Description: The current state of snapshot routing for this entry. active means that routing information may be exchanged. quiet, only present on a client snapshot interface, means that routes are frozen, and that no routing information may be exchanged until the active state is reentered. serverPostActive, only present on a server snapshot interface, means that the active period has expired, but routing information will still be accepted from (but not sent to) the associated client router. transitionToQuiet, and transitionToActive, only present on a client, are temporary states entered after the active state, wherein any down to up transition of the interface will cause a move to the quiet or active state, respectively. limbo is a temporary state for activity blocks that are in the process of being created or destroyed.