Question

Wrong MAC Address Appearing in Windows ARP Cache

Asked by: jbailey01

I am running a 2 node Windows 2000 cluster with 3 instances of SQL 2000. One of the instances, SQLSERVER01, is used exclusively by a front end Windows Server 2003 WebServer. Problem I am having is, when the SQLSERVER01 instance resides on a specific node of the cluster, the web server can communicate with it just fine. When the instance is moved to the other node in the cluster, the web server receives the updated MAC from the clusters ARP broadcast, but after two minutes or so it reverts back to the MAC of the original cluster node, and service is disrupted. I can do an 'arp -d' to clear the web servers ARP cache and everything is alright for another two minutes, when all of a sudden the wrong MAC shows up again in the web servers ARP table. I have checked other client machines on the VLAN and they all have the correct MAC address, seems to be only effecting the web server that is constantly communicating with the cluster. I have checked the switch, a Cisco 3548XL, and its ARP cache shows the correct MAC address.

Any ideas? If any clarification is needed just let me know.

Thanks,
JBailey

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Asked On
2004-03-05 at 07:49:40ID20908402
Tags

arp

,

cluster

Topic

Windows 2003 Server

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: What90Posted on 2004-03-05 at 08:00:43ID: 10523834

Hi jbailey01,

Check this Ms link for why it does this "feature" in Clustering
http://www.microsoft.com/windows2000/en/advanced/help/single_network_interface_card.htm

Fols with similar problems:
http://www.tek-tips.com/gviewthread.cfm/lev2/3/lev3/19/pid/737/qid/528154
 

 

by: jbailey01Posted on 2004-03-05 at 08:10:49ID: 10523944

Thats for a Network Load Balanced Environment. Wrong type of cluster.

 

by: Cypher188Posted on 2004-03-09 at 17:57:01ID: 10556969

Hi

I dont know much about clustering but I would suggest trying a new NIC. I have had an issue when a NIC would work fine for about 2mins then stop responding to requests from the network, the solution was another new NIC. works fine.

I hope this helps.
Good Luck.
Chris


 

by: jbailey01Posted on 2004-03-10 at 09:16:53ID: 10562648

I was thinking that. I'll probably end up calling Dell today to do that.

 

by: jbailey01Posted on 2004-03-10 at 11:36:00ID: 10564135

Ended up to be a NIC driver issue. Broadcoms NIC teaming stuff isnt so hot with clusters apparently

 

by: Cypher188Posted on 2004-03-10 at 11:41:11ID: 10564186

Good to hear that its been fixed. Any ideas on what sort of NIC would work better? I mainly use 3Coms for my servers as I find they are reliable.

 

by: jbailey01Posted on 2004-03-10 at 11:44:49ID: 10564219

3COMs or Intel have never casued problems for me. Unfortunately, I think all Dell servers come with integrated Broadcom NICs.

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