Dhcp Failed Apipa Is Being Used
A technician replaces a failed router in an office with the same model unit using the default settings. After the installation, the technician reboots all of the PCs and servers. Upon reboot some of the PCs are receiving IP addresses on the same subnet as the new router; other PCs are receiving addresses on the same subnet as the servers. When a Windows computer failed to get a valid IP address from DHCP server, OS will automatically assign a Windows generated Automatic Private IP address called APIPA to it. This automatic Private IP address is in the range 169.254.0.1 to 169.254.255.254.
Hi, currently using Packet tracer i am trying to configure my Router for a DHCP Server (It is an optional task but would like to understand how it works).I am trying to assign 20 PC's with a IP Address between therange 175.200.0.225 - 175.200.0.254.Whilst the network address is 175.200.0.224 and subnet of255.255.255.224. This is the config i am entering (Withing global config).int fa0/0.ip address 175.200.0.225 255.255.255.224.no shut.exit.ip dhcp pool Admin.network 175.200.0.224 225.255.255.224.default-route 175.200.0.255.ip dhcp exclude 175.200.0.255 175.200.0.254Whenever i try to check the DHCP ip address of the 3 connect PCs (I will be addingmore) it says 'dhcp failed.apipa is being used'Anybody know why? Or what i am not doing correctly?.default-route 175.200.0.255.ip dhcp exclude 175.200.0.255 175.200.0.254Your first command here should be default-router, with the IP address of the default gateway on the subnet (presumably 175.200.0.225).Second, your excluded address range is incorrect. First, your range should list the smaller address before the larger address, if you're using a range. Second, you do not need to specifically exclude the network/broadcast addresses in a DHCP pool - the router is smart enough to omit those by default. Third, and what is likely causing you problems, you need to exclude any static IPs in your subnet, such as the router interface here, which you aren't doing. What's probably happening is that DHCP is trying to pass our the.225 address (the first item in the pool), which fails when GARP is used to search check for duplicate addresses.Fix those, and if there are still issues, there is likely something more going on than what we can see just from your config snippet.
Kenapa Dhcp Failed Apipa Is Being Used
We'd need the topology and full config information for any devices in the path from PCs to router. If you have switches in between, those could be causing issues if they're not configured properly as well.
BackgroundI just finished setting up a Server 2012 r2 install. It is the only server in the forest and I am only utilizing 1 NIC (it has two, but the second is disabled). It is the DC and handles DNS and DHCP. I have statics set for the IPv4 and DNS pointing to the server IP address. I have IPv6 turned off as we aren't using it.
Apipa Ip Range
I do not have WINS installed as we have no need for it. The ProblemComputers on the network are unable to navigate to webpages. When I do a ipconfig /all on a networked PC I get the right DHCP server (the DC's IP), it is assigning leases properly, the Gateway is correct, and of course the ip is being assigned and within the correct range.However, the IPv6 is displaying information, I'm not sure that anything should be there. I have it unchecked on the server as well as the local PC. And the big issue is that APIPA addresses are showing for DNS (one entry only as I didn't set up a alternate) and WINS. I don't have WINS installed as a service on the server. What I've CheckedI checked the records in DNS and can't find a reference to the APIPA address (I could be overlooking it, but I think I checked about every record I could find). I am not using reverse look up so no records are present there. I have forwarders set up to point to google dns (8.8.8.8 and 8.8.4.4).DCHP is showing the correct address and is started and authorized.I've added the DNS server option to DHCP.DNS is giving me these Information events: Event 4, 2, 769, and warning 4013.
I believe these are all before I restarted the server. I have no event log information after the restart. Work AroundI can go to each PC and manually set the DNS server to the DC's IP and internet connectivity is restored.Any pointers/help would be greatly appreciated!.