[SR-Users] SIPv6 UA Can't receive a 420 (Bad Extension) response from openser register server after sending Registrar with Non-supported option-tag in Require filed

Hi all, SIPv6 UA Can't receive a 420 (Bad Extension) response from openser register server after sending Registrar with Non-supported option-tag in Require filed. The details can be as follows: 1 Test topology: NUT(REG && PX) UA11 UA12 DNS | | | | IP : 3ffe:501:ffff:50::50 3ffe:501:ffff:1::1 3ffe:501:ffff:2::2 3ffe:501:ffff:4::1 aor-uri : ss.under.test.com UA11(a)under.test.com UA12(a)under.test.com contact-uri : UA11(a)node.under.test.com UA12(a)node11.under.test.com 2 tcpdump file can be seen in "19 SIP Registrar- REGISTER request with two Contact header values and update failure.pcap" attachment 3 openser configuration file can be seen in "openser.cfg" attachment How can I modify the configuration file if I want to receive 420 (Bad Extension) ? -------------------------------------- Regards! Hu xiaoqiang