Werk #17740: cisco_vpn_tunnel: Skip tunnels without phase 1

Component	Checks & agents
Title	cisco_vpn_tunnel: Skip tunnels without phase 1
Date	May 5, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p32 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Previously, the check plug-in cisco_vpn_tunnel would crash with the exception:

ValueError: could not convert string to float: ''

This occurred if a tunnel did not report any values for phase 1. With this Werk, these tunnels are skipped.

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