MAC to IP address mapping return empty result

MAC to IP address mapping return empty result

Hi,

we are evalueting oputils in a network enviroment with different subnets in remote branch office: we have add cisco gateway for mac to ip address mapping, but no result is returned. After further investigating we found that the oid ipNetToPhysicalPhysAddress 1.3.6.1.2.1.4.35.1.4 used for snmp query return empty result.
With MIB Browser Tool we found that with oid .1.3.6.1.2.1.4.22.1.2 present in RFC1212-MIB we get all mac address -> ip mapping.

We have searched through doumentation but we havent found how to specify which mib to use for a specific router.