Werk #19976: Network interfaces: ifName is now a separately disableable SNMP section
| Component | Checks & agents | ||
| Title | Network interfaces: ifName is now a separately disableable SNMP section | ||
| Date | Jun 5, 2026 | ||
| Level | Trivial Change | ||
| Class | New Feature | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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With werk #19971 the shared if64 parser started fetching ifName
(OID .1.3.6.1.2.1.31.1.1.1.1) for every SNMP interface device in order
to populate the new name attribute and the Use name item appearance.
This added an extra interface table to the SNMP walk, which can worsen
existing performance issues on devices with many interfaces.
ifName is now fetched by its own SNMP section if_names instead of
being part of the main interface section. As a result, it can be disabled
independently of the rest of the interface data via the ruleset
Disabled or enabled sections (SNMP) (host rule, section name
if_names).
The section is enabled by default, so the Use name appearance keeps
working out of the box. Disabling if_names removes the additional SNMP
traffic; the name attribute is then no longer populated and the
Use name item appearance is unavailable for the affected hosts. After
changing the setting, the affected hosts need to be rediscovered if the
item appearance is in use.