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Troubleshooting Ipconfig
An error occurred while
renewing interface
Can ping ip but not name
Can
ping IP but not hostname after installed/upgraded software
Can receive IP packets but
not send them
Can't
obtain/renew IP addresses from the DHCP server
Can't ping my own IP address
Cannot use the 2nd NIC
IP address conflicts
No IP while the
network cable is disconnected
No operation can be
performed on the adapter
One-way ping only
Some Win9x obtain different subnet mask
The DHCP client has obtained an IP address that is already in use on the
network
Unexpected network failure or insufficient access or access is denied
Why the ipconfig shows 0.0.0.0 ip even you have assigned a static ip
Why do I get 169.254.x.x IP?
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An error occurred while
renewing interface
Symptoms: When trying to
release and renew the IP address using the Ipconfig command, you may receive
the following error message: “An error occurred while renewing interface
'Internet': An operation was attempted on something that is not a socket.”
Cause: These issues may
occur if the Winsock registry keys are damaged or corrupted.
Can ping ip but
not name
I have a situation here where I could ping an IP of a
computer but how come I couldn't ping with its computer name?
1. Incorrect WINS and DNS settings.
2. Incorrect TCP/IP settings
3. Check lmhosts and hosts files
Can
ping IP but not hostname after installed/upgraded software
Cause: the may modify the networking
configuration in registry.
Can receive IP packets but
not send them
Symptoms: When using
ipconfig command, you may have no IP address or no Automatic Private IP
Addressing (APIPA) address. You may be receiving IP packets but not sending
them.
Cause: These issues may
occur if the Winsock registry keys are damaged or corrupted.
Can't ping
my own IP address
Failure to ping a computer's own IP address is most likely caused by a
firewall program or improperly configured.
Can't
obtain/renew IP addresses from the DHCP server
Symptoms: 1) you have a DHCP client which may
not be able to obtain/renew IP addresses from the DHCP server intermittently.
2) after setup a workstation to obtain an IP address from DHCP, the machine
can't ping others and ipconfig /all shows Autoconfiguration IP Address. . . :
169.254.x.x.
Resolutions: 1)
If this
is XP, obtain the latest service pack for Windows XP.
2) Use the Network Diagnostics tool to identify any failed settings. To do
this, go to Help and Support> Use
Tools to view your computer information and diagnose problems> Network
Diagnostics> Scan your system. When
the process finishes, check for any items marked "FAILED" in red, expand
those categories, and view the additional details about what the testing
showed.
3) Assign a static ip on the client and ping the DHCP server. If you can't
ping the DHCP server, check the connection and hardware.
4) If you can ping the DHCP after assigning static ip, check the DHCP
settings.
5) Make sure no firewall is running on your LAN.
6) Run Repair this connection if it is XP. Or use netsh to reset TCP/IP
configuration.
7) If it is win98/w2k, remove and reinstall TCP/IP.
8) Try to upgrade the new NIC driver.
9) Make sure you don't run out of IPs in the DHCP scope.
10) If you use a router as DHCP, you may want to upgrade the firmware.
Cannot use the 2nd NIC
Symptom: You have two computers and each one
has two NICs. You are using the first NIC with 192.168.1.0/24 to connect the
Internet and it works. You also want to use the 2nd NIC with crossover cable
to connect to each other using the same IP range (one is 192.168.1.10 and
another is 192.168.1.11). You can't ping each other (192.168.1.10 and
192.168.1.11).
Resolution: The 2nd NICs should use the
different IP range.
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SYMPTOMS: when trying to set the IP address on a
NIC, you may receive the following error message: "The IP address
XXX.XXX.XXX.XXX you have entered for this network adapter is already
assigned to another adapter Name of adapter. Name of adapter
is hidden from the network and Dial-up Connections folder because it is not
physically in the computer or is a legacy adapter that is not working. If the
same address is assigned to both adapters and they become active, only one of
them will use this address. This may result in incorrect system
configuration. Do you want to enter a different IP address for this adapter
in the list of IP addresses in the advanced dialog box? "
RESOLUTION:
1. If you click Yes, you see the TCP/IP properties where you
can change the IP address. Then assign the different IP.
2. If you click No, the IP address is assigned to the
network adapter. To resolve this problem, uninstall the ghosted network
adapter from the registry: At command prompt, type
set devmgr_show_nonpresent_devices=1,
and then press ENTER. Type Start
DEVMGMT.MSC, and
then press ENTER. Click View, and then click Show
Hidden Devices. Expand the Network Adapters tree and right-click the
dimmed network adapter, and then click Uninstall.
No IP while the
network cable is disconnected
Symptoms: your computer has a static IP. However, the ipconfig shows no IP
(Media State - Cable Disconnected) while the network cable is disconnected.
Cause: this is by design. If you have some software using TCP/IP whiteout
connecting to a network, you may setup it manually.
No operation can be
performed on the adapter
Symptoms: when attempting to use ipconfig
/release or renew command, you get "No operation can be performed on the
adapter <xxxxx...> as this connection has its media/cable disconnected.
Causes: 1. The network is up-plugged or no
NIC. 2. You are using static IP.
One-way ping only
If you can ping other computers and other computers can't ping your
computer, this is often caused by an improperly configured firewall
on you computer. For example, ICF should not be enabled on LAN NIC.
Some Win9x obtain different
subnet mask
Symptoms: In your domain network, some computers (most are win9x) obtain
mask 255.255.255.0 instead of 255.0.0.0 randomly and they can't logon to the
Domain. IPCONFIG /renew doesn't fix the problem. If you assign static ip and
correct mask, the computer will be able to logon without any problem. If you
check the WINS, you may find many bad records.
Possible reasons: you may have another network device (possible a router)
except main DHCP functions as a DHCP.
The DHCP client has obtained an IP address that is already in use on the
network
Symptom: When trying to renew IP, you may get
this error "An error occurred while renewing the interface Local Area
Connection: The
DHCP client has obtained an IP address that is already in use on the network.
The local interface will be disabled until the DHCP client can obtain a new
address."
Resolution: 1. Release and the renew it.
2. Clean the internal DNS and WINS records.
Refer to case 083104LR
Unexpected network failure or insufficient access or access is denied
Symptoms: when trying to use ipconfig
/release or renew, you may receive the following message "The following error
occurred when releasing adapter Local Area Connection: Unexpected network
failure or insufficient access or access is denied"
Cause: You don't have permission to release
or renew the IP.
Why do I
get 169.254.x.x IP?
Symptom: The Internet Assigned Numbers
Authority (IANA) has reserved 169.254.0.0-169.254.255.255 for Automatic
Private IP Addressing. If the computer can't get ip from DHCP, APIPA provides
an address that is guaranteed not to conflict with routable addresses.
Resolutions: 1) Make sure you have good
connection.
2) Check the hardware and settings.
3) Make sure the DHCP is working.
4) For the test, you can assign static ip. If static ip works, it is possible
DHCP issue. If static ip doesn't work, check the hardware or connection.
5) WinSock2 stack may be corrupted and need to repair.
Why the ipconfig shows 0.0.0.0 ip even you have assigned a static ip
Question: I have
assigned a static ip, subnet to the computer, but the ipconfig shows IP
address is 0.0.0.0 and subnet mask 0.0.0.0.. Why?
Answer: An
existing IP address on the network has the same IP address. You may use
tracert ip, WINS and DNS records to find out another computer using the same
IP.
If your laptop users frequently disconnect
from one network segment and reconnect to another network segment, they may
not be able to access the second network. Resolution will be run ipconfig
/registerdns.
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