Manual IP and DHCP conflicts
My Barricade g died (SMC2804WBRP-G). I replaced it with an Airport Extreme (802.11g).
With the Barricade g, I had manually assigned IP address to all the computers on the LAN (range 192.168.x.1-192.168.x.99). The router distributed IP addresses to the wireless clients via DHCP range (192.162.x.100-192.168.x.200)
I've setup the AEBS to Distribute IP addresses and selected Share a single IP address (using DHCP and NAT).
BUT, the AEBS is assigning some of the manual addresses to wireless client IP requests. Then the computer that is supposed to have a manual IP address doesn't have one. Basically, the manual and DHCP addresses are coming from the same pool and causing conflicts.
How do I deal with manual IP addresses AND DHCP with this router?
Thanks
David,
Thanks for the input. But, I may have misread my post.
From my original post.
'With the Barricade g, I had manually assigned IP address to all the computers on the LAN (range 192.168.x.1-192.168.x.99). The router distributed IP addresses to the wireless clients via DHCP range (192.162.x.100-192.168.x.200).'
In other words, on the network, LAN=static IPs, Wireless clients=DHCP.
You can have both static and DHCP on the same network.
Similar Messages
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How to manually configure and then use DHCP
I'm having problems with internet connectivity. If I try to configure in Airport Utility, there are two choices - manual or use DHCP. If I allow AU to renew the DCHP lease, I end up with a bad IP address (one of those 169.... ones). If I configure manually and put in the IP address my service provide gave me, then I can input the address, but without the lease renewal, it won't connect. Put in the address in manual, switch to renew the lease, the bad address shows up.
Obviously, since I'm writing this on-line I have connectivity, via the Ethernet port in the back of my iMac, which has the correct IP address I had to type in and is also using DHCP.
So, what's the difference? Why won't Airport line up things just as the Ethernet network will?It sounds like your cable/DSL modem is not properly recognizing the AirPort Express Base Station (AX). Most of the time this can be remedied by just performing a complete power recycle when changing network configurations ... like when you switch what is connected to the modem.
Try the following, in order, checking for Internet access after each step, until resolved:
1. If the modem has a reset switch, use it to reset the modem. Wait at least 5-10 minutes for the modem to initialize.
2. Remove power from the modem. If it has a backup battery, remove this as well. Wait 5-10 minutes. Replace the battery, and add power back to the modem.
3. Perform a complete power recycle of your network components as follows:
Modem/Router Power Recycling - Quick
o Power-off the modem, AX, & computer(s); Wait at least 5 minutes.
o Power-on the modem; Wait at least 5 minutes.
o Power-on the AX; Wait at least 5 minutes.
o Power-on the computer(s)
If this fails to get the modem to "recognize" the Internet router, then try the "Full" version.
Modem/Router Power ReCycling - Full
o Power-off the modem, AX, & computer(s). (Wait at least 30 minutes. If possible, leave the modem off overnight.)
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o Power-on the AX; Wait at least 5 minutes.
o Power-on the computer(s)
4. Contact your ISP to have them perform a "modem reset." -
Solaris 10 zone configuration with sysidcfg and dhcp and hostname
Hi
Excuse me if I look like a n00b... it's probably because I'm a n00b.
I've been struggling in the dark for more than 2 days now and I'm wondering if I'm thinking about this all wrong...
I have stand-alone server where I need to run zones. I want to create zones and automagically configure them at boot (read: by running a script). So here's what I need...
A zone
starting from unconfigured state
whose hostname is not the same as the zone name
using corporate DHCP to get its IP address
with DNS config coming from the DHCP server
registering its address the DNS
with a preconfigured root password
(I don't own the corporate DHCP or DNS servers, I can't put my own DHCP or DNS servers on the network.)
I would lke to create the zone, throw some config at it, then boot the zone and walk away. I am using zones with exclusive-IP. I can construct the zones and manually configure them once they're started to have DHCP, my own name, registered IP address with DNS and everything else I have specified above. But I don't want to do it manually...
Sysidcfg seems to do some of what I want but not entirely.
