This bitmask indicates optional session values for
this tunnel. The following describes these
fastRerouteThis flag indicates that the any tunnel
hop may choose to reroute this tunnel without
tearing it down. This flag permits transit routers
to use a local repair mechanism which may result in
violation of the explicit routing of this tunnel.
When a fault is detected on an adjacent downstream
link or node, a transit router can reroute traffic
for fast service restoration.
mergingPermitted This flag permits transit routers
to merge this session with other RSVP sessions for
the purpose of reducing resource overhead on
downstream transit routers, thereby providing
better network scalability.
isPersistent Indicates whether this tunnel should
be restored automatically after a failure occurs.
isPinned This flag indicates whether the loose-
routed hops of this tunnel are to be pinned.
recordRouteThis flag indicates whether or not the
signaling protocol should remember the tunnel path
after it has been signaled.