问题:
How bgp synchronization affected the route to 172.2.0.0/24 ?
正解:if we use BGP synchronization, Router A will not send 172.2.0.0 to Router B ,if it did not learn this prefix via igp. so RouterB don ' t know to 172.2.0.0 ,so Router C don ’ t know too .
Whatis the BGP synchronization ?
Before a route learned ** an IBGP neighbor is installed into the IP routing table or is advertised toa BGP peer, the route must first be known via IGP.