thanks for that useful advice - i found it Release NOoes and CLI / EDM Admin Guide.
Enter the show command followed by the pipe (|) character, followed by the GREP filter command. The show command output contains only the lines that match the GREP filter pattern. This is available for VSP7200.
I need it for VSP8600 too. Do you know if the upcoming VOSS 6.2 (for VSP8600) also include this new feature ?