flteng562
asked on
One workstation on sbs 2011 std. domain cannot get IP address from server
Hi all,
Here is the network setup:
SBS 2011 Std. handling DHCP,DNS for 8 win XP PC's / Router has DHCP disabled / Server connected to a unmanaged Netgear Prosafe 24 port switch / In one office I have an additional Netgear Prosafe 5 port to provide for a networked Laser Printer and two PC's
The problem is one of the PC's in the Office with the 5 port switch cannot get an IP address from the server when connected to the switch. I also swapped out switches and the problem remains
If I bypass the switch and connect directly to the PC it optains the Server addressing information and can access server Shares / Internet / Exchange.
With the cable connected to any port on the 5 port switch the Data light is flashing very fast.
Anyone have any experience with this?
Thanks Frank
Here is the network setup:
SBS 2011 Std. handling DHCP,DNS for 8 win XP PC's / Router has DHCP disabled / Server connected to a unmanaged Netgear Prosafe 24 port switch / In one office I have an additional Netgear Prosafe 5 port to provide for a networked Laser Printer and two PC's
The problem is one of the PC's in the Office with the 5 port switch cannot get an IP address from the server when connected to the switch. I also swapped out switches and the problem remains
If I bypass the switch and connect directly to the PC it optains the Server addressing information and can access server Shares / Internet / Exchange.
With the cable connected to any port on the 5 port switch the Data light is flashing very fast.
Anyone have any experience with this?
Thanks Frank
WORKS2011
replace the switch what happens? move the switch to another device and see what happens.
ASKER
Hi works2011,
I originally had a new Linksys 5 port switch installed. That is when the PC lost connectivity. I then purchased a Netgear Prosafe 5 port with the same result. I returned that one thinking it was bad. Installed another Netgear 5 port switch same problem.
If I bypass the switch altogether and connect the cable directly to the PC it works
I originally had a new Linksys 5 port switch installed. That is when the PC lost connectivity. I then purchased a Netgear Prosafe 5 port with the same result. I returned that one thinking it was bad. Installed another Netgear 5 port switch same problem.
If I bypass the switch altogether and connect the cable directly to the PC it works
is it set to auto negotiate with the switch, I suspect the NIC on the workstation.
What happens if you do ipconfig /flushdns on the workstation?
may uninstall the NIC drivers and reinstall or update, I would start here.
what happens if you place a laptop behind the switch?
What happens if you do ipconfig /flushdns on the workstation?
may uninstall the NIC drivers and reinstall or update, I would start here.
what happens if you place a laptop behind the switch?
ASKER
Hi Works,
I actually installed a PCI NIC and tried it behind the switch with the same result - No connectivity.
I then removed the PCI nic and uninstalled and updated the integrated nic with the latest drivers . Same result - No connectivity
Right now i am on the problem PC with the switch bypassed. I did try a laptop but it lasted about 10 minutes then lost connectivity.
I actually installed a PCI NIC and tried it behind the switch with the same result - No connectivity.
I then removed the PCI nic and uninstalled and updated the integrated nic with the latest drivers . Same result - No connectivity
Right now i am on the problem PC with the switch bypassed. I did try a laptop but it lasted about 10 minutes then lost connectivity.
if you give the workstation a static IP, does it connect and talk on the network happily?
What is the other computer on this switch doing? Does it use DHCP and is it working fine?
Have you run rouge checker http://blogs.technet.com/b/teamdhcp/archive/2009/07/03/rogue-dhcp-server-detection.aspx
to ensure there is not a secondary DHCP causing some issue?
cheers
Andrew
What is the other computer on this switch doing? Does it use DHCP and is it working fine?
Have you run rouge checker http://blogs.technet.com/b/teamdhcp/archive/2009/07/03/rogue-dhcp-server-detection.aspx
to ensure there is not a secondary DHCP causing some issue?
cheers
Andrew
ASKER
Hi Andrew,
I gave the workstation a static IP and still could not connect from behind the switch.
The other PC is wireless and is working fine. I have removed the switch entirely for now to give the client time to access his e-mail. i plan on putting it back when i get onsite in the morning 8:00 AM EST
I will run the rouge check in the morning and post back.
Regards,
Frank
I gave the workstation a static IP and still could not connect from behind the switch.
The other PC is wireless and is working fine. I have removed the switch entirely for now to give the client time to access his e-mail. i plan on putting it back when i get onsite in the morning 8:00 AM EST
I will run the rouge check in the morning and post back.
Regards,
Frank
so there is really only 1 PC and 1 Printer behind this switch.
Does the printer work fine?
Cheers
Does the printer work fine?
Cheers
have you tried inspecting/testing the connection from the 24 port to the 5 port.
try different port on the 24 port to feed the 5 port.
Try known good cable between 24port and 5port.
