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:-

333 © 2003, Cisco Systems, Inc. All rights reserved. Chapter 1 Labs 1.1.4Calculating VLSM Subnets Review of Basic Router Configuration with RIP Converting RIP v1 to RIPv Verifying RIP v2 Configuration Troubleshooting RIP v2 using Debug Review of Basic Router Configuration including RIP Converting RIP v1 to RIP v RIP v2 using Debug1.2.6

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 = 2 9 – 2 = 510 possible hosts x.xxxxxxxx =.24.0/23 The next largest subnet requires 200 hosts = 2 8 – 2 = 254 possible hosts xxxxxxxx =.26.0 /24

777 © 2003, Cisco Systems, Inc. All rights reserved. The next largest subnet requires 50 hosts = 2 6 – 2 = 62 possible hosts xxxxxx =.27.0/ 26 The next largest subnet requires 50 hosts = 2 6 – 2 = 62 possible hosts xxxxxx =.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 / / / /24 This block can be summarised as / 22

10 © 2003, Cisco Systems, Inc. All rights reserved. In Binary / / / /22 This allows bits borrowed from the network portion to be given to host addresses