what does it mean? (message in syslog )

[federico_3]

I have set three systems as ntp peer synchronizer for all the UNIX network.
In the syslog i'm getting:
Mar 2 06:56:26 CAS_BKP xntpd[980]: sendto(168.202.2.12): No route to host
Mar 2 06:56:52 CAS_BKP xntpd[980]: sendto(168.202.2.52): No route to host
Mar 2 07:09:06 CAS_BKP xntpd[980]: sendto(168.202.2.117): No route to host

what does it mean?


Federico

[Steven Sim Kok Leong]

Hi,

Can CAS_BKP ping 168.202.2.12/.52/.117?

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

[federico_3]

we noticed last night that response from CAS_BKP was very slow. This morning the situation was same. Simple ping operation from various platforms (PC, other unix servers) often failed with time-out (usually less than 10 ms). The problem disappeared at around 8:30.

[Steven Sim Kok Leong · Accepted solution]

Hi,

I assume that you are pinging on the same network, not across routers.

Look at your network interface statistics via lanadmin and identify if there were a considerable number of error packets.

Similarly, look at your interface via netstat -i to identify if there were any ICMP or TCP/UDP connection drops etc.

It could meant that your network load is really high during that period either due to legitimate or illegitimate traffic. To verify, look through your nettl traces and syslog (if inetd -l has been enabled) for erratic traffic.

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com