[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

[Xiaoqiang Hu]

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 at under.test.com         UA12 at under.test.com
contact-uri :                        UA11 at node.under.test.com    UA12 at 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
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