rwaldron23
1 Copper

Poweredge T710 - IPconflict

Hi all,

Last week we installed a Power edge T710 server on the network..

Ever since, our time server has complained about an ipconflict.

The Time server says it has an IP conflict on IP address *.*.*.61 with a device with MAC address F0-4D-A2-3F-75-8F

the problem is, I can't find any device using this MAC address and therefore its IP address.

The Dell Poweredge has 4 NICs, 3 are disabled. .The 3 MAC addresses are very similar to the MAC that timeserver is complaining about but NOT identical.

The last 2 digits on all 4 NICs are different but they all start with  F0-4D-A2-3F-75-__

IP address of poweredge is *.*.*.248

I ran a ping range on both poweredge and time server and then used arp - a to read back MAC addresses.

I got a list of MAC address from each but none where F0-4D-A2-3F-75-8F.

When you http://*.*.*.61 you hit a Dell open manage login screen..When you disconnect poweredge from the network and repeat you no longer get the DELL open manage login screen so this is why we think the poweredge is causing a conflict..

I suppose my question is..... can the poweredge somehow be using MAC F0-4D-A2-3F-75-8F ?

Has anyone else seen issues with server 2008 doing similar?

 

THx in advance

Ray..

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4 Replies
Dev Mgr
6 Gallium

Re: Poweredge T710 - IPconflict

Duplicate MAC addresses shouldn't happen, but due to the limited number of available MAC addresses (world wide), it does.

 

As you have 4 NIC ports, you could move your cable, enable that NIC port and set the IP on there. The other port should have a different MAC.

Member since 2003

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rwaldron23
1 Copper

Re: Poweredge T710 - IPconflict

Hiya and thx for the reply..

 

The thing is, none of my 4 NICs have the same MAC address as the MAC address named in client PC Conflict.

Client warns of ipconflict with device at MAC address F0-4D-A2-3F-75-97

MAC address of all 4 NIC's DO NOT match this..

Would this mean that there is NO WAY  that my poweredge server is the cause of the conflict ?

 

Ray..

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pcmeiners
4 Germanium

Re: Poweredge T710 - IPconflict

According to the MAC prefix, it is a Dell device..

http://hwaddress.com/?q=F0-4D-A2-3F-75

Does ipconfig /all   show anything?

 

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martinmsr
1 Copper

Re: Poweredge T710 - IPconflict

Could you solve this problem? the same thing happens to me with a dell server with 2 NICs. The ARP tables of the clients are completed with an erroneous MAC for the server. That MAC is almost identical to the MACs of the original NICs.
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