Ccna2 Open Lab

CCNA – Semester2

Semester 2 Open Lab

System parameters • • • • • • •

Configuration register value IOS image Password Recovery Volume of RAM, NVRAM, Flash Status of router interfaces Router tables Discover neighbors

Discover system parameters • How to view the configuration-register and how to change it? • How to find out about system image? How to backup system image? • What is the volume of Flash, NVRAM, RAM? • How to see detail information about interfaces? • How to see all router supported interfaces? • How to find out the attached cable and physical rate? • How to view ARP, HOST, routing table? • How to discover neighbor’s information, what would be the reasons if it does not work?

Router global configuration • • • • • • • •

(config)#hostname (config)#enable secret (config)#service password-encryption (config)#ip host (config)#ip name-server (config)#ip domain-lookup (config)#ip http server (config)#banner motd #...#

Routing and Interface configuration • (conf-if)#clock rate • (conf-if)#encapsulation • (conf-if)#description • • • •

(conf-router)#network (conf-router)#redistribute (conf-router)#timer basic (conf-router)#passive-interface

Routing Scheme • Static routing vs. dynamic routing • Distance-vector routing vs. link-state routing • IP route default vs. ip default-network

SHOW IP ROUTE command

Default Route

Troubleshooting Routing • Check for errors in layer 1, layer 2 then layer 3: – – – – – –

Show ip route Show ip protocol Ping Traceroute Debug ip rip Debug ip igrp transaction

ACL • • • • • •

Standard ACLs vs. extended ACLs Numbered ACLs vs. named ACLs Subnet mask vs. wildcard mask Properly place ACLs on interfaces Properly devide and filter IP ranges Properly control traffic based on type, flow, access direction

Teamwork • Elect a team leader, someone knowledgeable, organized and knows others’ abilities • It is best that members can do everything but it is better to assign the job the the right member. • Organizing is important, the leader must keep others focus, on time and in order • Plan first then execute

Teamwork • Problem of starting maybe time-consuming but can be avoided if organized well. • 1st member draw topology and parameters on the board • 2nd member checks the physical wiring and provide information for 1st member • 3rd member runs the console or ethernet cable (including checking connection, erase old config) • 4th and 5th members deal with IP, IPX scheme and assignment as well as other relating issues

Work Flow

Analyzing Planning Organizing Implemeting Verifying

LAB Topology(5) WS_B

WS_D

Given the IP address range: 190.6.0.0/16 -Assign IP address to all host in the network -Serial connection using clock rate 64k and HDLC encapsulation -Using meaningful banner and description -All access must be authenticated

LAB_B

LAB_A

WS_A

LAB_D

LAB_C

-Be able to telnet to and config all routers using name -Capture config using tftp-server or hyper terminal -Only allow Lab_C to telnet to LAB_B -Do not allow any host except WS_A and WS_B access LAB_C website

LAB_E

WS_C

-Config routing using IGRP with AS number of 200 for Lab B, C, D -Lab A and Lab E use default route only

WS_E

LAB Topology(6) WS_E

WS_D

R_1

WS_F

R_5

R_3

R_2

R_4

WS_A

WS_B

R_6

WS_C

Given the IP address range: 220.10.5.0 Assign IP address to all hosts in the network -Serial connection using clock rate 64k and HDLC encapsulation -Config routing using IGRP with AS number of 90 for R2, R3, R4, R5 -R1 and R6 use default route only -Be able to use name to access other routers -Using meaningful banner and description -All access must be authenticated -Capture config using tftp-server or hyper terminal -Do not allow R1 and R6 Ethernet network to telnet to R_3 -Only allow WS_A and WS_B to access R_4 website