modules:
  # Default IF-MIB interfaces table with ifIndex.
  if_mib:
    walk: [sysUpTime, interfaces, ifXTable]
  # Interfaces if ifAlias is unique.
  if_mib_ifalias:
    walk: [sysUpTime, interfaces, ifXTable]
    lookups:
      - old_index: ifIndex
        new_index: ifAlias
  # Interfaces if ifDescr is unique.
  if_mib_ifdescr:
    walk: [sysUpTime, interfaces, ifXTable]
    lookups:
      - old_index: ifIndex
        new_index: ifDescr
  # Interfaces if ifName is unique.
  if_mib_ifname:
    walk: [sysUpTime, interfaces, ifXTable]
    lookups:
      - old_index: ifIndex
        # Use OID to avoid conflict with Netscaler NS-ROOT-MIB.
        new_index: 1.3.6.1.2.1.31.1.1.1.1 # ifName