1. Network layer Basic routing

3. How to connect different subnets

4. Logical addressing

6. A subnet?

8. Connection through routers

9. Routers and subnets How does packet go from PC A to B?

10. Inside a router

14. Does it correspond to your network settings?

16. IP addresses The IP address for the eth0 interface Broadcast is a reserved address. Used to send to all hosts on subnet Subnet mask is used with IP address to determine the subnet IP range Default route is another word for default gateway. