Computer are releasing IP's

Microsoft Windows server 2003 enterprise
March 2, 2013 at 00:05:02
Specs: Windows XP, 3Ghz/1GB
Dear All,

I am facing weird Problem. Since i connected a wifi Router to one of my cisco switch most of the Computers starts releasing their IP's. DHCP is configured on the Core Cisco Switch.

Any help?


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March 2, 2013 at 01:42:54
Have you disabled DHCP on the new router? Two DHCP servers on one network would give you problems unless they are configured so that their ranges don't overlap.

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March 2, 2013 at 21:48:40
I agree with ijack. Sounds like too many roosters in the hen house.

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March 2, 2013 at 21:49:06
yes man, i have Disabled even though the same problem

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Related Solutions

March 3, 2013 at 01:43:49
Does the switch have logs? Have you looked at these, and the logs on the computers to see what is happening? Ultimately, if these do not provide the information, you might have to put a packet sneffer on the network to see exactly what DCCP packets are being sent, which device is responding to them, and what that response is.

On the face of it it doesn't really make sense that adding a router to the network with DHCP disabled would cause devices to release or renew their DHCP leases.

But , let's face it, you have given us very little information to go on. For example:

1. What is your full network topolgy. Other than this switch and wireless router, what other devices do you have? How are they interconnected.

2. What network ranges exist on your network. Presumably the network router is providing access to a different subnet than the rest of the network.

3. What exactly do you mean by "releasing their IPs"? Do they end up with any address at all? If so, which subnet is it on.

4. How are these computers connected to the network? Wireless or wired?

5. Does this only happen when you reboot the devices, or does it happen to active devices as soon as you connect the wireless router?

6. Does it happen to all devices on your network or just some?

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March 3, 2013 at 06:27:08
When you connected the SOHO Router to your switch, what port on the router did you connect to? (ie: WAN/LAN)

Are you performing NAT on the SOHO router and if so, why?

Why are you using a SOHO Router with what I must assume are Layer 2 and 3 switches? You should be using one, or more, AP's (access points) to provide your WLAN.

What is the lease time set to in your DHCP server settings?

3. What exactly do you mean by "releasing their IPs"? Do they end up with any address at all? If so, which subnet is it on.

Indeed, describe exactly what is happening and include any/all IP addresses the clients end up with........especially if they end up with an APIPA address.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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