Am 22.11.2014 um 22:01 schrieb Erwan David:
> Le 22/11/2014 21:57, mad a écrit :
>> Hi!
>>
>> I'm stumped. On my home network all my Debian installations _only_ use
>> the router as clock source.
>>
>> # ntpq -p
>> remote refid st t when poll reach delay offset jitter
>> ========================================================================
>> fritz.box X.Y.Z.A 3 u - 64 1 1.874 0.153 0.052
>>
>> I use the default ntp configuration and other Debian installations
>> "directly on the internet" use all four clock sources
>> (0.debian.pool...., 1.debian.pool...).
>>
>> Why is that? It seems to have something to do with IPv4 and IPv6. If I
>> start ntpd with '-4 -n' ntpq exists with 'Connection refused'. If I
>> start it with '-6 -n' ntpq says 'No association ID's returned'.
>>
>> I'm thoroughly confused.
>>
>> Does anyone knows what's happening?
>>
>> TIA
>> mad
>>
>>
>
> Does your router announce itself as ntp server in the dhcp answer ?
No, at least that is what I read from the answer (removed several lines):
# dhcpdump -i eth0
IP: A.B.C.25 > A.B.C.1
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 4cf07154
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 50 ( 4) Request IP address 0.0.0.0
---------------------------------------------------------------------------
TIME: 2014-11-23 15:33:49.014
IP: A.B.C.1 > 255.255.255.255
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 4cf07154
SECS: 0
FLAGS: 7f80
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: A.B.C.1
GIADDR: 0.0.0.0
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 6 (DHCPNAK)
---------------------------------------------------------------------------
TIME: 2014-11-23 15:33:49.014
IP: A.B.C.25 > A.B.C.1
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 4cf07154
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 7 (DHCPRELEASE)
---------------------------------------------------------------------------
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