I recently got a new computer at work and I'm having trouble connecting to it from other computers. I can access other computers from it, just not the other way around. I checked all the usual suspects: Firewall, AV, etc. Nothing was out of the ordinary.
After troubleshooting for a while I stumbled upon an unusual IP problem. I pinged my computer by name from another machine and it resolved to a different IP address than what the computer reported using IPConfig. I dug further using arp and found that the MAC address associated with the IP address being pinged didn't match the MAC address of any of the network devices on my computer (all but one were disabled anyway). I asked a coworker to ping my machine to confirm my findings. Same result.
This leads me to think there is another computer with the same machine name as mine somewhere on the network. My former computer had the same machine name but is now sitting, turned off, on an IT department desk awaiting whatever fate they have in store for it. I never had this problem with it. Anyway from my own past experiences I would have expected any machines with the same name to be annoying their users with messages about name clashes.
I brought up my problem with IT. They recited some incantations over the domain controller, DHCP and DNS servers then told me to flush my dns cache and renew my IP address on the machines I was working with but it was to no avail. At this point I'm just waiting on them to look into the matter further.
I do have several applications that could potentially muck with the network devices. VMWare, VirtualBox and a VPN app, all of which are dormant at the moment. I had all the same apps on my old machine and never experienced this kind of problem so I don't think its any of them.
Is there anything else I can do to track down the source of this problem?
I took simkill's advice and tried to force a DNS update. After waiting 15 minutes I flushed the DNS cache on the machines and tried pinging again. Something I failed to mention before... the pings do not time out as you would expect if they were resolving to an offline host. I am getting a response from the mystery machine. Anyway, the ping gave me the same results as before. I decided to try a tracert (which attempts to resolve an IP address to a host name) using the IP addresses of both machines. They both resolve to the same host name.