CSE 123 Lecture Notes - Lecture 15: Routing Information Protocol, Routing Protocol, Enhanced Interior Gateway Routing Protocol
2 Nov 2018
School
Department
Course
Professor
Document Summary
Note: these do not work all the time. Never advertise a destination through its next hop. Tell some neighbors one thing, tell others another. Poison reverse: seng negative info when advertising a destination through its next hop. Some neighbors you say i cannot get there . Limtiation: only works for loop s of size 2. Only for the destinations for which you are using. Only one link between a and d . if the link breaks, we"re toast! Tells c that d is unreachable (poison reverse) Tells a it has path of cost 3 (split horizon doesn"t apply) A tells c that d is now reachable! Distance vector where edges are unit costs. Weak at adapting to changes out of the box! (loops and count to infinity) At school: large organization large service providers. At home: consumer isp backbone service provider (verizon, sprint, at&t, etc. ) Connect through peering points : very large buildings full of routers (they peer )
