TUGAS ROUTING

Routing, BGP
Overview
•Kent MAN router interconnect
•Routing Tutorial
•Routing Protocols used within Kent MAN

Kent MAN Interconnect
•ATM LANE to ATM PVC’s
•Remote sites: Radio links to Short Haul data circuits
•ATM 155Mbps to Gigabit Ethernet Backbone –BT wavestreamcircuits

Routing Tutorial
What does the router do?
Router finds a path and forwards the
packet:
–Routing: building maps and giving directions
–Forwarding: moves packets between interfaces

Path choice and Forwarding
•Finding the Path
–The path is derived from information received from a routing protocol
–If several paths exist the best next hop is stored in the forwarding table
–Decisions are updated periodically or as a topology change occurs
•Forwarding
–Based on destination forwarding
–Longest match forwarding
More specific prefix preferred over less specific