?
Solved

Why isnt my equipment communicating with our DC

Posted on 2011-03-07
24
Medium Priority
?
292 Views
Last Modified: 2012-05-11
I have a CNC Mill that is networked in order to gain access to a file folder share. Out of nowhere I can not connect to this file share with the account credentials from that machine. Permissions havent changed, Account isnt locked out. I can use the same credentials at a computer and log in just fine. What is interesting though is I can not ping our DC from that machine. I can ping other pieces of equipment but not our DC. I have only removed print drivers and printers from the DC this weekend. Nothing else that would effect it to my knowledge. I am running server 2008 64bit.
0
Comment
Question by:Johne75
  • 12
  • 7
  • 5
24 Comments
 
LVL 14

Expert Comment

by:JAN PAKULA
ID: 35061627
is dc and  cnc  mill on same subnet and vlan?
looks like connectivity problem - maybe some kind of firewall - or blocked ports on router

Jan MA CCNA
0
 

Author Comment

by:Johne75
ID: 35061642
yes on same subnet same lan
0
 
LVL 14

Expert Comment

by:JAN PAKULA
ID: 35061656
same vlan?
0
Creating Active Directory Users from a Text File

If your organization has a need to mass-create AD user accounts, watch this video to see how its done without the need for scripting or other unnecessary complexities.

 

Author Comment

by:Johne75
ID: 35061669
we do not have a vlan
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35061674
When you ping the DC from that machine are you pinding the IP or the DC name?

Is that machine using static IP or DHCP?
0
 

Author Comment

by:Johne75
ID: 35061688
pinged both didnt resolve either. DHCP
0
 
LVL 14

Expert Comment

by:JAN PAKULA
ID: 35061703
can you tracert from dc to cnc .
do arp-a tocheck if you mac is right one
if not arp -d (delete cached macs) and
ipconfig /flashdns
0
 
LVL 14

Expert Comment

by:JAN PAKULA
ID: 35061709
can you make reservation in dhcp to reserve ip for given mac address of cnc?
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35061745
When you ping the DC name from the machine, does it convert it to the IP address of the DC before it starts to attempt to ping?
0
 

Author Comment

by:Johne75
ID: 35061878
ok well now I am getting an echo request when I ping IP but when I ping DC name it says can not resolve. Still can not log in. Tried credentials on a computer and no problems logging in no problems accessing folder share.
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35061907
It appears that you have a DNS issue. If you ping the DC'c name and it cannot resolve, DNS is the issue. Run the IPCONFIG /ALL from a command prompt and look at what the machine has for its' DNS server. Is the DC in question also the DHCP server?
0
 
LVL 14

Expert Comment

by:JAN PAKULA
ID: 35061911
does you cnc is connected with you dns server?
0
 

Author Comment

by:Johne75
ID: 35061940
yes DC is DHCP also. When I do the IPconfig it says no DHCP available...if that were true we would be having problems all day long with the everything. right?
0
 

Author Comment

by:Johne75
ID: 35061977
Also I can Ping dc name just fine from another computer. Just not the mill
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35061995
The DHCP server leases its' addresses for a certain number of days, if DHCP just quit you may not see issues until those leases run out and new ones cannot be given.

Go to a non essential PC that is working and type IPCONFIG /RELEASE then IPCONFIG /RENEW and see if it can retrieve a new lease.
0
 

Author Comment

by:Johne75
ID: 35062184
The first several attempts for the renew it said destination host unavailable. Then it finally renewed
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35062188
On the CNC? or the test PC?
0
 

Author Comment

by:Johne75
ID: 35062194
TEST PC
0
 

Author Comment

by:Johne75
ID: 35062210
Also, at the CNC i was trying to ping again. (Actually 2 CNC machines doing the same thing) at first no response try pinging again and I get a response. It seems intermittent.
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35062307
Sounds like DHCP and or DNS are having issues.
You can try restarting those services on the server.

Are bot PCs going through the same switch? You have have network hardware issues.
0
 

Author Comment

by:Johne75
ID: 35062631
Both CNC moved to different switch (just for troubleshooting sake) Cisco switch lights blinking away. Restarted DNS and DHCP services. Still no luck. I noticed when I boot CNC there is a message that says cannot find LMHOSTS in the DOS boot screen right after it tries to initialize tcp/ip DHCP
0
 
LVL 13

Expert Comment

by:AustinComputerLabs
ID: 35062675
Were you ever able to get the DHCP address to renew?

Can you try a static IP?
0
 

Accepted Solution

by:
Johne75 earned 0 total points
ID: 35062906
If all else fails... Reboot. Works fine now. not sure what the heck was the root cause on that one.
0
 

Author Closing Comment

by:Johne75
ID: 35321709
Rebooting corrected the problem. Not sure what was broke all troubleshooting showed everything was working as it should.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

WARNING:   If you follow the instructions here, you will wipe out your VTP and VLAN configurations.  Make sure you have backed up your switch!!! I recently had some issues with a few low-end Cisco routers (RV325) and I opened a case with Cisco TA…
Unable to change the program that handles the scan event from a network attached Canon/Brother printer/scanner. This means you'll always have to choose which program handles this action, e.g. ControlCenter4 (in the case of a Brother).
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

862 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question