Keep using old ipv6 address when preferred lifetime already out date

[DragonCat1]

6: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    inet6 240e:390:ca8:4570:20c:29ff:fe3c:7cd6/64 scope global dynamic noprefixroute
       valid_lft 259132sec preferred_lft 129532sec
    inet6 240e:390:cae:390:20c:29ff:fe3c:7cd6/64 scope global deprecated dynamic noprefixroute
       valid_lft 224876sec preferred_lft 0sec
    inet6 fe80::20c:29ff:fe3c:7cd6/64 scope link
       valid_lft forever preferred_lft forever

root@OpenWrt:~# netstat -unp
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
udp        0      0 240e:390:cae:390:20c:29ff:fe3c:7cd6:33893 xxx:51821 ESTABLISHED 7230/speederv2_amd6
udp        0      0 240e:390:cae:390:20c:29ff:fe3c:7cd6:46719 xxx:51821 ESTABLISHED 7231/speederv2_amd6

When public ipv6 address changed, the router will make an announcement to client set preferred lifetime to 0，and the connection will be broke and need restart manually

[wangyu-]

thanks for reporting

at the moment the program is indeed not making use of this kind of advanced ipv6 features

[myp0704]

有办法检测ipv6地址更新后重新连接新ip吗？
或增加一个参数 以ping的方式是否连通
然后重新以新ip连接

[leohearts]

I'm also in this problem and my only workaround is to restart it after connection loss :(

[wangyu-]

Option 1, you write a script to restart udpspeeder when this happens.

Option 2, chain udp2raw in between:

CLIENT--->udpspeeder->udp2raw-------------------------------------->udp2raw-->udpspeeder---->SERVER

Udp2raw have the ability of changing IP without lossing connection. Upper level connection will be protected by udp2raw and stay valid.