In sysidcfg I can set the root_password, the primary interface using DHCP, DNS server. I can't set a hostname in sysidcfg AND use configure it for DHCP. So the hostname is not what I want it to be after the zone is started and ready to go. The DHCP server is providing the DNS configuration, Solaris does not seem to honour it, but i'll ignore that for the moment.
I have tried various combinations of using sysidcfg, /etc/nodename, /etc/hostname.+interface+ and /etc/dhcp.+interface+ but I can't find any combination that actually works.
I can write to the zonestorage/etc/nodename to set the nodename, that works. But it does not match the DHCP address, so I get prompted for a new name service because it can't find a DNS entry for the name.
I can write to the zonestorage/etc/hostname.+interface+ and /etc/dhcp.+interface+ (to get the system to register its name with the DNS server after getting its DHCP address) but then I get a system with no root password and no DNS configuration, even though they are set in the sysidcfg file.
I can write a script that gets part of the way using sysidcfg and /etc/... files, then boots the zone and then runs a bunch of voodoo via zlogin commands to fix all the stuff that couldn't be done 'properly', but that's not a 'boot and walk away' environment. I can write a script that uses sysidcfg and hacks around with other files in /etc (like nsswitch.conf, resolv.conf), but that just feels likes a dirty hack to fix something that wasn't done properly in the first place.
So where am I going wrong and how do I do it right (within the constraints defined)? Why can't I configure, boot and walk away?
ThanksThanks abrante
Thanks for your response!
I don't think the config is messed up after the installation. I think the installation is fine, it's just not what I want :-)
I'm trying to decouple the zonename from the system name and get DNS registrations working. After installation, a DHCP client can get its hostname from DNS but I'm trying to do it the other way around. I want the DHCP client specify its own hostname, get an address from the DHCP server and then register its hostname with DNS. If the system gets its name from DNS/DHCP then I have to configure those to provide the system name and I don't own the DHCP/DNS infrastructure. These zones are for a development/QA environment, so we create and reconfigure these frequently. Hence the need to specify the system name within the zone and register that name in the DNS.
I have tried fiddling with the PARAM_REQUEST_LIST but it does not seem to be working as I expect. :-$ Removing 12 did not help with setting the hostname from the system. DNS does not have a registered name for this system anyway, so even if it tried to get a name for this system, it would get nothing.
I also do want the DHCP to change the DNS server and domain name, but this does not happen even though my dhcpagent includes 6 and 15 in the PARAM_REQUEST_LIST. I still have to set them in the sysidcfg file because it is always ignored in Solaris (S10u8 with 10_Recommended 30-Jul-2010)
As stated, I know I can hack around with the system after it has booted. But I'm trying to configure the system before it starts and let it take care of itself and not have to touch it. Frankly I'm surprised that the sysidcfg does not allow you to set a hostname name when you are using DHCP, that the default DHCP configuration does not register the system name with the DNS server, and the DNS config from the DHCP response is ignored. Even a sys-unconfiged system requires DNS configuration during initial boot, when I know that the DHCP response contains DNS information.
FYI: Windows systems using DHCP work as expected in this respect by default, i.e. set system name, use DHCP --> system gets address from corporate DHCP, DNS settings are set from DHCP information, DNS registration is made for system name.
I'm working around this at the moment... I call my zone by the system name I want, I hardcode the DNS settings in the sysidcfg file and I create the hostname.+nic+ and dhcp.+nic+ files in the zone storage to get the system to register its name with DNS, them boot.
Edited by: cydonian on Aug 19, 2010 7:45 PM -
Trying to resolve a DHCP conflict involving Airport Extreme
I have my LAN set up so that the router hands out addresses with DHCP in the 192.168.1 range. Also on the network is an Airport Extreme (an older 11g model running the 5.7 firmware). I am having a terrible time trying to configure it so that it hands out addresses to its clients in the 10.0.1 range. No matter what I try, the Airport DHCP server is overridden by the DHCP server on the main router and a 192.168 address is assigned.
