Check_MK Werk 2730: if64: Grouping of interfaces resulted in an exception

ID: 2730 Title: if64: Grouping of interfaces resulted in an exception Component: Checks & Agents Level: 1 Class: Bug Fix Version: 1.2.7i4 The grouping of interfaces which are checked with the if64 check was broken. This has been fixed now. Grouping of interfaces across cluster nodes is undefined behaviour. Added an error message to inform the users in case they configured grouping for clustered interfaces.