ipconfig renew

  • Thread starter Thread starter Michael Chang
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Michael Chang

some of the client in the office keep loosing the
connection to the network. I have to type ipconfig /renew
in order to get them back on. Why? and How to fix it?
 
In
Michael Chang said:
some of the client in the office keep loosing the
connection to the network. I have to type ipconfig /renew
in order to get them back on. Why? and How to fix it?
Click to expand...

You need to clarify, when you say network, are you talking local network?
Is this an AD Domain?
Are the clients only using the local DNS server if this is an AD Domain?
 
It is an AD domain and the client keep loosing connection
to the LAN, i.e. every so often the client will loose
connection to the network printer or to the exchange
server. After we type ipconfig /renew everything is back
to normal.

We use both internal DNS and external DNS. Internal just
for the computers within the office.

I hope this will help.
-----Original Message-----
 
In (e-mail address removed) <[email protected]>
posted a question
Then Kevin replied below:
It is an AD domain and the client keep loosing connection
to the LAN, i.e. every so often the client will loose
connection to the network printer or to the exchange
server. After we type ipconfig /renew everything is back
to normal.

We use both internal DNS and external DNS. Internal just
for the computers within the office.
Click to expand...

It sounds to me like your clients have an ISP's DNS listed in TCP/IP
properties. You must use only your internal DNS server in all machines part
of your domain. Only your DNS server can answer for your internal Network
and when the clients are using the ISP's DNS in any position this will
happen.
When you run ipconfig /renew it resets the order of your DNS servers and
puts your internal DNS back at the top. Even if you only have one DNS server
locally, that is the only one you can use.
 
In
It is an AD domain and the client keep loosing connection
to the LAN, i.e. every so often the client will loose
connection to the network printer or to the exchange
server. After we type ipconfig /renew everything is back
to normal.

We use both internal DNS and external DNS. Internal just
for the computers within the office.

I hope this will help.
Click to expand...

If you're saying that on your client computers that they ONLY have the
internal DNS server listed when they get an IP from DHCP, then I don't see
why you have to renew it. Renewing it is telling me that in your DHCP
options you have listed the internal DNS AND the ISP's and due to the fact
the way the DNS Client resolver works. It hits the first DNS, say the
internal one, so logons will intially work. But when they go to a website,
the first internal one may not be able to resolve it, so the client machine
REMOVES that from the eligible resolvers list, then uses the second one and
it DOES NOT go back to the first entry unless you restart the machine,
restart the DNS client service or refresh, which is what you;'re doing. So
you see what's going on here?

Check your DHCP Scope Option 015 to ONLY list the internal DNS. If the
external (ISP) is in there, remove it.
Notice: if you're using your Router's DHCP, disable it and use Windows DHCP.
You'll be way better off.

If your DC shows the ISP's DNS too, that needs to removed too.

See AD requires it's own internal DNS for functionality. Involving externals
will cause NUMEROUS errors, too many to mention, one of them being what
you;'re experiencing.

In your DNS Properties, under forwarding tab, check off forwarding and type
in your ISP's DNS in there. If the option is grayed out, delete your Root
zone. IF not sure how to perform these steps, see this article, it shows how
to do both of these tasks:
http://support.microsoft.com/?id=300202

Hope that helps.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
Thank you very much. I just removed the external DNS from
the DHCP. So far no complaints.

By the way here is another question:

the computers in the office could not access other
computers by using the Network Place, but when we type in
the host name (\\computer_name)manually it works. Why?
-----Original Message-----
In (e-mail address removed)
Click to expand...
 
After I remove the external DNS from the DHCP, now it
takes a little longer than before for opening the web page
that is visited for the first time. Is there any way to
solve it?
 
In (e-mail address removed) <[email protected]>
posted a question
Then Kevin replied below:
Thank you very much. I just removed the external DNS from
the DHCP. So far no complaints.

By the way here is another question:

the computers in the office could not access other
computers by using the Network Place, but when we type in
the host name (\\computer_name)manually it works. Why?
Click to expand...

Network Places uses NetBIOS, using \\computername will use DNS with the DNS
suffix.
 
In
After I remove the external DNS from the DHCP, now it
takes a little longer than before for opening the web page
that is visited for the first time. Is there any way to
solve it?
Click to expand...

What forwarder are you using? Try 4.2.2.2.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
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