On the first configuration page of Airport Utility under the Internet tab, I have chosen Connect using Ethernet and DHCP. And I have chosen "Share a public IP address." Under the DHCP tab I've indicated beginning and ending IP addresses from 10.0.1.10 to 10.0.1.20. Why then when I connect to the airport with, say, my laptop, do I get a 192.168 address?
Any advice would be much appreciated.What you are trying to do is quite common, but perhaps the key is that the LAN with the DHCP router assigning 192.168.1 addresses must be connected to the AEBS via its WAN port.
In a default (configured from Factory Reset) scenario, the AEBS will request an IP address from the router via DHCP for itself, and will distribute IP addresses for its clients (wireless and via its LAN port) via DHCP from the pool you've specified if you have it set up to "Share a public IP address."
You can read more about setting up this type of network starting on page 24 of the Apple manual Designing AirPort Networks.
I suspect what's happening is the router is connected to your AirPort's LAN port, which causes a race condition between the two DHCP servers as to which will provide an address to new network devices. -
Network configuration: fully manual vs. DHCP with manual IP
Are there any OS X Server services (e.g. AFP, DHCP, DNS, OD, LDAP) that specifically require a server's network settings to be manually configured, or can they all get my with just manual IP and the rest of the configuration supplied by DHCP?
Oddly enough, I set up a server with DHCP and manual IP and added its IP to a DHCP subnet. But it was also the DHCP server. It did not accept the DHCP-delivered configuration (e.g. it couldn't find the router).
Is it the case that a DHCP server cannot serve itself with network config information? -
Detect / Resolve Conflicts: Automatically detect and resolve conflicts
Hi
From documentation:http://technet.oracle.com/products/oracle9i/daily/jun05.html
" Detect / Resolve Conflicts: Automatically detect and resolve conflicts "
I know that the detection of the conflicts between versions is automatic, but I didn't know that the resolution was also automatic.
So Can you tell me, please, in which cases the resolution of conflicts is automatic?
thank you in advance
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DHCP Conflict Detection & Win 7 Firewall..
This may be a stupid question, but I can't quite find the answer....
We have a small network, about 200 computers (Server 2012), Win 7 workstations (Very Few XP's left)
I had one workstation detect an IP conflict (XP if it makes any difference), and it just was assigned another address
and it was on its merry way. I took a look at the DHCP server and realized that I never turned on DHCP Conflict detection.
I turned it on and set it for 1 attempt.
So for the heck of it I pinged the workstation and DNS worked but ping is blocked on the workstations firewall.
Which made me wonder if I should push out a GP to allow ping to all the workstations???? (Question 1)
Question two: If I do that to all the workstations, what would stop it from happening if someone brings a "guest"
laptop into the building??
What would be best options? or is it working as it should and I am just Paranoid!! LOL
Thank You in advance for any advice
Wolverine..Hi,
According to
this article, Client computers running Windows Server 2008, Windows Vista, Windows Server 2003, Windows XP, Windows 2000, Windows NT 4.0, Windows Millennium Edition, and Windows 98 automatically check to determine if an IP address is already in use before
using it. I think this behavior still exists in windows server 2012.
On the server-side, when a DHCP client requests a lease, a DHCP server checks its pool of available addresses and assigns the client a lease on an available IPv4 address. By default, the server checks only the list of current leases to determine whether an
address is available. It doesn’t actually query the network to see whether an address is in use. If you enable address conflict detection, the DHCP server uses the ping process to test available scope IP addresses before including these addresses in DHCP lease
offers to clients.
In addition, each additional conflict detection attempt delays the DHCP server response by a second while waiting for the ping request to time out. This increases the load on the server, so it is not recommended to set the value greater than two for ping attempts.
Hope this helps!
Best regards,
Susie -
DHCP conflict due to Gratuitous ARP.
One of my wireless VLAN DHCP scope on cisco core switch is often exhausted due to Gratuitous ARP.
