Dyanic Index for Interfaces - Unable to get it working

[chhibber]

Currently I am trying to use the following SNMP IOD after reading some posts regarding Dyanmic indexes. There was one specific post that suggested that the followign should work.

ifInOctets[index,ifDescr,$1]

Unfortunately this has been failing with the following error:

Cannot find index [ifDescr] of the OID [ifInOctets[index,ifDescr,$1]]

I have also tried using (64 bit counters)

ifHCInOCtets[index,ifDescr,$1]

With the following key:

ifInOctets.[GigabitEthernet1/0/1]

I recieve the same error as above

Cannot find index [ifDescr] of the OID [ifInOctets[index,ifDescr,$1]]

I have also used the OID's for all the snmp variables with no luck :/

The OID and name values all return valid data via snmpwalk.
I am using zabbix 1.6.

Any pointers, example? Can someone post a item breakdown if they have a functional item with snmp dyanmic indexes?

Thanks,
Sono