Limit on IP Addresses Assigned to a NIC?

S

SE Schutte

We are running Windows 2000 Server. This is a
pretty new machine - over 2GB of memory, and a 3.06 GHz
Xeon processor.

We're running into a very strange problem with IP
addresses. Currently we have 24 extra IP addresses
assigned to our NIC and everything works fine. If we
assign a 25th address to the NIC, when we then go to open
IIS we get the following error:
"Error connecting to [our machine name].
Not enough resources are available to complete this
operation. Do you wish to continue to attempt to connect
to it in the future?" When I click "Yes" IIS opens, but
it doesn't display any of our web sites - there's a line
at the top saying "Internet Information Services" with
nothing, not even our default web site, below it.

Also, if we go into the Event Log and try to pull up the
properties of an event, nothing happens. However, when we
try to close the Event Log we get a message telling us to
close all the property windows first. The same thing
happens when we try to look at the properties of a service
in our list of services.

If we delete the 25th IP address from the NIC card,
everything works as it should with no errors.

After we add the 25th IP address to the NIC the websites
associated with the IP addresses all still work, and we
can even ping that 25th address and get a response. The
task manager shows CPU usage at about 2%, and memory usage
at about 322500, so there's plenty of CPU and memory
available.

Thanks in advance for any information anyone can give me
on how to resolve this issue!

SE Schutte
 
S

SE Schutte

-----Original Message-----
We are running Windows 2000 Server. This is a
pretty new machine - over 2GB of memory, and a 3.06 GHz
Xeon processor.

We're running into a very strange problem with IP
addresses. Currently we have 24 extra IP addresses
assigned to our NIC and everything works fine. If we
assign a 25th address to the NIC, when we then go to open
IIS we get the following error:
"Error connecting to [our machine name].
Not enough resources are available to complete this
operation. Do you wish to continue to attempt to connect
to it in the future?" When I click "Yes" IIS opens, but
it doesn't display any of our web sites - there's a line
at the top saying "Internet Information Services" with
nothing, not even our default web site, below it.

Also, if we go into the Event Log and try to pull up the
properties of an event, nothing happens. However, when we
try to close the Event Log we get a message telling us to
close all the property windows first. The same thing
happens when we try to look at the properties of a service
in our list of services.

If we delete the 25th IP address from the NIC card,
everything works as it should with no errors.

After we add the 25th IP address to the NIC the websites
associated with the IP addresses all still work, and we
can even ping that 25th address and get a response. The
task manager shows CPU usage at about 2%, and memory usage
at about 322500, so there's plenty of CPU and memory
available.

Thanks in advance for any information anyone can give me
on how to resolve this issue!

SE Schutte


.
I'm responding to my own post because I found a work-
around for this issue. It appears that 25 is the magic
number - when we add a 26th IP address to the NIC card
everything starts working again.

We've assigned an extra unused IP address to the card to
bring our total over 25 and so far everything seems to be
working fine.

SE Schutte
 

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