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DHCP And Dual NIC

 
 
Lee
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      01-10-2008, 01:14 AM
I have an SBS server with 2 NIC cards each on a different subnet. The DHCP
server hands out network addresses on one card (scope) but not the other. How
can I fix this? Not both scopes are defined and active. There are no error
messages in the event browser, perhaps there is another log some where?
 
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Phillip Windell
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      01-10-2008, 08:16 PM
Where's the LAN Router between the two segments? SBS is not meant to be a
"lan router"

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Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------


"Lee" <(E-Mail Removed)> wrote in message
news:63BB291F-F1E4-4BB5-99A5-(E-Mail Removed)...
>I have an SBS server with 2 NIC cards each on a different subnet. The DHCP
> server hands out network addresses on one card (scope) but not the other.
> How
> can I fix this? Not both scopes are defined and active. There are no error
> messages in the event browser, perhaps there is another log some where?



 
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Lee
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      01-10-2008, 09:59 PM
I don't believe it should matter where the LAN router is... the point is that
the DHCP server has the two NIC cards in it and should provide addresses to
each segment. However, the segment that is not getting the addresses, it is
providing the routing.
 
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Phillip Windell
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      01-11-2008, 03:28 PM
"Lee" <(E-Mail Removed)> wrote in message
news:F3B67EDF-3BE3-4456-8C62-(E-Mail Removed)...
>I don't believe it should matter where the LAN router is.


Yes it matters

> .. the point is that
> the DHCP server has the two NIC cards in it and should provide addresses
> to
> each segment.


No it doesn't. I run 3 "live" subnets and am setup for 8 if I need them.
My DHCP has one Nic.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------


 
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Lee
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      01-11-2008, 09:06 PM
Fine...
The computer is an SBS computer with 2 NIC cards DHCP, EMail, RRAS.
One subnet 192.168.3.0/24 (which works for DHCP) has a gateway of
192.168.3.7 to the internet.

The other Subnet, NIC card 2, has an address of 192.168.5.0/24 any device
connected to this subnet does not receive an address. i.e. the problem.
Devices that have been manually configured for this subnet use the SBS NIC
card as its gateway and they can successfully browse the internet and ping
the other subnet and visa versa. Therefore addresses one each of the 2
subnets are successfully routed between the 2 subnets and the internet. This
second subnet simply will not receive a DHCP address.

Hope this helps
 
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Phillip Windell
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      01-11-2008, 09:26 PM
Ok, so the SBS box is acting as the LAN Router by using RRAS.

There are two things I can think of to check. One is fairly obvious but
doesn't hurt to double check, the other may not be so obvious.

1. Make sure the Scope is built with the correct IP "specs" and Scope
Options according to the Nic and subnet is serves. The mask is a common
thing to be in error.

2. Check the DHCP Bindings. Open the DHCP MMC,..right-click on the Server
Name and choose Properties. Then choose the Advanced Tab and click on the
Bindings Button. Both nics should be listed and both of them need to be
enabled.

Those are the only things I can think of at this point.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------


"Lee" <(E-Mail Removed)> wrote in message
news:7B6FF0F1-9D6F-43BB-A405-(E-Mail Removed)...
> Fine...
> The computer is an SBS computer with 2 NIC cards DHCP, EMail, RRAS.
> One subnet 192.168.3.0/24 (which works for DHCP) has a gateway of
> 192.168.3.7 to the internet.
>
> The other Subnet, NIC card 2, has an address of 192.168.5.0/24 any device
> connected to this subnet does not receive an address. i.e. the problem.
> Devices that have been manually configured for this subnet use the SBS NIC
> card as its gateway and they can successfully browse the internet and ping
> the other subnet and visa versa. Therefore addresses one each of the 2
> subnets are successfully routed between the 2 subnets and the internet.
> This
> second subnet simply will not receive a DHCP address.
>
> Hope this helps



 
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Phillip Windell
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      01-11-2008, 09:31 PM
....just thought of a third thing to look at...

3. Make sure the scope is "activated". Rightclick on the Scope and choose
"activate" from the popup menu.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------


 
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Lee
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      01-11-2008, 10:16 PM
Ah, HAAA. I knew there had to be a bindings section somewhere, and, the
second NIC was not checked. So I will check back once I have had a chance to
retest.
 
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