111© 2003, Cisco Systems, Inc. All rights reserved.

Cisco Feedback is Essential:-

• Ca2dts has not completed Course Feedback

• ca5dpa has not completed Course Feedback

• ellent has not completed Course Feedback

• wredhouse has not completed Course Feedback

222© 2003, Cisco Systems, Inc. All rights reserved.

University Feedback:-

• http://osiris.sunderland.ac.uk/

333© 2003, Cisco Systems, Inc. All rights reserved.

Chapter 1 Labs

• 1.1.4Calculating VLSM Subnets

• 1.2.3Review of Basic Router Configuration with RIP

• 1.2.4Converting RIP v1 to RIPv2

• 1.2.5Verifying RIP v2 Configuration

• 1.2.6Troubleshooting RIP v2 using Debug

• 1.2.3Review of Basic Router Configuration including RIP

• 1.2.4Converting RIP v1 to RIP v2

• 1.2.6RIP v2 using Debug

444© 2003, Cisco Systems, Inc. All rights reserved.

RECAP

• VLSM and CIDR

555© 2003, Cisco Systems, Inc. All rights reserved.

VLSM Labs

666© 2003, Cisco Systems, Inc. All rights reserved.

• The largest subnet requires 400 hosts = 29

– 2 = 510 possible hosts

• 192.168.0001100x.xxxxxxxx = .24.0/23

• The next largest subnet requires 200 hosts = 2 8 – 2 = 254 possible hosts

• 192.168.00011010.xxxxxxxx = .26.0 /24

777© 2003, Cisco Systems, Inc. All rights reserved.

• The next largest subnet requires 50 hosts = 26 – 2 = 62 possible hosts

• 192.168.00011011.00xxxxxx = .27.0/ 26

• The next largest subnet requires 50 hosts = 26 – 2 = 62 possible hosts

• 192.168.00011011.01xxxxxx = .27.64/ 26

888© 2003, Cisco Systems, Inc. All rights reserved.

CIDR / Supernetting Example

• Company A requires 945 IP addresses

• Using the old system it can be assigned either a Class B address or 4 Class C address

• This would generate 4 entries in the ISP routing table

999© 2003, Cisco Systems, Inc. All rights reserved.

• Using CIDR the ISP is able to use four consecutive IP address

• 200.10.0.0 / 24

• 200.10.1.0 / 24

• 200.10.2.0 / 24

• 200.10.3.0 /24

• This block can be summarised as 200.10.0.0/ 22

101010© 2003, Cisco Systems, Inc. All rights reserved.

In Binary

• 200.10.00000000.0 / 22

• 200.10.00000001.0 / 22

• 200.10.00000010.0 / 22

• 200.10.00000011.0 /22

• This allows bits borrowed from the network portion to be given to host addresses