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Contributor II
Posts: 63
Registered: ‎07-23-2014

ARP_DUPLICATE_IPADDR_DETECT with active-active local controllers

Hi community

 

At several sites we have an active-active setup with two local controllers.

When clients roam from an AP, terminated on one local controller to an AP, terminated on the other local controller there are the following messages on the switch:

ARP/5/ARP_DUPLICATE_IPADDR_DETECT: Detected an IP address conflict. The device with MAC address e8b1-fc4c-1111 connected to Bridge-Aggregation1 in VLAN 301 and the device with MAC address e8b1-fc4c-1111 connected to Bridge-Aggregation2 in VLAN 301 are using the same IP address 10.49.89.21.

Could there be a way to prevent this, ie force an ARP update from the AP after roaming?

 

Thx

 

Aruba Employee
Posts: 159
Registered: ‎02-14-2013

Re: ARP_DUPLICATE_IPADDR_DETECT with active-active local controllers

Hi,

 

We cannot do anything on Aruba to prevent the error from showing up on the Switch. You need to figure out why the Switch is not updating the ARP entry.


Thanks,
Rajaguru Vincent

Thanks,
Rajaguru Vincent
CWNA | CWSP | CWAP | CWDP | ACMP
Contributor II
Posts: 63
Registered: ‎07-23-2014

Re: ARP_DUPLICATE_IPADDR_DETECT with active-active local controllers

Hi Raj

 

Thx for the reply.

I am still figuring out why the hp switches see this as a duplicate IP in stead of simply updating the ARP table. I'll reply here as soon as I know.

 

 

Contributor II
Posts: 63
Registered: ‎07-23-2014

Re: ARP_DUPLICATE_IPADDR_DETECT with active-active local controllers

As promised...in our case the duplicate IP messages were due to a software bug in the switch. After a firmware upgrade the messages were gone.

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