Device monitored by snmpcollector probe is not displaying all interfaces. Interfaces missing are all configured as ifType=1.
Interfaces of ifType=1 are not displayed by default.
Release : 20.3
Component : UIM - SNMPCOLLECTOR
You can disable the vendor certification file "snmp_port.xml".
A similar solution is described in another document. It leaves the xml file enabled but edits the contents of the snmp-port.xml file.