Please help me to check what is the cause of this.I have a VLAN with DHCP SCOPE and layer 3 configured on core switch.
the DHCP pool often gets exhausted and when I do show ip dhcp conflict most of the IPs conflicted due to Gratuitous arp
CORESWITCH# show ip dhcp conflict
172.28.106.195 Gratuitous ARP Oct 14 2014 04:44 PM
172.28.106.54 Gratuitous ARP Oct 14 2014 04:49 PM
172.28.106.189 Gratuitous ARP Oct 15 2014 12:28 PM
172.28.106.55 Gratuitous ARP Oct 17 2014 02:05 PM
172.28.106.74 Gratuitous ARP Oct 21 2014 09:39 AM
172.28.106.72 Gratuitous ARP Oct 23 2014 02:26 PM
172.28.106.89 Gratuitous ARP Oct 28 2014 03:09 PM
172.28.106.119 Gratuitous ARP Nov 03 2014 01:39 PM
172.28.106.124 Gratuitous ARP Nov 05 2014 08:03 AM
172.28.106.127 Gratuitous ARP Nov 05 2014 02:56 PM
172.28.106.131 Gratuitous ARP Nov 08 2014 01:59 PM
172.28.106.153 Gratuitous ARP Nov 10 2014 12:14 PM
172.28.106.139 Gratuitous ARP Nov 11 2014 07:57 AM
172.28.106.143 Gratuitous ARP Nov 11 2014 09:28 AM
172.28.106.157 Gratuitous ARP Nov 11 2014 02:36 PM
172.28.106.156 Gratuitous ARP Nov 11 2014 07:55 PM
172.28.106.162 Gratuitous ARP Nov 13 2014 06:48 PM
172.28.106.187 Gratuitous ARP Nov 18 2014 01:57 PM
172.28.106.176 Gratuitous ARP Nov 19 2014 02:30 PM
172.28.106.53 Gratuitous ARP Nov 19 2014 02:47 PM
172.28.106.199 Gratuitous ARP Nov 20 2014 11:18 AM
172.28.106.61 Gratuitous ARP Nov 20 2014 01:27 PM
172.28.106.56 Gratuitous ARP Nov 20 2014 01:39 PM
172.28.106.63 Gratuitous ARP Nov 21 2014 02:15 PM
172.28.106.85 Gratuitous ARP Nov 24 2014 07:17 PM
172.28.106.92 Gratuitous ARP Nov 25 2014 10:47 AM
172.28.106.95 Gratuitous ARP Nov 25 2014 02:14 PM
172.28.106.97 Gratuitous ARP Nov 27 2014 04:19 PM
172.28.106.100 Gratuitous ARP Nov 28 2014 09:18 AM
172.28.106.79 Gratuitous ARP Nov 28 2014 11:09 AM
172.28.106.104 Gratuitous ARP Nov 28 2014 05:20 PM
172.28.106.129 Gratuitous ARP Dec 01 2014 09:53 AM
172.28.106.130 Gratuitous ARP Dec 01 2014 11:19 AM
172.28.106.133 Gratuitous ARP Dec 01 2014 11:36 AM
172.28.106.134 Gratuitous ARP Dec 01 2014 03:04 PM
172.28.106.135 Gratuitous ARP Dec 01 2014 03:47 PM
172.28.106.136 Gratuitous ARP Dec 01 2014 04:13 PM
172.28.106.137 Gratuitous ARP Dec 02 2014 12:28 PM
172.28.106.141 Gratuitous ARP Dec 03 2014 09:33 AM
172.28.106.149 Gratuitous ARP Dec 05 2014 02:01 PM
172.28.106.151 Gratuitous ARP Dec 05 2014 04:21 PM
172.28.106.173 Gratuitous ARP Dec 08 2014 06:40 PM
172.28.106.182 Gratuitous ARP Dec 09 2014 09:28 AM
172.28.106.158 Gratuitous ARP Dec 09 2014 04:46 PM
172.28.106.185 Gratuitous ARP Dec 09 2014 05:05 PM
172.28.106.188 Gratuitous ARP Dec 10 2014 02:56 PM
172.28.106.186 Gratuitous ARP Dec 10 2014 06:19 PM
172.28.106.193 Gratuitous ARP Dec 12 2014 12:48 PM
172.28.106.75 Gratuitous ARP Dec 16 2014 02:37 PM
