ccna 2 summary

Hoofdstuk 1:

1.1.4

4 major phases tot the boot up process:

1. Performing the POST: Power on Self‐Test
2. Loading the bootstrap program: Locate Cisco IOS and load it into RAM
3. Locating and loading the Cisco IOS software: from flash memory or TFTP otherwise empty
IOS from ROM
4. Locating and loading the start‐up configuration file or entering setup mode

Show version: command can be used to help verify and troubleshoot some of the basic hardware
and software components of the router.

Show running‐config

1.1.6

Routers operate at Layers 1, 2 and 3




1.2.2 Basic router configuration:

Router(config)#hostname R1
Router(config)# enable secret password
Router(config)# line console 0
Router(config‐line)#password password
Router(config‐line)#login
Router(config)#line vty 0 4
Router(config‐line)#password password
Router(config‐line)#login
Router(config)#banner motd # message #

Router(config)# interface type number
Router(config‐if)# ip address address mask
Router(config‐if)#description description
Router(config‐if)#no shutdown
Router#copy running‐config startup‐config
Router#show running‐config
Router#show ip route
Router#Show ip interface brief
Router#show interfaces

, 1.3.1 introducing the routing table

A routing table is a data file in RAM that is used to store route information about directly connected
and remote networks.

Directly connected routes: routes in the same network
Static routes: are routes to networks that has manually configerd routes.
Dynamic routing protocol: automated learned routes to remote networks

Router# show ip route
C:\route print

1.3.3 static routing

When to use static routes:
1. A network consists of only a few routers
2. A network is connected to the internet only through a single isp.
3. A large network is configured in a hub‐and‐spoke topology

1.3.4 Dunamic routing

Ip routing protocols:
 RIP(routing information protocol)
 IGRP(interior gateway routing protocol)
 EIGRP(Enhanced interior gateway routing protocol)
 OSPF(Open Shortest Path First)
 IS‐IS(Intermediate system‐to‐intermediate system)
 BGP(border gateway protocol)

1.4.2 Best path and Metric
 Hop count: is the number of routers (RIP)
 Bandwidth: determines the best path based on bandwith(ospf)

1.4.3 Equel cost Load Balancing
 EIGRP