Cheers
Andrew
try different port on the 24 port to feed the 5 port.
Try known good cable between 24port and 5port.
Cheers
Andrew
ASKER
Hi Andrew,
With the cable coming from the wall outlet (Connected to the 24 port switch) connected to the PC directly it works fine.
I have already swapped ports on the 24 port switch and tried a different cable
When I had the printer connected to the 5 port switch along with the other two PC's neither one could print.
Regards,
Frank
With the cable coming from the wall outlet (Connected to the 24 port switch) connected to the PC directly it works fine.
I have already swapped ports on the 24 port switch and tried a different cable
When I had the printer connected to the 5 port switch along with the other two PC's neither one could print.
Regards,
Frank
ASKER
Hi,
No rogue DHCP server in the network.
Just for the heck of it I went ahead and connected both PC's and the printer back up to the 2nd replacement 5 port switch then connected the switch back into the network. Same problem - No Valid IP for either PC after rebooting them. Bypassed the switch and the desktop came back up and the laptop came back up (Wirelessly Connected).
Regards,
Frank
No rogue DHCP server in the network.
Just for the heck of it I went ahead and connected both PC's and the printer back up to the 2nd replacement 5 port switch then connected the switch back into the network. Same problem - No Valid IP for either PC after rebooting them. Bypassed the switch and the desktop came back up and the laptop came back up (Wirelessly Connected).
Regards,
Frank
What model is the 5 Port?
Netgear do a 5 port http://www.netgear.com.au/business/products/switches/prosafe-plus-switches/gs105e.aspx that can be configured, that would stop it from working.
Also while you are at it. What is the model of the 24 port?
considered logging a call with Netgear?
From what you have said, even setting a static IP they still dont work, so it isnt really a DHCP problem, but a general connectivity issue.
cheers
Andrew
Netgear do a 5 port http://www.netgear.com.au/business/products/switches/prosafe-plus-switches/gs105e.aspx that can be configured, that would stop it from working.
Also while you are at it. What is the model of the 24 port?
considered logging a call with Netgear?
From what you have said, even setting a static IP they still dont work, so it isnt really a DHCP problem, but a general connectivity issue.
cheers
Andrew
ASKER
Hi Andrew,
Both the 24 port (JFS524v2 ) and 5 port (GS105) are Netgear Prosafe unmanaged switches.
Regards,
Frank
Both the 24 port (JFS524v2 ) and 5 port (GS105) are Netgear Prosafe unmanaged switches.
Regards,
Frank
Hi Frank,
These should not have any issue that i am aware of.
Have you tried using a crossover cable between the switches? It shouldn't need it as it should auto x over detect.
Also the 5 port should be using port 5 to link to the 24 port.
But all these considered there appears no reason that this shouldnt work.
At this point i think you have two options.
1. Log a support call with Netgear.
2. Replace the 24Port switch. My feeling is that the 24 port is the most likely culprit. You have already changed out the 5port, you have tested ALL cables. This really only leaves the 24 port as not playing nicely with the other switch.
Cheers
Andrew
These should not have any issue that i am aware of.
Have you tried using a crossover cable between the switches? It shouldn't need it as it should auto x over detect.
Also the 5 port should be using port 5 to link to the 24 port.
But all these considered there appears no reason that this shouldnt work.
At this point i think you have two options.
1. Log a support call with Netgear.
2. Replace the 24Port switch. My feeling is that the 24 port is the most likely culprit. You have already changed out the 5port, you have tested ALL cables. This really only leaves the 24 port as not playing nicely with the other switch.
Cheers
Andrew
ASKER
Hi Andrew,
I agree the next step would be to change out the 24 port switch. The strange thing is I have swapped to different ports on the switch to see if it was a port problem but the problem still remains.
Regards,
Frank
I agree the next step would be to change out the 24 port switch. The strange thing is I have swapped to different ports on the switch to see if it was a port problem but the problem still remains.
Regards,
Frank
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Hi Andrew,
I agree with your assesment the 24 port switch is the problem child. I think i will just replace it later today and post back with the results.
Regards,
Frank
I agree with your assesment the 24 port switch is the problem child. I think i will just replace it later today and post back with the results.
Regards,
Frank
Hope it goes well ;)
ASKER
Hi Andrew,
I replaced the 24 port switch and it is now working with the 5 port switch uplinked to it. Very strange since nothing else showed up as far as lost connections on the other workstations.
Appreciate your help with this.
Regards,
Frank
I replaced the 24 port switch and it is now working with the 5 port switch uplinked to it. Very strange since nothing else showed up as far as lost connections on the other workstations.
Appreciate your help with this.
Regards,
Frank
Yeah i have seen some strange things when switches fail.
Good to hear it is resolved.
Good to hear it is resolved.