Some examples and notes

Description walk example:
snmpwalk -v2c -c public 192.168.180.100 1.3.6.1.2.1.31.1.1.1.18 | grep -i "LTK_"
Alias walk:
snmpwalk -v2c -c public 192.168.180.100 .1.3.6.1.2.1.31.1.1.1.1

Siemens Hid example:
snmpwalk -v2c -c Ziemen5Power 192.168.182.34 .1.3.6.1.2.1.31.1.1.1.1
snmpwalk -v2c -c Ziemen5Power 192.168.182.34 .1.3.6.1.2.1.31.1.1.1.18

OmniSwitch example:
snmpwalk -v2c -c public 192.168.181.59 .1.3.6.1.2.1.31.1.1.1.1
snmpwalk -v2c -c public 192.168.181.59 .1.3.6.1.2.1.31.1.1.1.18
snmpwalk -v2c -c public 192.168.181.59 .1.3.6.1.2.1.31.1.1.1.15

ASR example:
snmpwalk -v2c -c lan2lan 192.168.148.56 1.3.6.1.2.1.31.1.1.1.18 | grep -i "LTK_"

OIDs for items:
  in_oct_oid = '1.3.6.1.2.1.31.1.1.1.6.%s' % subif_idx
  out_oct_oid = '1.3.6.1.2.1.31.1.1.1.10.%s' % subif_idx

  in_ucast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.7.%s' % subif_idx
  out_ucast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.11.%s' % subif_idx

  in_mcast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.8.%s' % subif_idx
  out_mcast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.12.%s' % subif_idx

  in_bcast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.9.%s' % subif_idx
  out_bcast_pkts_oid = '1.3.6.1.2.1.31.1.1.1.13.%s' % subif_idx

  in_errors_oid = '.1.3.6.1.2.1.2.2.1.14.%s' % subif_idx
  out_errors_oid = '.1.3.6.1.2.1.2.2.1.20.%s' % subif_idx

  in_discards_oid = '.1.3.6.1.2.1.2.2.1.13.%s' % subif_idx
  out_discards_oid = '.1.3.6.1.2.1.2.2.1.19.%s' % subif_idx

  oper_state = '.1.3.6.1.2.1.2.2.1.8.%s' % subif_idx

XR example - all phy interfaces
python zabbix_snmp_interfaces_lld.py cisco_xr 192.168.133.24 public SA_riga-sa9-iptv4-3750e

XR example with custom descrp regexp and alias regexp - both are optional but if alias is needed, then descr is mandatory
python zabbix_snmp_interfaces_lld.py cisco_xr 192.168.133.249 public SA_riga-sa8-sw-4900 "^(\s+)?(LTK\_BGP\_|L3\_BGP\_)" "^(TenGigE|Bundle\-Ether)"

Input parameters: type, host, community, hostname, [descr_reg_string, alias_reg_string]
type can be - false. In that case you need to specify both: descr_reg_string, alias_reg_string as last parameters.

You can use predefined types as: cisco_ios, cisco_xr, hid, omni - for phy interface scanning. 
In that case descr and alias regexps are predefined.

If you need e.g. on crs to scan all phy interfaces without BGP labels, then you need to specify custom regexps.

ZAB_ can be used in description to include find that host in discovery.