Werk #22776: keepalived: unparsable virtual address

Component	Checks & agents
Title	keepalived: unparsable virtual address
Date	Oct 16, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p18 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p39 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If keepalived reported a virtual IP address via SNMP that is neither a valid IPv4 nor IPv6 address, all VRRP Instance services of the host crashed with ValueError: ... does not appear to be an IPv4 or IPv6 address.

The services now report the state of their VRRP instance as usual. The unparsable address is shown in the summary together with the raw value received, for example IP Address: cannot parse 0x2342 (expected 4 or 16 bytes).

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