Not getting IP address

My father's old iMac G3 slot loading system, running 10.2.3 experienced a power company power outage and restoration of power yesterday. It was connected to a DSL modem and all was working ok. Afterwards the DSL modem didn't work so the telco is sending a replacement. In the mean time I took the iMac home with me and cabled it to a router/DSL setup used by my iMac 24" and my wife's Gateway. The iMac boots up and spends a longish time in the Network startup phase and when done does not have an IP address from the DHCP server in the router. Other computers connected to this router get an IP address immediately so it's something in the iMac.
I can ping localhost (127.1.0.0) ok but cannot ping the router (192.168.1.1).
Is there anyway to test the iMac ethernet NIC to see if the power problem effected it?
Would doing an OS 10.2 reinstall be of any help? Any suggestions?

I seem to recall that Mac OS 10.2 had a problem with getting the DNS numbers.
What you need to do it is manually fill your numbers. You can still use dhcp and fill in the dns numbers.
BDAqua suggests in a post.
You can use OpenDNS for looking up web addresses.
Put these numbers in Network>TCP/IP>DNS Servers for a try...
208.67.222.222
208.67.220.220
https://www.opendns.com/homenetwork/start/device/apple-osx-tiger
(Please note that you do not need to a joint open DNS to use it.)
http://discussions.apple.com/message.jspa?messageID=5908432#5908432
Hear is the the full story.
Seems like you are not getting the DNS address or addresses.
apple > system preferences > network
Double click on network connection you are using.
Pick the TCP/IP tab.
Verify that you have a DNS Server. If you do not, look on your windows machine and see what the net address is. You can also pick using DHCF and still enter you DNS server address.
You can use
harddrive > applications > utilities > network utility
to diagnose the situation.
You can ping google.com. Result:
Ping has started ...
PING google.com (64.233.167.99): 56 data bytes
64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=215.362 ms
64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=279.597 ms
64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=189.747 ms
64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=250.657 ms
64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=183.232 ms
64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=243.753 ms
64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=173.108 ms
64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=230.239 ms
64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=180.639 ms
64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=232.177 ms
--- google.com ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max/stddev = 173.108/217.851/279.597/33.615 ms
If that does work, try pinging 64.233.167.99 Result:
Ping has started ...
PING 64.233.167.99 (64.233.167.99): 56 data bytes
64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=189.655 ms
64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=213.471 ms
64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=257.873 ms
64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=172.745 ms
64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=226.723 ms
64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=171.883 ms
64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=260.308 ms
64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=172.963 ms
64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=198.840 ms
64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=181.215 ms
--- 64.233.167.99 ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max/stddev = 171.883/204.568/260.308/32.247 ms
If pinging 17.254.3.183 works but pinging apple.com doesn't. You have a bad DNS Server address.
BDAqua suggests in a post.
You can use OpenDNS for looking up web addresses.
Put these numbers in Network>TCP/IP>DNS Servers for a try...
208.67.222.222
208.67.220.220
https://www.opendns.com/homenetwork/start/device/apple-osx-tiger
(Please note that you do not need to a joint open DNS to use it.)
http://discussions.apple.com/message.jspa?messageID=5908432#5908432
Robert
=======================================================
I suggest that you try pinging Google.com.
Macintosh-HD -> Applications -> Utilities -> Terminal
mac $ ping -c4 google.com
PING google.com (64.233.187.99): 56 data bytes
64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=177.617 ms
64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=251.899 ms
64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=169.291 ms
64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=250.119 ms
--- google.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 169.291/212.232/251.899/38.894 ms
mac $ ping -c4 64.233.187.99
PING 64.233.187.99 (64.233.187.99): 56 data bytes
64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=176.723 ms
64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=247.889 ms
64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=176.890 ms
64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=244.623 ms
--- 64.233.187.99 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 176.723/211.531/247.889/34.744 ms
mac $
Analysis: If you cannot ping Goolge.com but you can ping 64.233.187.99, then you need to enter you dns address. For some reason Mac OS X sometimes doesn't set the dns. You can set it manually.
apple > system preferences > network
tcp/ip tab and enter address of dns servers
example 162.33.160.100
You will need to use a different number.
Robert
Robert

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^
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Message was edited by: Menno Hogenbirk
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DHCP: Some clients not getting IP address

