1

Why would ipconfig /release then /renew "fix" an apparent DNS client issue

view story
linux-howto

http://serverfault.com – I seem to be having DNS issues --- which I suspect may be client related. At seemly random intervals, name resolution of local FQDN names fails. There's a warning in the system log: Name resolution for the name xxxxxxxx.yyy.zzz timed out after none of the configured DNS servers responded. (name redacted) If I do ipconfig /release and then ipconfig /renew then all is fine, until the next random occurrence. This is a very small network, with a Windows 2008 (SP2) standard running Active Directory + DHCP + DNS. My workstation is Windows 7 (SP1) We're on the same physical network, with a net (HowTos)

grtyyu's picture
Submitted by grtyyu on 02/25/2013

Stories similar to Why would ipconfig /release then /renew "fix" an apparent DNS client issue

Before I go installing a Linux box with bind or similar, I'm making a final plea for help.

We have a small office with a Win2K3 Standard Server hosting our domain and providing the office nameserver. The workstations are all Windows XP or Windows 7, pretty standard stuff.

Even though I don't have administrative privileges, can I block internet connection on my Mac OS 10.8 machine, through terminal?

I want to do this because I am lazy to disconnect ethernet cable from my machine to check one of my apps in offline mode :-(

I have found that for windows we have: ipconfig / release and ipconfig / renew commands for the same task.

Do we have any alternatives for thos

IPS restart 2 years 24 weeks ago

To restart my connection (which occasionally, randomly fails) the instructions from my ISP are for Windows.They are (in Windows Command Prompt):-ipconfig /release then ipconfig /renewHow can I do this in Linux?

I have one machine on the network that can't be pinged (by name or IP) or accessed with WMI by other machines on the network. So far I have tried:

Disabled firewall and AV Put onto a workgroup then re-added to domain ipconfig /renew Reset TCP/IP Reset Winsock Set a static IP and tried with DHCP

Any idea what to try next?

DHCP messages in LAN 10 weeks 1 day ago

I run a Mac and release/renew my IP with:

sudo ipconfig set en0 DHCP

In wireshark I get the following with udp.port==67 as filter:

Why are the messages sent from my computer broadcasted, but the server send them directly to me. The litterature I have say everything is broadcasted. Why isn't that the case here?

DHCP configuration problem 1 year 36 weeks ago

EDIT:

We have following setup: User comes to building, he gets address from range for unknown clients (192.168.100.0/25) and can only get to our web site. We call it anonymous range. Let's say our user acquired address 192.168.100.16 and won§t get past the local network.

Then he must go and register his MAC address and is assigned new fixed IP from 192.168.40.0/22 address range.

I would like to know, if there is a way I could force the DHCP server to renew the IP address of a client machine instantly, without me going to the client machine? In fact, imagine, I don't have access to the client machine.

So, here is my scenario,

The client first gets a Random IP address say A from the DHCP server initially, when it is connected to the LAN.

DHCP client's IP release query 38 weeks 2 days ago

Hi All,

I have two doubts here in DHCP Solaris environment.. could anyone please clarify me?

1. If a new client comes up and it needs an IP to be assigned by a DHCP server, how can it communicate with the DHCP server in the first case without any IP? The SUN doc says something about "BOOTP" agent but could not understand it. Can anyone enlighten me here??

2.

Hi I had been using Windows at my work Network and I recently asked the IT support to change my OS to ubuntu. They have installed the OS but I am not able to connect to the wired internet. The output of ipconfig/all is:

ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : 01HW****** Primary Dns Suffix . . . . . . . : xxxx.xxx.com Node Type . . . . . . .