Hello! man page: group group-name Assign the interface to a group. Any interface can be in multiple groups. Cloned interfaces are members of their interface family group by default. For example, a PPP interface such as ppp0 is a member of the PPP interface family group, ppp. My questions: - So what is a group actually? What it does or doesn't do to those interfaces? Is it simply cosmetic? - When I need to (or not) assign something to group? - Are there security implications with group? - Are there performance implications with group?