Recently setup a new DHCP server on Mac OS X Server 10.5.8 running on an Xserve. We migrated from a Linux server.
The Xserve was originally just a file server. So the only services currently running are: AFP, DHCP, NFS, and SMB. No additional software is running.
The DHCP server ran just fine for the first couple weeks. But then we found some computers just stopped getting IP addresses from the DHCP server. Some were new computers introduced to the network. Some were laptops that had left and come back. However, the DHCP server is definitely still giving out IP addresses and renewing them for most new and existing computers. There have been five computers that have not gotten IP addresses so far, and that had been the case both on the wireless and on a wired connection. Two were PC's, one running Windows 7 and one running Windows XP with Lenovo's ThinkVantage software. The other three were different models of MacBook Pros.
For those five computers, we managed to get them working in two ways. One, we can select to use DHCP with a manual address. When we do that, it manages to pick up all the other information from the DHCP server like DNS and gateway. The second thing we can do is configure the DHCP server to supply a static IP address by providing it with the MAC address of these machines. When we do that, the computers receive the IP address from the DHCP server.
So I guess you could say the problem I'm experiencing is for a few computers the DHCP server seems to only be able to provide static addresses, but not dynamic ones with a lease time.
I have logging set to the highest for the DHCP server. Below is the first thing I noticed that keeps showing up. Sometimes it shows a different MAC address than the one below. None of the afflicted computers have that MAC address, though. I have not seen any other errors in the logs for the DHCP server.
Jan 24 12:09:47 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:47 fileserver bootpd[73839]: service time 0.000304 seconds
Jan 24 12:09:50 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:50 fileserver bootpd[73839]: service time 0.000280 seconds
Jan 24 12:09:54 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:54 fileserver bootpd[73839]: service time 0.000264 seconds
Jan 24 12:10:03 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:03 fileserver bootpd[73839]: service time 0.000265 seconds
Jan 24 12:10:11 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:11 fileserver bootpd[73839]: service time 0.000283 seconds
Jan 24 12:10:19 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:19 fileserver bootpd[73839]: service time 0.000291 seconds
Jan 24 12:10:28 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:28 fileserver bootpd[73839]: service time 0.000324 seconds

Recently setup a new DHCP server on Mac OS X Server 10.5.8 running on an Xserve. We migrated from a Linux server.
The Xserve was originally just a file server. So the only services currently running are: AFP, DHCP, NFS, and SMB. No additional software is running.
The DHCP server ran just fine for the first couple weeks. But then we found some computers just stopped getting IP addresses from the DHCP server. Some were new computers introduced to the network. Some were laptops that had left and come back. However, the DHCP server is definitely still giving out IP addresses and renewing them for most new and existing computers. There have been five computers that have not gotten IP addresses so far, and that had been the case both on the wireless and on a wired connection. Two were PC's, one running Windows 7 and one running Windows XP with Lenovo's ThinkVantage software. The other three were different models of MacBook Pros.
For those five computers, we managed to get them working in two ways. One, we can select to use DHCP with a manual address. When we do that, it manages to pick up all the other information from the DHCP server like DNS and gateway. The second thing we can do is configure the DHCP server to supply a static IP address by providing it with the MAC address of these machines. When we do that, the computers receive the IP address from the DHCP server.
So I guess you could say the problem I'm experiencing is for a few computers the DHCP server seems to only be able to provide static addresses, but not dynamic ones with a lease time.
I have logging set to the highest for the DHCP server. Below is the first thing I noticed that keeps showing up. Sometimes it shows a different MAC address than the one below. None of the afflicted computers have that MAC address, though. I have not seen any other errors in the logs for the DHCP server.
Jan 24 12:09:47 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:47 fileserver bootpd[73839]: service time 0.000304 seconds
Jan 24 12:09:50 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:50 fileserver bootpd[73839]: service time 0.000280 seconds
Jan 24 12:09:54 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:54 fileserver bootpd[73839]: service time 0.000264 seconds
Jan 24 12:10:03 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:03 fileserver bootpd[73839]: service time 0.000265 seconds
Jan 24 12:10:11 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:11 fileserver bootpd[73839]: service time 0.000283 seconds
Jan 24 12:10:19 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:19 fileserver bootpd[73839]: service time 0.000291 seconds
Jan 24 12:10:28 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:28 fileserver bootpd[73839]: service time 0.000324 seconds

Cisco Flex Connect and users can not get IP Address by WAN

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I have a wlc 5508 with license base to 50 aps, i use a deployment flex connect. I already registered all my access points, I use web authentication to authenticate users guest, and the service dhcp is in the central site.
My issue is the users in each remote site, can not get an ip address by dhcp from the central site, they can authenticate in the guest ssid, but any users can not get an ip.
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Regards
Ivan.

Thanks Osita
If I configure Central Authentication and I configure central switching I need to create a dynamic interafce for each remote site and each dynamic interface associated with a different VLAN ID, because I can not associate a single interface dynamic to the same VLAN ID, but in my case the client remote in each remote site have the same network segment with the same VLAN ID with the same SSID for guests. My goal is to configure web authentication with the local DHCP server at each remote site, will this work?.Each remote site have its own server dhcp.
If I configure authentication central authentication with central switching with web authenticacion as I set in my scenario?
My issues are the interfaces dynamics, because I have the same network to the customer guest with the same ID VLan in each remote site
Regards

Hyper-V - Legacy NIC not getting DHCP address at boot, but when OS loads the NIC gets a DHCP address

Hi, I have a strange issue with DHCP.
I have a lab environment on a single Hyper-v 2012 Server. AD, DNS & DHCP exist on a single virtual machine, I have a flat network 192.168.1.x, all VM's are on this network. I have authorised DHCP and Setup the scope.
A VM has a legacy adaptor, the legacy nic is configured in the boot order as the first device.
When I boot the machine I do not get a DHCP address, however when the OS boots the Legacy NIC then gets a DHCP address??
I need to use a legacy NIC as I need to PXE boot the VM, however I should get an IP address at boot time, which I don't get.
I have run Wireshark on the DHCP server, I can see the legacy NIC do a "DHCP Discover and the DHCP Server respond with a DHCP Offer" however all communication ends there. I have disable all firewalls and I see no reason for this not to work.
I have done tis before with no issues but I am unable to get this to work on this server!!!!!

