This is the interval in seconds that the age timer
runs. It is used to determine if a sender is still
sending. After one age out interval, the sender is
placed in a dying state and the local switch starts to
listen for traffic from that sender on a specific
destination. If any traffic is received, the sender
if placed back in a non-dying state. If no traffic
is seen before the second age interval, the sender is
considered dead and the corresponding connection tree
for that da/sa connection is removed throughout the
domain. Value will not take effect until blade is reset.