ASNT Labwork

1. ASNT Labwork M Clements ASNT Network Design

2. Introduction • Networking scenario • Network proposal • Network design • Network implementation • Network testing ASNT Network Design

3. asnt.com network • asnt are a young web-based company selling games • They have offices in 4 major cities worldwide • The original network design focussed the network segments and their functions geographically • To avoid having a single point of failure in case of terrorism, cyber attack etc, they have decided to redesign their network • They have been told that a VLAN solution would allow the 4 departments to be distributed globally ASNT Network Design

4. ASNT Network Design

5. Current network • The current network has 4 centres in London, Paris, Rome, New York • The server farm is in London • E-commerce is in New York • Research is in Paris • Marketing is in Rome • If any of the 4 centres were to be targeted, the company would suffer badly ASNT Network Design

6. Server farm - London • Currently has these 4 servers • Public webserver • Intranet webserver • Both webservers have custom pages • DNS server • Contains DNS details for both webservers • TFTP server ASNT Network Design

7. Routing • This is currently RIP version 2 • Routers are fully meshed • The company has been told that migration to OSPF would be a good idea ASNT Network Design

8. Original Design Parameters • asnt has the network range 195.10.8.0 /22 • All departments have a /24 address range • Private addressing is used on all serial links • Telnet is set up on all routers • DHCP server exists on all routers for their attached LAN ASNT Network Design

9. Proposal for new network • Servers are to be distributed globally • Staff and PCs from Paris, Rome and New York are to be distributed to the 4 worldwide locations • The 3 departments and the servers are to exist on separate VLANs • Network is to be upgraded to OSPF ASNT Network Design

10. First Step – Model Original Network • Use A3 paper to design the current network • Include all network and interface details • Decide where the DCE and DTE will reside for each serial link • Decide on clock rate for serial links • Include all names as per slide 4 • There is no need to name the PCs on the LANs • Decide on addressing for the servers – these will not use DHCP ASNT Network Design

11. Serial Link Addressing • Use RFC 1918 addresses • All serial links need /30 addresses • It is good practice to use a set of contiguous addresses • Mark these clearly on your diagram ASNT Network Design

12. FastEthernet (LAN) Interface Addressing • Create 4 /24 networks from the network range 195.10.8.0 /22 • Decide which of the 4 city routers will have each of the address ranges • Choose an appropriate address for the FastEthernet interface for each router • Mark these addresses on your diagram ASNT Network Design

13. Completing the design Do not continue until your paper design is complete ASNT Network Design

14. Open Packet Tracer 5.x You must use Packet tracer 5.x for this network design Please ask if you need a copy ASNT Network Design

15. Implementation Steps • Use 4 x 2811 routers • You will need to add at least 3 serial interfaces to each router • It may be easier to create one router with the serial interfaces then use copy and paste to duplicate it 3 times • You decide . . . . . • Do not add any other hardware yet ASNT Network Design

16. Naming the routers • Give each router the name that you have decided upon Router(config)#hostname Rome Rome(config)# • Make sure the the router’s name also appears on the PT4 working area – this is in the ‘Config’ tab of the router ASNT Network Design

17. Add Serial Interface Links • Use the ‘Connections’ feature in Packet Tracer • Create the serial links as you have indicated in your diagram • Be sure to put the DCE interfaces where your diagram has shown • Make a fully meshed network • Only begin to add addresses once you have finished placing the serial links ASNT Network Design

18. Serial Addressing • Make sure that you know the names of all serial interfaces and that they are the same as you have shown on your diagram Router#show ip interface brief is the command to show the interface names • Add the 12 serial interface addresses • Remember to turn the interfaces on Router(config-if)#no shutdown ASNT Network Design

19. Serial link verification • When all serial links are numbered correctly the indicators will turn from red to green If any links remain red, check your addressing and link assignments ASNT Network Design

20. Check connectivity Router#sh ip int brief Interface IP-Address OK? Method Status Protocol FastEthernet0/0 unassigned YES manual administratively down down FastEthernet0/1 unassigned YES manual administratively down down Serial0/0/0 1.1.1.2 YES manual up up Serial0/0/1 1.2.2.1 YES manual up up Etc. etc. • All 3 serial interfaces should appear as Status up, Protocol up ASNT Network Design

21. SAVE YOUR WORK! • Remember to save your configurations on each router and also the entire network within Packet Tracer • I will have no sympathy if you do not save and your PC crashes ASNT Network Design

22. Do not continue until you have established connectivity across all serial links ASNT Network Design

23. Adding LAN interface addresses • Use the fa0/0 interface on each router • Add the addresses that you have already created on your diagram • Remember to turn the interfaces on • Check using Rome#sh ip int brief • They should both appear as up, up • Troubleshoot as necessary ASNT Network Design

