258+08:00 spid-YL-CLU6L-V1 pcscf[13401]: ERROR: {1 750211591 REGISTER 750211591_1277609064(a)172.60.5.12} cdp [routing.c:296]: get_routing_peer(): get_routing_peer(): No connected DefaultRoute peer found for app_id 16777236 and vendor id 10415. 2024-05-28T13:32:30.952346+08:00 spid-YL-CLU6L-V1 pcscf[13401]: ERROR: {1 750211591 REGISTER 750211591_1277609064(a)172.60.5.12} cdp [diameter_comm.c:144]: AAASendMessage(): AAASendMessage(): Can't find a suitable connected peer in the routing table. And the RX reconnection appeared periodically ,which could be found in packet capture: 2024-05-28T13:32:49.595500+08:00 spid-YL-CLU6L-V1 pcscf[13372]: INFO: cdp [receiver.c:1006]: peer_connect(): peer_connect(): Trying to connect to 127.0.0.9 port 3868 2024-05-28T13:32:49.595621+08:00 spid-YL-CLU6L-V1 pcscf[13372]: INFO: cdp [receiver.c:1106]: peer_connect(): peer_connect(): Peer pcrf.epc.mnc009.mcc460.3gppnetwork.org:3868 connected PCRF error log periodically : [diam] ERROR: pid:PSM/pcscf.ims.mnc009.mcc460.3gppnetwork.org in [fd_p_ce_handle_newCER@p_ce.c](mailto:fd_p_ce_handle_newCER@p_ce.c):1138: pcscf.ims.mnc009.mcc460.3gppnetwork.org: Rejecting new connection attempt while our state machine is in state 'STATE_SUSPECT' --> ### Troubleshooting #### Reproduction <!-- If the issue can be reproduced, describe how it can be done. Several volte mobile accessed into eNB, some of them made call and hung up periodically . After some time, ims registrations all failed. --> #### Debugging Data <!-- If you got a core dump, use gdb to extract troubleshooting data - full backtrace, local variables and the list of the code at the issue location. gdb /path/to/kamailio /path/to/corefile bt full info locals list If you are familiar with gdb, feel free to attach more of what you consider to be relevant. --> ``` (paste your debugging data here) ``` #### Log Messages <!-- Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> ``` (paste your log messages here) ``` #### SIP Traffic <!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> ``` (paste your sip traffic here) ```  ### Possible Solutions <!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. --> If I restarted pcscf, ims registration worked well.After some time ,the error occurred again. ### Additional Information * **Kamailio Version** - output of `kamailio -v` ``` (paste your output here) ``` kamailio v5.6.0 * **Operating System**: <!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `lsb_release -a` and `uname -a`) --> ubuntu server 18.04 ``` (paste your output here) ``` [Uploading ims-reg-fail (1).zip…]() -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3879 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3879(a)github.com&gt;