Dear Team


I have a strange issue and I need you thoughts.



We have an installation with 1700 devices registered on an OpenSIPs 2.4 latest 
running on Centos 7 on a XenServer Virtualization. For some reason, some 
replies from OpenSIPs to the devices is fragmented to 48b. Is that something 
that controlled by OpenSIPs or OS? Why could something like that be occurred?



Example of normal packet



09:43:12.375943 IP 172.21.111.10.5060 > 172.24.4.14.5070: SIP: SIP/2.0 200 OK

E....Y@.@.....o

............SIP/2.0 200 OK

Via: SIP/2.0/UDP 
172.24.4.14:5070;received=172.24.4.14;branch=z9hG4bKb65a2607229aaf9b5;rport=5070

From: "1110401" <sip:1110401@172.21.111.10>;tag=199725f5b3

To: "1110401" 
<sip:1110401@172.21.111.10>;tag=4074.edeca69b8a0dee9664e1f1fc59897b8c

Call-ID: 450061df04238489

CSeq: 1782007243 REGISTER

Contact: <sip:9590401@172.24.4.14:5070;transport=udp>;q=1;expires=600

Content-Length: 0



And just after that other replies to other device fragmented



09:43:12.483483 IP 172.21.111.10.5060 > 10.122.2.71.5060: SIP

E.. ..@.@._...o



z.G......'.....................

09:43:12.483563 IP 172.21.111.10.5060 > 172.29.20.26.5070: SIP

E.. ..@.@.v...o

...........t....................

09:43:12.483597 IP 172.21.111.10.5060 > 172.29.19.25.5080: SIP

E.. ..@.@..Y..o

...........s....ONS sip:172.21.1

09:43:12.483632 IP 172.21.111.10.5060 > 10.122.7.44.48577: SIP

E.. ..@.@.....o



z.,......,.....2.0 200 OK

Via:





Thank you for your thoughts in advance



Antonis Psaras



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