IP address lookup for Internet routers using cache routing table
Houassi Hichem, Bilami Azeddine · 2010
So that the routers forward an IP packet with his destination, they are running a forwarding decision on an incoming packet to determine the packet’s next-hop router. This is achieved by looking up the longest matching prefix with a packet destination address in the routing tables. Therefore, one major factor in the overall performance of a router is the speed of the IP address lookup operation due to the increase in routing table size, in this paper, a new IP address lookup algorithm based on cache routing-table is proposed, that contains recently used IP addresses and their forwarding information to speed up the IP address lookups operation in the routers. We evaluated the performance of our proposed algorithm in terms of consultation time for several sets of IP addresses, the results of performance evaluation show that our algorithm is efficient in terms of the lookup speed since search can be immediately finished when the input IP address is found in the cache routing table.