Attached you find an improved Template for Interface Discovery. This is an alternative to the existing "Template SNMP Interfaces" (2.0.0rc4 trunk version 27125).

This Template uses LLD to discover all Interfaces, there are two discovery rules. One for 32bit Counters (like ifInOctets) and one for 64bit Counters (like ifHCInOctets).

The Item Prototypes are all SNMPv2, and SNMP Community and SNMP Port is configured by {$USER_MACROS}.
User Macro {$SNMP_C} defines the community, {$SNMP_P} defines the SNMP Port.

Maybe you would like to include that Template?
Feel free to modify it.

Btw: A good place to exchange Templates for the Zabbix Community would be very helpfull.