Transcript ROUTING PROTOCOL IGRP

ROUTING PROTOCOL IGRP
REVIEW
 Purpose of Router
– determine best path to destination
– pass the frames to the destination
 Protocols
– routed - used by hosts, can be directed or routed
– routing -used by routers, directs routed data to
the destination
– examples - RIP, IGRP
PATH DETERMINATION
 Determine path for data to be delivered to
the destination
– strip off data link frame to examine packet
– reads destination address of packet
 Routing Table
– contains routes to various networks
– contains metrics for each route
– default next hop
CONTINUED
 Use metrics to compare routes
– hop count
– bandwidth
– delay
– cost
– load
– ticks
– reliability
ADDRESSING
 Passing frames to the destination through
routers
– IP address of source and destination maintained
– MAC address of next hop is used to reframe
data packet
– At destination network router destination host
MAC address is used to reframe data packet
REVIEW
 What is the difference between routed and
routing protocols?
 What is a metric?
 What MAC address is used when passing
data between routers?
 What address remains constant through the
routing process?