cluther wrote:
> On Jan 15, 2009, at 8:08 PM, sergeymasushko wrote:
>
> > I see a lot of events/alerts about 'ip bla-bla-bla down'.
> > I know that these devices are UP and i can ping them via zencommand
> > 'Command: ping -c2 ${device/manageIp}'. I've tried to restart
> > zenping daemon but it does not help.
> > What can be the cause of the problem?
> >
>
> I've seen occurrences where firewalls that are capable of deep packet
> inspection specifically drop the ICMP echo request packets sent by
> zenping because they don't contain the same kind of payloads seen in
> ordinary ICMP echo requests sent by the ping command line utilities in
> common operating systems.
>
> The best thing to do if you think Zenoss is incorrectly marking
> devices as ping down when you know that they are not would be to
> capture the packets with tcpdump or wire shark or whatever sniffer
> you're accustomed to using. Typically you will see that Zenoss sends
> the ICMP echo request, but never gets the ICMP echo reply. Normally
> this is due to a firewall trying to be too smart.
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Is there a difference in requests between zenping daemon and zencommand ?
I see ping responses if do a command (click on triangle 'Run Commands' -> ping)
but zenoss show me that the device is down.
Command Output
Command: ping -c2 ${device/manageIp}
Description:
Output:
==== mydevice ====
ping -c2 xxx.xx.xx.xx
PING xxx.xx.xx.xx (xxx.xx.xx.xx): 56 data bytes
64 bytes from xxx.xx.xx.xx: icmp_seq=0 ttl=64 time=1.469 ms
64 bytes from xxx.xx.xx.xx: icmp_seq=1 ttl=64 time=1.374 ms
DONE in 1 seconds on 1 targets
-------------------- m2f --------------------
Read this topic online here:
http://forums.zenoss.com/viewtopic.php?p=30223#30223
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