I added server ipv6 / 64. Ping6 works for google.com.But as IPV6ADDR_SECONDARIES, almost all of what I have added does not work.[root@server ~]# ping6 google.comPING google.com(fra15s10-in-x0e.1e100.net) 56 data bytes64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=1 ttl=57 time=47.9 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=2 ttl=57 time=47.9 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=3 ttl=57 time=47.9 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=4 ttl=57 time=48.0 ms^C--- google.com ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3945msrtt min/avg/max/mdev = 47.943/47.980/48.019/0.220 msI randomly created ipv6.Ex: ipv6adress:XXXX:XXXX:XXXX:XXXXI also created 3K. Only 110 workedI created the IPv6 address: ipv6adress::X - ipv6adress::XXXXIt worked no more than 150working IPV6ADDR_SECONDARIES:[root@server ~]# ping6 -I 2a03:2100:0:12::7b google.comPING google.com(fra15s10-in-x0e.1e100.net) from 2a03:2100:0:12::7b : 56 data bytes64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=1 ttl=57 time=50.9 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=2 ttl=57 time=52.2 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=3 ttl=57 time=50.6 ms64 bytes from fra15s10-in-x0e.1e100.net: icmp_seq=4 ttl=57 time=58.3 ms^C--- google.com ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3399msrtt min/avg/max/mdev = 50.661/53.061/58.308/3.097 msnot working IPV6ADDR_SECONDARIES: (I expect, but I cannot get results.)[root@server ~]# ping6 -I 2a03:2100:0:12:3515:fd11:5c82:2d7e google.comPING google.com(fra15s10-in-x0e.1e100.net) from 2a03:2100:0:12:3515:fd11:5c82:2d7e : 56 data bytes^C--- google.com ping statistics ---26 packets transmitted, 0 received, 100% packet loss, time 25534msBut it is pinging like this.[root@server ~]# ping6 2a03:2100:0:12:3515:fd11:5c82:2d7ePING 2a03:2100:0:12:3515:fd11:5c82:2d7e(2a03:2100:0:12:3515:fd11:5c82:2d7e) 56 data bytes64 bytes from 2a03:2100:0:12:3515:fd11:5c82:2d7e: icmp_seq=1 ttl=64 time=0.034 ms64 bytes from 2a03:2100:0:12:3515:fd11:5c82:2d7e: icmp_seq=2 ttl=64 time=0.083 ms64 bytes from 2a03:2100:0:12:3515:fd11:5c82:2d7e: icmp_seq=3 ttl=64 time=0.050 ms64 bytes from 2a03:2100:0:12:3515:fd11:5c82:2d7e: icmp_seq=4 ttl=64 time=0.041 ms^C--- 2a03:2100:0:12:3515:fd11:5c82:2d7e ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3493msrtt min/avg/max/mdev = 0.034/0.052/0.083/0.018 msThose who do not work are very heavy. Not connected to the sites. I do not get a result.My system Centos 6.9(final) 12 cpu 32gb ram/etc/sysconfig/network-scripts/ifcfg-eth0:DEVICE=eth0TYPE=EthernetUUID=15edbe41-c655-4bee-a309-6973bff8e6bbONBOOT=yesNM_CONTROLLED=yesBOOTPROTO=noneHWADDR=00:0C:29:F7:46:61IPADDR=89.**.**.***PREFIX=27GATEWAY=89.**.**.***DNS1=8.8.8.8DNS2=8.8.4.4DEFROUTE=yesIPV4_FAILURE_FATAL=yesIPV6INIT=yesNAME=System eth0IPV6ADDR=2a03:2100:0:12::/64IPV6_DEFAULTGW=2a03:2100:0:12::1IPV6FORWARDING=noIPV6_AUTOCONF=noIPV6ADDR_SECONDARIES=2a03:2100:0:12:XXX:XXXX:XXXX:XXXX 2a03:2100:0:12:XXX:XXXX:XXXX:XXXX 2a03:2100:0:12:XXX:XXXX:XXXX:XXXXMy settings are that wayIPV6ADDR_SECONDARIES=2a03:2100:0:12:XXX:XXXX:XXXX:XXXX/64 2a03:2100:0:12:XXX:XXXX:XXXX:XXXX/64orIPV6ADDR_SECONDARIES=2a03:2100:0:12:XXX:XXXX:XXXX:XXXX/64 \2a03:2100:0:12:XXX:XXXX:XXXX:XXXX/64I have tried them but the result is the same.
Centos ipv6 secondaries not working
centos;ipv6