unable to renew the IP address from DHCP; unable to flush ARP cache

Posted: 11-09-2003, 12:30 PM

Andrei Gheorghe

Guest
Posts: n/a

I have windows server 2003 enterprise with 2 NICs. One to
local network with 192.168.0.0-255 and the other to the
ISP's cable modem with IP, GW and DNS obtained
automatically.
Routing & remote started with NAT and firewall on the NIC
to ISP.
I don't know way but 1 week agoe (previous stable for 4
months) the ISP started to change the IP almost at every 2
h. Maybe because of my big traffic or maybe they have a
new IP policy. I really don't know.
At every 2 hours the communication stops and connection to
the internet is frozen. Even from the console the internet
connection doesn't work.
If I disable/enable tyhe NIC to ISP or click on repair I
receive the following 2 messages:
unable to renew the IP address from DHCP server
unable to flush ARP cache
then the connection is reestablished in couple of seconds
and the new IP is retrieved and installed. Everything runs
fine for the next 2 hours.
The system is not doing it automatically and it needs my
intervention.
Can you help?
Any idea would be appreciated.
Thank you.

Andrei

Responses to "unable to renew the IP address from DHCP; unable to flush ARP cache"

Ken Wickes [MSFT]

Guest
Posts: n/a

Re: unable to renew the IP address from DHCP; unable to flush ARP cache

Posted: 11-10-2003, 08:44 PM

Sounds like you should have a conversation with your ISP.

Don't worry about the ARP cache.

--

Ken Wickes [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

"Andrei Gheorghe" <anonymous@discussions.microsoft.com> wrote in message
news:057401c3a6c5$9ccca010$a101280a@phx.gbl...

>I have windows server 2003 enterprise with 2 NICs. One to
> local network with 192.168.0.0-255 and the other to the
> ISP's cable modem with IP, GW and DNS obtained
> automatically.
> Routing & remote started with NAT and firewall on the NIC
> to ISP.
> I don't know way but 1 week agoe (previous stable for 4
> months) the ISP started to change the IP almost at every 2
> h. Maybe because of my big traffic or maybe they have a
> new IP policy. I really don't know.
> At every 2 hours the communication stops and connection to
> the internet is frozen. Even from the console the internet
> connection doesn't work.
> If I disable/enable tyhe NIC to ISP or click on repair I
> receive the following 2 messages:
> unable to renew the IP address from DHCP server
> unable to flush ARP cache
> then the connection is reestablished in couple of seconds
> and the new IP is retrieved and installed. Everything runs
> fine for the next 2 hours.
> The system is not doing it automatically and it needs my
> intervention.
> Can you help?
> Any idea would be appreciated.
> Thank you.
>
> Andrei
>

Andrei Gheorghe

Guest
Posts: n/a

Re: unable to renew the IP address from DHCP; unable to flush ARP cache

Posted: 11-12-2003, 12:00 AM

This is what I'm doing right now.
Thks anyway.

>-----Original Message-----
>Sounds like you should have a conversation with your ISP.
>
>Don't worry about the ARP cache.
>
>--
>
>Ken Wickes [MSFT]
>This posting is provided "AS IS" with no warranties, and

confers no rights.

>
>
>"Andrei Gheorghe" <anonymous@discussions.microsoft.com>

wrote in message

>news:057401c3a6c5$9ccca010$a101280a@phx.gbl...
>>I have windows server 2003 enterprise with 2 NICs. One to
>> local network with 192.168.0.0-255 and the other to the
>> ISP's cable modem with IP, GW and DNS obtained
>> automatically.
>> Routing & remote started with NAT and firewall on the

NIC

>> to ISP.
>> I don't know way but 1 week agoe (previous stable for 4
>> months) the ISP started to change the IP almost at

every 2

>> h. Maybe because of my big traffic or maybe they have a
>> new IP policy. I really don't know.
>> At every 2 hours the communication stops and connection

>> the internet is frozen. Even from the console the

internet

>> connection doesn't work.
>> If I disable/enable tyhe NIC to ISP or click on repair I
>> receive the following 2 messages:
>> unable to renew the IP address from DHCP server
>> unable to flush ARP cache
>> then the connection is reestablished in couple of

seconds

>> and the new IP is retrieved and installed. Everything

runs

>> fine for the next 2 hours.
>> The system is not doing it automatically and it needs my
>> intervention.
>> Can you help?
>> Any idea would be appreciated.
>> Thank you.
>>
>> Andrei
>>
>
>
>.
>

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