Device ConfigurationAdvanced Setup – Dynamic Routing (OSPF) 97BEC 6500 Series User ManualDynamic RoutingThe NAT (Network Address Translation) feature transforms a private IP into a public IP, allowingmultiple users to access the internet through a single IP account, sharing the single IP address. NATbreak the originally envisioned model of IP end-to-end connectivity across the internet so NAT cancause problems where IPSec/ PPTP encryption is applied or some application layer protocols such asSIP phones are located behind a NAT. And NAT makes it difficult for systems behind a NAT to acceptincoming communications.❖ Open Shortest Path First (OSPF)OSPF: Enable to activate OSPF routing.Rule Index: The numeric route indicator. The maximum entry is up to 10, ranging from 0 to 9.Interface: Set the interface which runs the OSPF process (involved in OSPF routing). It can be WANinterfaces or established GRE tunnels.Area ID: The OSPF area identifier. It is a decimal number in the range of 0-4294967295. Enter thearea ID in which the interface belongs to. The area with area-id=”0” is the backbone area.If the router has networks in more than one area, then an area with area-id=”0” (the backbone) mustalways be present. All other areas are connected to it. The backbone is responsible for distributingrouting information between non-backbone areas. The backbone must be contiguous, i.e. there mustbe no disconnected segments. However, area border routers do not need to be physically connectedto the backbone - connection to it may be simulated using a virtual link.
