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IIP ping problem

I have 2 PCs  and a third device all on the same network connected through an un-managed switch.  I can ping the third device from one PC but not the other.  Both PCs can ping a fourth device on the same network through the same switch and they can both ping each other.  Any suggestions on what might be the cause?  System is XP pro sp 3.
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FRW312
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FRW312
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3 Solutions
 
ajmehtaCommented:
turn off the firewall and try again.. if you get the same result, can you then check your router security setup for any IP or MAC based restrictions?
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tastasI.T.Commented:
On each computer, verify that the firewall is off as ajmehta had indicated.

Secondly, do an ipconfig /all and verify that the ip address is on the same network and the network mask, dns and gateway are identical since you indicate it's on the same lan network.
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ajmehtaCommented:
and if for some reason they are not on the subnet like tastas mentioned, manually enter ip/gateway/mask and see if it works.
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FRW312Author Commented:
the firewall is turned off.  The switch is an un-managed switch so there are no IP or MAC restrictions.

I need to check the sub mask setting as suggested.  I won't be able to do that until Tuesday.  thanks for your suggestions.
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TroyHrehirchukCommented:
you can also see if the devicies are showing up in the arp table of the machine at the dos prompt type "arp -a" to view the arp table entries after you ping them and then refresh the arp command again this will let you know if you are getting basic IP to mac address resolve at the lower level of the OSI model if they show up then you are dealing with an application/misconfiguration issue.
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FRW312Author Commented:
I checked the sub mask and it is the same as other devices on the network.

I checked the arp table and the mac address for the divice in question was there.  I did a -d to that specific address and it was deleted from the table when using -a parm.  I then did a  -a to that address and it came back with the mac address but still can't ping.  to get the mac address does it have to get a response from the device to add it to the table.  If so why get the mac address but no ping?
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MaximRCommented:
If you doubled checked the firewall settings, I suggest you try
the arp -a followed by ipconfig /flushdns on both computers with the problem.
Next you can try to reset the TCPIP layer with this command:
Netsh Winsock Reset (reboot and try pinging again)

one brutal way is to manually write in the host file with notepad as followed into :
C:\Windows\System32\drivers\etc\hosts
<ip address>        <machine name>

my last suggestion is to alway have a second command prompt with the ping -t <ip address> so you can verify if something is right.

Good luck!!!
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ajmehtaCommented:
have you enabled simple file sharing in windows xp?

and these are ALL xp sp3, right?  Or do we have the evil cousin Vista in the mix, or Win 7?
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TroyHrehirchukCommented:
Another very program to install to see if you are getting master browser lookups is to install wire-shark on the box that you cannot get the actual ping response from. when you fire it up it should be pretty silent just the odd master browser elections etc. when you ping the machine in question you should see a who has this ip address through arp resolution protocol and then will say tell local IP (whatever ip address you have binded to the machine your are pinging) the application is free to download and is a very useful tool for basic pings you will find that it will take you on tangents what does this do and head over to google to find out... lol sorry but its a fun program .... Another command prompt you can do is "route print" see what you have and compare those to the other routing tables on your network.
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FRW312Author Commented:
As strange as this may seem what finally fixed the problem is I tried switching to getting an IP address from the server which severed communications to all devices and then switched back to a fixed IP address.  Everything then communicated.   I did this on a hunch after trying most of the suggestions offered by the experts.  I will award points to multiple solutions as I a[[appreciate the effort extended in trying to help me.
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FRW312Author Commented:
As described in my last comment the problem was fixed by switching IP address mode to auto and back to manual.
Thanks again for the help
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