[cisco-bba] vpdn retransmit time distribution - explanation

[Tassos Chatzithomaoglou]

I'm trying to figure out what exactly is the following

   Retransmit time distribution: 0 0 27 0 1 0 0 0 0

which comes from the "sh vpdn tunnel all" command.

According to CCO, this should display the number of control channel retransmissions happening over 
time (each value represents exponential backoff from 1 to 8 sec), but i would like a better explanation:

if we have this
   Retransmit time distribution: 0 0 27 0 1 0 0 0 0
and after 5' we have this
   Retransmit time distribution: 0 0 48 0 3 0 0 0 1

how is this translated?

Does the tunnel drop when the sum of all these values reaches the "l2tp tunnel retransmit retries x" 
configured?
How can i clear these counters?

Tassos