I found this topic to be related to my question about BGP Advertisement that I have. I am some what confused about BGP Route Advertisment condition in general.
The rule indicates that "BGP Best Route" From BGP Table will be advertised to "BGP Peer neighbor" if the route already exists within IGP Table (routing-Table). In that case, we can use "Network" Statement to advertise BGP Route to BGP Peer.
Also, Another Rule indicates that "BGP BEST ROUTE" will get installed in Routing-Table after It has been selected as Best BGP Route. The question is that if The route should already exists inside of routing-table before we can advertise BGP Route via Network Statement, Why This also talks about that when BGP Best Route gets selected, BGP Best Route will get advertised to Routing-table. Per the first Criteria, my assumption is that BGP Best Route already existed inside of Routing-table other wise, That route would not have got selected to be advertised to BGP Peer or to get installed into Routing-table.
Are going through Loop here as far as the conditions. I understand that BGP Best Route will get advertised to BGP Peer neighbor IF THE ROUTE Already exists inside of Routing-table as well as BGP Best Route will get installed in to Routing-table.
My interpretation from above rules is that BGP Best Route already exists inside of routing-table. Otherwise, it would not have got selected to be advertised to BGP neighbor via Network statement. In that case, the second condition may be is not necessary by saying that BGP Best route will also get advertised to Routing-table because it was already there?
Thank you for your time in advance.