Hi
According to your description , it is recommended to make sure or do :
        In your environment , there is no any other valid DHCP, BOOTP or proxy DHCP offers.
        Make sure if the DHCP server is overload.
        So suggest to test that creating a new “internal virtual switch” and change the settings of VM which provide DHCP service to connect to the new “virtual switch”.
        Then create a new VM use legacy NIC also connect to the new “internal virtual switch” and try to PXE Boot.
Hope this helps.
Best Regards
Elton ji
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Not getting DHCP address on HP 8000 Elite

I'm using the Feb 2010 CD. Windows 2003 DHCP server
Boot with the cd and no dhcp address.
If I type "dhcpcd eth0 -n" enough times I will eventually get an address, although the first time it's usually "err, eth0: Failed to lookup hostname via DNS: Name or service not known"
The same CD works OK with a HP dc7900, dc7800, etc. It looks like they all have the same Intel e1000e nic, but maybe no?

I'm starting to investigate issues that may be similar to yours and I had a
thought that I thought I'd share with you ;-)
In what may be a related situation one of our admins is having issues with
the dhcp client on an openSUSE 11.1 (and 11.2) during and after the install
on some Dell servers. Sometimes the dhcp client will not get an ip address.
After some poking he found that there are in fact two dhcp clients available
: dhcpcd (dhcp client daemon) and dhclient (package is called dhcp-client).
The default client in openSUSE - and presumably the Linux environment of
ZENworks Imaging - is dhcpcd v3.x. It seems that there are a number of
reports of this client being problematic. The maintainer of this client has
recently released v5.x which may resolve the issues with v3.x.
In our testing on openSUSE dhclient works much more reliably than dhcpcd,
where "more" is equal to 100%. None of this helps us of course, but it is
background info that leads up to my idea: is it possible to use the other
client, dhclient in the ZEN Linux environment? I don't know if this client
is even included in the ZEN Imaging Linux environment or not. If it isn't
then maybe it might be possible to modify the initrd/root/linux files to
include it. This would at least let you have another means of acquiring a
dhcp ip address. I'm sorry that I do not have the Linux skills to do more
than make a suggestion...
Cheers,
Ron
PS I have submitted an enhancement request via the openFATE website to have
the dhcp client daemon upgraded to v5.x. Maybe if you think it a good idea
you could login to the openFATE portal and vote it up!

Urgent help? for Standalone AP users are not getting ip addresses

Dear friends,
i have Cisco LAP1140 series access points and i wanted to use them as autonomous , so i converted their ios from light weight to autonomous to
c1140-k9w7-tar.124-25d.JA image.
my network senario is
CORE SW + Access SW + Access points
Core SW:
act as a dhcp server for wireless user
for WLAN vlan 16 is configured on it
configured dhcp pool here for vlan 16
Access SW:
access points are cooneted with it
and every switch port assign to vlan 16 that is connected to AP
Standalone Access Points:
connected to access switch and have assigned static management IPs from vlan 16 that i have excluded in DHCP Pool in core switch.
configure only one ssid and broadcast
both radio 5ghz and 4.2 ghz are up
i can ping the gateway from each Access point to core switch
but the users can not get the ip address from the ssid that is configured on APs.
below is the attached of configuration of the access point
please review the configuration and advise me where i have mistaken and what i have missing in the configuration?
please reply me ASAP because this is very urdent for me and your reply is very important for me
Thanks

Thanks for your reply Ven
actually i did not check that and it does make sence too may be problem with DHCP Scope
but you know why i did not check because there is an other scope on the core switch for Data users only the difference
of vlan numbers and names
but that data vlan users are getting ip addresses and connect normally to internet.
did you view the configuration that i attached with my 1st post?
if no please view it and advise me if i have any missing there.
further i ll check for DHCP in the morning to connect my laptop dirct with switch port to is that getting ip address or no.
Thanks

Cisco phone not getting ip address

Hi all ,
Cisco 2950 switch
Phone and dhcp server are in the same default vlan .PC's are getting ip address from dhcp server but not the phone
Thanks

Hi
I can see the mac address has registered on the switch . And i have tried couple of phones , result was same .
Then i did run a packet sniffing using wireshark .
I could see dhcp discover from the phone and offer from the server a couple of times .
i am attaching the dhcp offer part from the wireshark .
And i saw one error also
Error part
Option: (150) TFTP Server Address
Length: 11
TFTP Server Address: 49.48.46.48 (49.48.46.48)
TFTP Server Address: 46.55.49.46 (46.55.49.46)
[Expert Info (Error/Protocol): Option length isn't a multiple of 4]
[Option length isn't a multiple of 4]
[Severity level: Error]
[Group: Protocol]
Option: (255) End
Option End: 255
i don't have any idea about the Tftp server address mentioned above .

Not getting IP address

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