2 PCs on same WiFi network can't ping each other, and a CRAZY response from CMD ping! :)

Mark Miles
Mark Miles used Ask the Experts™
on
I have 2 PCs that are both connected to the same WiFi network.  Both PCs are on the same work network, both have the same workgroup name and I have toggled network sharing off and on - on both of the devices.

Neither can ping the other.  However, where it gets strange here... If I run simultaneous cmd pings of each other, #1 PC starts successfully pinging the other, but stops if I stop the ping attempts from the other PC to it.  #2 PC pings never resolve.

Both devices are Dell Optiplex 3030AIO and on Windows 7 Pro, Service Pack 1
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Darrell PorterEnterprise Business Process Architect

Commented:
1. Is this your wireless network or a company's wireless network.  Either way, it is possible the wireless network is configured to not permit communications between attached devices.
2. Is the Windows Firewall enabled/active on either device?
3. When you configured the network on either device, did you allow the devices to be discoverable on the network?  If you are unsure or you denied this access, forget the networks and, when asked, allow the devices to be discoverable by other devices on the network.

Author

Commented:
Hey Darrell, thanks for the response.
  1. 1. Company wireless network, no this would not be the case as they were communicating a month or so ago (sharing printers)
  2. 2. Windows firewall is off on both devices
  3. 3. Both devices are discoverable
If I run simultaneous cmd pings of each other, #1 PC starts successfully pinging the other, but stops if I stop the ping attempts from the other PC to it.

It's probably seeing the other PCs ping packet and thinks it's the echo reply to ping.  Likely there's a leakage in the routing of the packets that wasn't meant to actually traverse through the wifi network.
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Enterprise Business Process Architect
Commented:
I would still forget the networks on both devices and re-establish the connection.  It is possible one or both of them became somehow corrupt.
When was the last time either of these devices were rebooted?

Author

Commented:
@serialband - thanks for that information, I did not know that
@darrellporter - I will try this now and report back the results.  They each said they had been restarted today prior to emailing me, but I did not restart them so I can't say positively.

Author

Commented:
@Darrell, you are the man!  Very basic, and it was the fix.  The router must unexpectedly restarted overnight and they obviously did not restart as they told me.  A quick forget and reboot, re-connection cleared it up!
Darrell PorterEnterprise Business Process Architect

Commented:
Glad to be of help!

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