ntpq: write to localhost failed: Network is unreachable

[Matthew Seaman]

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On 16/06/2010 18:15:32, Anton Shterenlikht wrote:
> On Wed, Jun 16, 2010 at 06:08:35PM +0100, Matthew Seaman wrote:
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>> On 16/06/2010 17:59:10, Anton Shterenlikht wrote:
>>> After a recent upgrade to r209156 I get this error:
>>>
>>> $ ntpq -p
>>> ntpq: write to localhost failed: Network is unreachable
>>>
>>> Please advise
>>
>> What does 'ifconfig -a' and 'netstat -rn' say?
> 
> $ ifconfig -a
> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
>         ether 00:13:21:5b:05:1c
>         inet 137.222.187.28 netmask 0xffffff00 broadcast 137.222.187.255
>         inet6 fe80::213:21ff:fe5b:51c%em0 prefixlen 64 scopeid 0x1 
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect (1000baseT <full-duplex>)
>         status: active
> em1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
>         ether 00:13:21:5b:05:1d
>         media: Ethernet autoselect (100baseTX <full-duplex>)
>         status: active
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>         options=3<RXCSUM,TXCSUM>
>         inet 127.0.0.1 netmask 0xff000000 
>         inet6 ::1 prefixlen 128 
>         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 
>         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> 
> $ netstat -rn
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags    Refs      Use  Netif Expire
> default            137.222.187.250    UGS         0    65512    em0
> 127.0.0.1          link#3             UH          0      293    lo0
> 137.222.187.0/24   link#1             U           0    10861    em0
> 137.222.187.28     link#1             UHS         0        0    lo0
> 
> Internet6:
> Destination                       Gateway                       Flags      Netif Expire
> ::/96                             ::1                           UGRS        lo0
> ::1                               ::1                           UH          lo0
> ::ffff:0.0.0.0/96                 ::1                           UGRS        lo0
> fe80::/10                         ::1                           UGRS        lo0
> fe80::%em0/64                     link#1                        U           em0
> fe80::213:21ff:fe5b:51c%em0       link#1                        UHS         lo0
> fe80::%lo0/64                     link#3                        U           lo0
> fe80::1%lo0                       link#3                        UHS         lo0
> ff01:1::/32                       fe80::213:21ff:fe5b:51c%em0   U           em0
> ff01:3::/32                       ::1                           U           lo0
> ff02::/16                         ::1                           UGRS        lo0
> ff02::%em0/32                     fe80::213:21ff:fe5b:51c%em0   U           em0
> ff02::%lo0/32                     ::1                           U           lo0
> 
> 
> 
>>  What happens if you try and ping localhost?
> 
> $ ping -c5 localhost
> PING localhost (127.0.0.1): 56 data bytes
> 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.109 ms
> 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.103 ms
> 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.060 ms
> 64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.059 ms
> 64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.059 ms
> 
> --- localhost ping statistics ---
> 5 packets transmitted, 5 packets received, 0.0% packet loss
> round-trip min/avg/max/stddev = 0.059/0.078/0.109/0.023 ms

Nothing obviously wrong there.  Perhaps ntpd is not running?
(Not sure quite why that should cause an error message about
reachability of localhost: I suppose it's not completely unreasonable
though.)

If ntpd is running, then try restarting it.  If the problem still
persists, then it looks like you've found a bug.

	Cheers,

	Matthew

- -- 
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
JID: matthew at infracaninophile.co.uk               Kent, CT11 9PW
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