What happens when a new entity joins the network

We will perform a manipulation to illisutrate what happens when an entity joins the network, we will take a trivial case to make it simple. but what is true for the following network is true for any sized network too. We perform the following actions :
vrtr -f gw7-8 : start the gateway GW 7-8
vrtr -f gw76-7 : start the gateway GW 6-7
with VARP , VRIP debugging on, then we have the following output :
From GW 7-8 output :

VARP ( 10297 ) : [ Recieved ] VARP_PRIME  [ 154.45.7.2 , 7 ] 
VARP ( 10297 ) : [ Added ] varp entry  [ 154.45.7.2 , 7 ]
VARP ( 10297 ) : [ SENDING ]  VARP_PRIME_RESPONSE [ 154.45.7.1 , 7 ]
VRIP ( 10566 ) : Addded VRIP Entry [154.45.7.2 , 154.45.7.2 , 1 ]

The following is the interpretation of the output : When the GW 6-7 joins the network the VARP module will send VARP packet to publish the local interface hardware addresses (precisely the interface 154.45.7.2 ). After that, the GW 7-8 will receive this packet through the interface 154.45.7.1 ( because it is connected to the same link) and a new VARP entriy is added as well as a direct route to the interface 154.45.7.2 ( with metric =1 ), this is visible by examining the VRIP output.
The next steps will be starting the three hosts H_8, H_7 and H_6. After staring all the network entities, In the following section we can see these entities settings after the network stabilisation.