172.28.106.68 Gratuitous ARP Dec 16 2014 04:05 PM
172.28.106.80 Gratuitous ARP Dec 16 2014 06:02 PM
172.28.106.81 Gratuitous ARP Dec 17 2014 03:11 PM
172.28.106.84 Gratuitous ARP Dec 19 2014 02:03 PM
172.28.106.115 Gratuitous ARP Dec 23 2014 10:35 AM
172.28.106.78 Gratuitous ARP Dec 23 2014 01:37 PM
172.28.106.121 Gratuitous ARP Dec 24 2014 06:18 PM
172.28.106.125 Gratuitous ARP Dec 26 2014 10:02 AM
172.28.106.161 Gratuitous ARP Dec 29 2014 12:01 PM
172.28.106.181 Gratuitous ARP Dec 29 2014 03:08 PM
172.28.106.184 Gratuitous ARP Dec 30 2014 05:25 PM
172.28.106.66 Gratuitous ARP Jan 02 2015 09:44 AM
172.28.106.194 Gratuitous ARP Jan 03 2015 03:14 PM
172.28.106.106 Gratuitous ARP Jan 07 2015 01:54 PM
172.28.106.112 Gratuitous ARP Jan 07 2015 04:32 PM
172.28.106.113 Gratuitous ARP Jan 08 2015 04:48 PM
172.28.106.103 Gratuitous ARP Jan 09 2015 12:53 PM
172.28.106.164 Gratuitous ARP Jan 13 2015 12:13 PM
172.28.106.155 Gratuitous ARP Jan 13 2015 03:54 PM
172.28.106.168 Gratuitous ARP Jan 13 2015 05:12 PM
172.28.106.169 Gratuitous ARP Jan 14 2015 05:07 PM
172.28.106.170 Gratuitous ARP Jan 14 2015 05:50 PM
172.28.106.197 Gratuitous ARP Jan 16 2015 06:18 PM
172.28.106.60 Gratuitous ARP Jan 19 2015 07:56 AM
172.28.106.88 Gratuitous ARP Jan 19 2015 05:17 PM
172.28.106.94 Gratuitous ARP Jan 20 2015 12:46 PM
172.28.106.101 Gratuitous ARP Jan 21 2015 10:15 AM
172.28.106.102 Gratuitous ARP Jan 21 2015 02:08 PM
172.28.106.147 Gratuitous ARP Jan 28 2015 11:04 AM
172.28.106.159 Gratuitous ARP Jan 28 2015 12:37 PM
172.28.106.128 Gratuitous ARP Jan 28 2015 02:27 PM
172.28.106.165 Gratuitous ARP Jan 29 2015 12:31 PM
172.28.106.166 Gratuitous ARP Jan 30 2015 07:40 AM
172.28.106.178 Gratuitous ARP Jan 30 2015 02:20 PM
172.28.106.183 Gratuitous ARP Jan 30 2015 02:39 PM
172.28.106.69 Gratuitous ARP Feb 02 2015 09:40 AM
172.28.106.76 Gratuitous ARP Feb 02 2015 07:18 PM
172.28.106.91 Gratuitous ARP Feb 02 2015 08:17 PM
172.28.106.93 Gratuitous ARP Feb 02 2015 08:20 PM
172.28.106.200 Gratuitous ARP Feb 04 2015 01:41 PM
172.28.106.96 Gratuitous ARP Feb 05 2015 09:57 AM
172.28.106.111 Gratuitous ARP Feb 05 2015 01:42 PM
172.28.106.108 Gratuitous ARP Feb 06 2015 08:04 AM
172.28.106.122 Gratuitous ARP Feb 09 2015 05:11 PM
172.28.106.174 Gratuitous ARP Feb 11 2015 06:17 PM
172.28.106.179 Gratuitous ARP Feb 12 2015 06:18 PM
172.28.106.83 Gratuitous ARP Feb 16 2015 03:56 PM -
Not sure if I am doing this right. This is my first time in the support community.
I imagine what I put in my heading was supposed to go in here.
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http://keithbalomben.wordpress.com/2012/03/29/telus-actiontec-v1000h-hacks-and-i nformation/
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