[ntp:questions] help needed for ntpd ipv6 setup

Marc-Andre Alpers m-a.alpers at web.de
Mon Nov 15 12:07:45 UTC 2010


Steve Kostecke wrote:

> Is the ipv6 module loaded?
IPv6 is build into the kernel.

> Do any of your network interfaces hae IPv6 addresses?
Yes, i can tracert IPv6 hosts.

traceroute to www.heise.de (2a02:2e0:3fe:100::7), 30 hops max, 40 byte packets
 1  2001:41d0:2:1aff:ff:ff:ff:ff  7.345 ms * *
 2  2001:41d0::792  16.711 ms * *
 3  2001:7f8::3012:0:1  9.224 ms  9.153 ms  9.146 ms
 4  2a02:2e0:1::1e  9.691 ms  9.586 ms  9.580 ms
 5  2a02:2e0:3fe:100::7  9.964 ms  9.932 ms  9.852 ms
#

And i can reach my server via IPv6 on SSH and HTTP.

> Do you have IPv6 connectivity to your remote time servers?
I have ipv6.remco.org in my config. But NTP will connect with this server.

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*213.251.128.249 .GPS.            1 u   10   64  377    0.538   -0.029   0.091
+192.87.106.2    .GPS.            1 u    9   64  377   11.162    2.495   0.158
+192.87.36.4     .GPS.            1 u    7   64  377   14.561    2.473   0.171
-193.67.79.202   .PPS.            1 u    5   64  377   13.194   -0.902   0.096
-193.79.237.14   .PPS.            1 u    2   64  377   12.219   -0.883   0.122
-80.127.4.179    .GPS.            1 u    5   64  377   22.266    4.001   0.179
 2001:888:1031:: .INIT.          16 -    -   64    0    0.000    0.000   0.000
#

But ntpdate works fine.

#ntpdate -q ipv6.remco.org
server 2001:888:1031::1, stratum 1, offset 0.002860, delay 0.05827
15 Nov 12:34:07 ntpdate[6869]: adjust time server 2001:888:1031::1 offset
0.002860 sec
#

Best regards
Marc-Andre Alpers




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