ARP Problem?

I have a server setup that has 3 nics. 2 are external, one is
internal. The two external have 2 different ip addresses 72.x.x.109
and 72.x.x.110, but the same subnet and gateway. The third uses a
private ip. The server is setup as a gateway computer. I am running
IIS and hosting 2 websites on one of the interfaces, as well as email.
The second interface hosts webmail for Kerio.

I am having an intermittent problem with the first external card. It
looses connection to the internet, without warning. No one can see in,
it can't see out. If I disable and re-enable the card, the problem
clears. I noticed that when I run a repair on the card, it throws up a
warning that it can't clear the arp cache, so I ran arp -a and noticed
that there was no entry for the 72.x.x.109 network card. the 72.x.x.
110 card is there, with its g/w specified, as well as the 192.x.x.x
card. When I disable and re-enable the 72.x.x.109 card, it shows back
up in arp -a with its g/w and all works fine for a couple days... I'm
at a loss, here. I have tried switching out the card, deleting it and
re-installing, but none of these solutions worked.

Any ideas would be greatly appreciated

Thanks

"talkinggoat" <(E-Mail Removed)> wrote in message
news:7621e4d2-824b-4f16-806e-(E-Mail Removed)...
>I have a server setup that has 3 nics. 2 are external, one is
> internal. The two external have 2 different ip addresses 72.x.x.109
> and 72.x.x.110, but the same subnet and gateway.

Same subnet = one Nic

1 subnet = 1 nic
2 subnets = 2 nics
3 subnets = 3 nics

1 subnet with multiple IP#s = 1 Nic with multiple IP#s.

175767 - Expected Behavior of Multiple Adapters on Same Network
http://support.microsoft.com/default...b;EN-US;175767

--
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.
-----------------------------------------------------

On Oct 2, 11:38*am, "Phillip Windell" <philwind...@hotmail.com> wrote:
> "talkinggoat" <johnmclaren...@yahoo.com> wrote in message
>
> news:7621e4d2-824b-4f16-806e-(E-Mail Removed)...
>
> >I have a server setup that has 3 nics. 2 are external, one is
> > internal. The two external have 2 different ip addresses 72.x.x.109
> > and 72.x.x.110, but the same subnet and gateway.
>
> Same subnet = one Nic
>
> 1 subnet = 1 nic
> 2 subnets = 2 nics
> 3 subnets = 3 nics
>
> 1 subnet with multiple IP#s = 1 Nic with multiple IP#s.
>
> 175767 - Expected Behavior of Multiple Adapters on Same Networkhttp://support.microsoft.com/default.aspx?scid=kb;EN-US;175767
>
> --
> Phillip Windellwww.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.
> -----------------------------------------------------

I think I see what you and the article are saying, I think, so I
assigned one NIC both external ip addresses.

Disabled the nic that has the ip address I transfered.

in network connections> right click the desired nic > properties>
select internet protocol tcp/ip> click properties> click advanced>
under ip address, click add> type in the other ip> click ok> click ok>
click ok> I restarted my cable modem and disabled, then re-enabled the
changed NIC.

Yes. Just set the "extra" nic to Automatic Addressing (DHCP), wait for it
to either get and address or "fail" (doesn't matter which),...then disable
it or uninstall the driver and remove the adapter,...this way it doesn't
leave the address that it was using "trapped" in the registry for that Nic.
If you don't do that and try to add that IP# to another Nic the OS may
complain that the address is already in use by another Nic even though it is
disabled.

--
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.
-----------------------------------------------------

"talkinggoat" <(E-Mail Removed)> wrote in message
news:28a3e7c1-3bf2-46ef-bb27-(E-Mail Removed)...
I think I see what you and the article are saying, I think, so I
assigned one NIC both external ip addresses.

Disabled the nic that has the ip address I transfered.

in network connections> right click the desired nic > properties>
select internet protocol tcp/ip> click properties> click advanced>
under ip address, click add> type in the other ip> click ok> click ok>
click ok> I restarted my cable modem and disabled, then re-enabled the
changed NIC.