Re: arp table - same mac address shows two ip addresses

On 10/16/2018 04:31 PM, Leroy Tennison wrote:
> (1.2.3.4 is an arbitrary replacement but doesn't affect the basic issue) 
> What is causing this?  The systems in question have only one interface per 
> subnet but both systems have multiple NICs which are on the same subnets. 
> What I mean is this:  on both systems NIC1 connects to subnet 1, NIC2 to 
> subnet 2 and so on for five NICs and different subnets.  The subnets do 
> have different IP ranges (no overlap).  10.222.109.3 does happen to be 
> on the same system as 1.2.3.4 but it doesn't have the same mac address 
> and it is a physical interface.

I can't tell for sure.  Are the NICs connected to the same L2 network 
segment / broadcast domain?

This almost sounds as if NIC1 is responding to ARP requests for NIC{2..5}.

> Address        HWType   HWAddress           Flags   Mask   Iface
> 10.222.109.3   ether    bc:30:5b:a6:c4:bf   C              eth9
> 1.2.3.4        ether    bc:30:5b:a6:c4:bf   C              eth9

Unfortunately this doesn't clearly indicate if the NICs are using the 
same L2 network segment / broadcast domain or not.



-- 
Grant. . . .
unix || die