24. Routing Protocol • For each router, add RIP version 2 and enter all connected networks – not interfaces Rome#conf t Enter configuration commands, one per line. End with CNTL/Z. Rome(config)#router rip Rome(config-router)#version 2 Rome(config-router)#network 172.16.10.0 Rome(config-router)#network 192.168.1.0 Rome(config-router)#etc etc ASNT Network Design

25. Verify routing Rome#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B – BGP, D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, E – EGP, i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route • Below here you should be able to see all RIP reported networks – troubleshoot if they do not appear ASNT Network Design

26. Do not continue until you have established that the routing is working properly ASNT Network Design

27. Add DHCP to each router • Decide on a name for the 4 address pools that DHCP will use to allocate addresses for each LAN Use YOUR OWN IP details here: Rome(config)#ip dhcp pool marketing Rome(dhcp-config)#default-router 1.2.3.4 Rome(dhcp-config)#dns-server 4.5.6.7 Rome(dhcp-config)#network 1.2.3.0 255.255.255.0 Rome(dhcp-config)#exit ASNT Network Design

28. SAVE YOUR WORK! • Remember to save your configurations on each router and also the entire network within Packet Tracer • I will have no sympathy if you do not save and your PC crashes ASNT Network Design

29. Add 2960 switches • Add 4 x 2960 switches • Name them appropriately • Connect using the ‘Copper Straight-through’ • Be sure to connect to the fa0/0 interface of the router • Connect to the fa0/24 of each switch ASNT Network Design

30. Add PCs to switches • Add 6 PCs to each switch except for the London switch • Add only one PC to the London switch • Connect the PCs to the switches using the lowest available port • Use the ‘Copper Straight-through’ connector • Enable DHCP for each PC in the Desktop, IP Configuration window • Wait until all 4 fields are filled • Troubleshoot if DHCP fails ASNT Network Design

31. SAVE YOUR WORK! • Remember to save your configurations on each router and also the entire network within Packet Tracer • I will have no sympathy if you do not save and your PC crashes ASNT Network Design

32. Do not continue until you have established that DHCP is working properly ASNT Network Design

33. Adding Servers • Add 4 servers (server-PT) to the London LAN • Attach to the switch with the ‘Copper Straight-through’ connector • Name the servers as to their individual functions – see slide 4 • Enter the configuration of each router and turn off all services EXCEPT the one required (name of server) • Add your IP addresses and default gateway to each server ASNT Network Design

34. Configuring Web Servers • In the HTTP configuration of the intranet and public webservers, change the HTML a little so it is easy to see where you have connected • The webserver will accept simple text only – no hyperlinks or diagrams ASNT Network Design

35. Configuring DNS server • In the DNS server, add two URLs to the DNS listing so that the URLs are mapped to the correct IP addresses for the two web servers ASNT Network Design

36. Network Testing • Ensure that each PC can reach the two webservers via their url • Use Desktop, Web browser • If this fails, try the IP address instead • If this fails, try to ping your local router interface • Troubleshoot as necessary ASNT Network Design

37. Adding value to your network • Map host names to IP addresses for each router ip host Rome 1.2.3.4 192.168.1.2 172.16.22.5 • The ip host will accept up to 3 addresses for each router • You will need to add 3 router hostnames to each router ASNT Network Design

38. Setup TELNET • Use the following for each router Router(config)#line vty 0 4 Router(config-line)#password cisco Router(config-line)#login Router(config-line)#exit ASNT Network Design

39. Setup passwords • Use the following to setup an encrypted password of class on each router Router(config)#enable secret class • Be sure to save your configuration on each router often ASNT Network Design

40. SAVE YOUR WORK! • Remember to save your configurations on each router and also the entire network within Packet Tracer • I will have no sympathy if you do not save and your PC crashes ASNT Network Design

41. Network testing • Check that you can ping all points of the network from PCs • Carry out tracert from the PCs to webservers • Try to establish a TELNET session to another router by typing its name only at the Priv Exec prompt ASNT Network Design

42. Troubleshooting • If you have a failure of any of these tasks, try to work out a plan to diagnose the problem • Ask your lecturer to help if you have no luck • Remember that most problems will be due to badly typed commands, IP addresses and other parameters • This means YOU MUST BE ACCURATE ASNT Network Design

43. Upgrade Analysis • Now you should begin to analyse your network for the planned upgrade • Draw up a plan for VLANs and where the users and servers will eventually be • Consider the addressing issues involved with setting up VLANs • Be sure to bring your diagrams and thoughts next week ASNT Network Design

44. Summary • You have created the start network • You have a careful design on paper • You have added services to the network • You have tested the network • You have begun troubleshooting • You have started thinking about the network upgrade ASNT Network Design