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Still a problem ......

By msnarayanan ·
I have a very strange problem going on. My Ip addresses are getting conflicted eventhough I am using DHCP throughout ! My setup is something like this :
I have a DHCP server sitting on my PDC which leases out IP addresses indefnitely to all the clientso ver LAN and WAN. We have a mixture of Cisco and Synoptics hubs all over. Lately when a client boots up , it gives out an IP address conflict. If that machine is shut down , I cant ping the address but when it is UP , I can ping the IP address but the mach ine itself gives a conflict message ! So the question is with whom is it conflicting with ?
The only turn around that I have managed till date is to exclude the conflicting IP address from the DHCP list and then again reboot the client. This way thecli ent gets a new IP address. But I have till date excluded some 50 IP addresses and I am running out of it.
Someone told me that it is because of Synoptics hub that we are using. Is that so ? I tried all the Nortel, Microsoft and Cisco websites for a

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Still a problem ......

by Bra-k In reply to Still a problem ......

Is your lan connected to any other networks offsite. If it is we have had simular problems from other sites replicating from a corupted database. We would have to rereplicate to resovle the problem. We also had the problem that we ran out of ip addressesand the DHCP began issuing numbers that were already in use.

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Still a problem ......

by msnarayanan In reply to Still a problem ......

The question was auto-closed by TechRepublic

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Still a problem ......

by rikto7 In reply to Still a problem ......

Ok here is my suggestion... Are your routers setup to allow bcast to pass through. If so then you could be getting conflicting data from another domain..etc. Also I have noticed if you set the Lease past 90 days DHCP sometimes has a problem releasing the computer from its IP even when Computer using that IP address releases it. The way to verify this is to use some Network Monitoring tool If you have SMS then you can run in promiscuous mode and capture all packets from DHCP. This will tell youwhere theconflict is coming from...IE across the router or such....I hope this helps out..This is how I determined what my problem was.. I changed the lease date to 90days and bam no more problems....

Rick

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Still a problem ......

by msnarayanan In reply to Still a problem ......

The question was auto-closed by TechRepublic

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Still a problem ......

by msnarayanan In reply to Still a problem ......

This question was auto closed due to inactivity

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