CCNA Study Daily Log-Intro toDynamic Routing Protocols

I have access to the Cisco Networking Academy I am following that program. On todays agenda was
Dynamic routing protocols, RIPv1, and, VLSM and CIDR. I will just post my notes with some interesting things in came across and any questions I had. 

urpose of Dynamic Routing Protocols

Discovery of remote networks

Maintain up to date routing info

Choose the best path to destination ntwork

Find  best new route new topoplgy changes

Componets of routing protocol

Data Structure- RPs can use tables and database for thier operation; this info is stored in RAM

Alogrithm- list of steps used to finish a task, RPs use algorithms for routing info and best path determination

RP message-RPs use messages to discover neighboring routers, trade RI, and matain accurte info about netowrk

Advatages over Static routing

Screen clipping taken: 18.04.2011 21:26

Packet tracer notes

R1

Net 192.168.1.0,192.168.10.0

R2

Net 192.168.20.0,192.168.2.0

R3

Net 192.168.1.0,192.168.2.0

IGP and EGP

GPs are used for routing within a routing domain, those networks within the control of a single organization. An autonomous system is commonly comprised of many individual networks belonging to companies, schools, and other institutions. An IGP is used to route within the autonomous system, and also used to route within the individual networks themselves. For example, CENIC operates an autonomous system comprised of California schools, colleges and universities. CENIC uses an IGP to route within its autonomous system in order to interconnect all of these institutions. Each of the educational institutions also uses an IGP of their own choosing to route within its own individual network. The IGP used by each entity provides best path determination within its own routing domains, just as the IGP used by CENIC provides best path routes within the autonomous system itself. IGPs for IP include RIP, IGRP, EIGRP, OSPF, and IS-IS.

Distance Vector and link state

Distance Vector Routing Protocol Operation

Distance vector means that routes are advertised as vectors of distance and direction. Distance is defined in terms of a metric such as hop count and direction is simply the next-hop router or exit interface. Distance vector protocols typically use the Bellman-Ford algorithm for the best path route determination.

In contrast to distance vector routing protocol operation, a router configured with a link-state routing protocol can create a "complete view" or topology of the network by gathering information from all of the other routers

3.2.5 lab

Metrics

A metric is a value used by routing protocols to assign costs to reach remote networks. The metric is used to determine which path is most preferable when there are multiple paths to the same remote network.

Each routing protocol uses its own metric

Load Balaancing

Load balancing is in effect if two or more routes are associated with the same destination.

Eg. R 192.168.6.0/24 [120/1] via 192.168.2.1, 00:00:24, Serial0/0/0

[120/1] via 192.168.4.1, 00:00:26, Serial0/0/1

Administrative Distance

Administrative distance (AD) defines the preference of a routing source

Static routes have a AD of one, when a static route is configured with a exit interface  it is displayed by the show ip route command as directly connected and one would think that the AD of the route is 0, just like all other Directly connected routes but this is not true because it is still a static route and can be seen unsing the show ip route command