2005 Spring CS492 Lab #4

2005.11.1. Tuesday 10:30am-NoonBuilding E3-1, Classroom #3

Dept of EECS, Div. of CS

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Goals and Overview of Lab #4

• Goals– To introduce students to Ad-hoc and AODV routing protocol

• Overview1. Make Ad-hoc network

- make laptop ad-hoc mode

2. Communicate other laptops with AODV routing protocol– Test ‘ping’– Transfer files to other laptops

• Preparation for Lab #4– Install kernel v2.4.20-8– Install a Wireless lan driver– Install a AODV driver

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Lab #4: Step 2

device 10

device 7

device 5

device 2

CS492A(192.168.11.1 ~ 4)

CS492B(192.168.100.5~ 9)

device 1

device 3

device 4device 6

device 8

device 9

• Configure Ad hoc network

xx xx

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Lab #4: Step 1

• Configure Ad hoc network– Ad-hoc server ?#./RT2500-Linux-STA-1.4.6.2/Utility/Raconfig2500

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Lab #4: Step 1

• Configure Ad hoc network– Ad-hoc client ?#./RT2500-Linux-STA-1.4.6.2/Utility/Raconfig2500

vv

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Lab #4: Step 2

• IP configuration

1) #setup• Edit Network Configuration

IP: 192.168.11.1~4 (Group A) 192.168.100.5~9 (Group B)Netmask:255.255.255.0Default Gateway(IP): 192.168.11.254Primary Nameserver: 192.168.11.1

2) #vi /etc/sysconfig/network-scripts/ifcfg-eth0 (check network configuration)

3) #cp ifcfg-eth0 ./ifcfg-ra0

4) #vi ifcfg-ra0DEVICE=ra0 (<-edit)

5) #setup - Edit Network Configuration

DHCP 설정으로 바꾸고 저장

6) #vi /etc/sysconfig/network-scripts/ifcfg-eth0 (check DHCP)

7) #/etc/init.d/network restart

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Lab #4: Step 3

• Mac-filterling

– block getting the frame which has source mac address xx:xx:xx:xx:xx:xx.

– That is, a node can’ t communicate directly with source mac address xx:xx:xx:xx:xx:xx, but can through other nodes with AODV

1) #iptables –A INPUT –m mac –mac-source xx:xx:xx:xx:xx:xx –j DROP

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Lab #4

Scenario 1- test ‘ping’-

After blocking ping source A to destination BAfter blocking ping source A to destination B

directly by using iptables,directly by using iptables, We can ping source A to B throughWe can ping source A to B throughOther nodes by using Other nodes by using AODVAODV..

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Lab #4: Scenario 1

• Test ‘ping’ with AODV

#ifconfig - check wireless lan, ip configuration, ra0

#~/Utility/Raconfig2500 - check same channel and ssid in each group

#iptables –L - check blocking mac address

#ping 192.168.xxx.xxx - check whether ping is working or not

#aodvd –d –l –r 3 - run AODV daemon

#ps –aux - check whether AODV is working

#ping 192.168.xxx.xxx - check again whether ping is working or not

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Lab #4

Scenario 2- Transfer Files -

We can experience how to transmit files through We can experience how to transmit files through other nodes with other nodes with AODVAODV routing protocol. routing protocol.

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Lab #4: Scenario 2

• Transfer files with AODV routing protocol(file in /var/ftp/pub)

#ftp 192.168.11.4 or 192.168.100.9 ftp username>anonymous password> get sample (sample file 을 받는다 .)

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Lab #4: Wrap Up

• Questions to ask yourself– What is Ad-hoc network?– How AODV routing protocol works?