Configuration field to hold BGP restart mode and timer.
If mode is DISABLE, then graceful restart and helper modes are disabled. If mode is GR_AND_HELPER, then both graceful restart and helper modes are enabled. If mode is HELPER_ONLY, then helper mode is enabled. HELPER_ONLY mode is the ability for a BGP speaker to indicate its ability to preserve forwarding state during BGP restart. GRACEFUL_RESTART mode is the ability of a BGP speaker to advertise its restart to its peers.
Configuration field to hold BGP restart timers.