Re: ping hostname failed while ping IP_Address working Options

From: Muhammad Salman (salmanfaheem@gmail.com)
Date: Fri Aug 10 2007 - 00:43:37 EDT


BismillahirRehmanirRahim

Hi All,

Just wanted to update you all about the status of this problem.

Alhumdolillaah, its working fine now.

All i did is to add the /etc/inet/hosts files entries in /etc/inet/ipnodes.

previously ipnodes file was as below:

------------------------------------------------
[root@prod-01 /]# more /etc/inet/ipnodes
#
# Internet host table
#
::1 localhost
127.0.0.1 localhost
------------------------------------------------

I checked the ipnodes of other SunFire Servers they are same as above.
and they are able to ping other hosts mentioned in /etc/hosts using their
hostname.

So Still i am not sure what was the actual problem. The O/s is Solaris 9:

SunOS prod-01 5.9 Generic_118558-28

 The /etc/nsswitch.conf file is as follow:

------------------------------------------------------------------------------
# /etc/nsswitch.dns:
#
# An example file that could be copied over to /etc/nsswitch.conf; it uses
# DNS for hosts lookups, otherwise it does not use any other naming service.
#
# "hosts:" and "services:" in this file are used only if the
# /etc/netconfig file has a "-" for nametoaddr_libs of "inet" transports.

passwd: files
group: files

# You must also set up the /etc/resolv.conf file for DNS name
# server lookup. See resolv.conf(4).
hosts: files dns
ipnodes: files
-----------------------------------------------------------------------------

The output of getent hosts host_name was okay.

If anyone get some clue regarding this issue then let me know.

Thanks for all who tried to help me out. i really appreciate them.

Your Junior Admin
Salman

On 8/3/07, Andy Bird <Andy.Bird@fife.gov.uk> wrote:
>
> Hi Muhammad,
> Hosts file should be mytest 10.54.23.1, no = sign
> it sees that host as hostname=mytest try hosts file like
> mytest 10.54.23.1
> hostname2 10.54.23.1
>
> then ping mytest should work.
>
> Andy Bird.
>
>
> >>> "Muhammad Salman" <salmanfaheem@gmail.com> 02/08/2007 17:54 >>>
> BismillahirRehmanirRahim
>
> Hi Admins,
>
> i am facing a strange problem in one of our SunFire v215 Servers.
>
> the ping to the hostname of the Server and ping to the hostname of any
> other server in /etc/hosts fail.
>
> but if you ping with IP_Adress it get success. i.e.
>
> hostname=mytest ; IP=10.54.23.1 , hostname2=mydev ; IP2=10.54.23.2
>
> ping mytest
> [ failed ]
>
> ping 10.54.23.1
> [success]
>
> ping mydev
> [ failed ]
>
> ping 10.54.23.2
> [ success]
>
> I dont know why its unable to resolve hostname from /etc/hosts.
>
> i didnt find any error in /var/adm/messages
>
> its very urgent, hope to hear soon from you.
>
> Your Junior Admin
> Salman
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