DHCP issue

My physical PC's (XP and Win7)  don't receive any IP addresses from DHCP server but all my virtual PC's connect to DHCP and can browse internet. I use ESXi5, my server is virtual DC, DNS and DHCP.  Any recommendations?

Thank you in advance,

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Zephyr ICTCloud ArchitectCommented:
Did something change in your network? Did it stop suddenly? How is the network build up, are these physical PC's behind a router or other layer3 device that should have DHCP helper enabled? ...

When you set a static IP, can you ping the DHCP server from these PC's then? Name resolution working?
swolff1ITAuthor Commented:
DHCP is on a virtual WIn 2008 server. There are several win7 virtual PC's (all on ESXi5) and physical PC's win7. It's intermittent, I can hard code one of the PC's and be able to ping DHCP, gateway and other devices then in a little while not being able to ping any or some of them. I need to add, that virtual pc's are more consistent and stable but not 100% either. I have to add that I was getting lots of "BAD ADDRESS" errors in DHCP that would fill up the whole scope within minutes, I found an XP box that caused this problem, as soon as I shut it down, errors stopped.
I noticed in the arp table, several devices have the same MAC addresses and this makes me nervous, I think there is something on the network that causes this. I'm not very comfortable with network scanners and not sure how to read the results. Thanks.
Zephyr ICTCloud ArchitectCommented:
Did you clone these virtual PC's? Maybe they all have the same MAC address because of cloning? You probably checked this already, but better to double check.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
swolff1ITAuthor Commented:
Found network device that was sending "bad pockets"   Thank you your recommendations.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.