Checkmk Werk 10838: lnx_if: Fix grouping of interfaces on clusters

ID: 10838 Title: lnx_if: Fix grouping of interfaces on clusters Component: Checks & agents Level: 1 Class: Bug fix Version: 1.7.0i1 On clusters a check plugin processes all node data at once. Interfaces may be grouped by index. The check plugin {{lnx_if}} serially numbered the interface indices across all node data. This led to missing interfaces in a group. Now the check plugin serially numbers the interface indices PER node.