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5 March 2026
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N 16:15 | Re-INVITE UDP fragmentation 6 changes history +2,984 [Admin (6×)] | |||
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16:15 (cur | prev) −2 Admin talk contribs | ||||
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16:14 (cur | prev) +66 Admin talk contribs | ||||
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16:11 (cur | prev) +50 Admin talk contribs | ||||
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16:05 (cur | prev) +5 Admin talk contribs | ||||
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16:05 (cur | prev) +97 Admin talk contribs | ||||
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15:56 (cur | prev) +2,768 Admin talk contribs Created page with "'''Problem'''<br> The client sends SIP re-INVITEs over UDP that exceed the standard MTU (e.g. 1529 bytes > 1500 bytes). The re-INVITE is fragmented at the IP layer. On your side, re-INVITEs do not appear in traces; the client receives no response, and the call ends. Initial INVITE is within MTU and works; only the larger re-INVITE is affected. <br> '''Root cause'''<br> Fragmented UDP packets are dropped by your NAT/firewall (or possibly by the server interface). Only..." | |||