ping time out

[mark.M]

server : rp7420
os : 11.11
env : cisco router is cluster.

rp7420 normal running. but suddenly ping is not gwteway.
when /sbin/init.d/net start => ping normal.
netstat -in and -rn message is normal.
log is normal and not found error message.
please help me.

[Peter Godron]

Mark,
could you please clarify where in your log the error occors. What are the symtoms of the problem.

[Abhijit P.]

Hi mark...

Could you please clearify the problem ....

Not able to understand what exactly is the error that you get and where do you get the error i.e. whether in any of the log file or etc..

Regards,
Abhijit

[Bharat Katkar]

This is what i see in the attached file:
------------------------------------------
Cause: The cabinet's 48V power has fallen below an acceptable lower threshold.

Action: Contact HP Support personnel to troubleshoot problem.
------------------------------------------
I think it's time to HP Support because look like your power supply unit is in problem.

Regards,

[Bill Hassell · Accepted solution]

Your Cisco router may have been configured to stop responding to pings (a fairly common security setting). You may have the dead gateway detection feature enabled. Verify this with:

ndd -get /dev/ip ip_ire_gw_probe

If you get "1" in rfesponse, the gateway detection probe is running and will disable your route to the Cisco that is not replying. Turn off this feature with:

ndd -set /dev/ip ip_ire_gw_probe 0

And to make the change permanent for the next reboot, edit the file: /etc/rc.config.d/nddconf and add:

TRANSPORT_NAME[0]=ip
NDD_NAME[0]=ip_ire_gw_probe
NDD_VALUE[0]=0

Note that if you are not up to date on patches, ndd fails to work correctly with the nddconf file (ndd -c). Patch PHNE_33159 (and dependent patches) will fix this problem. This can prevent ndd from making the required settings on reboot.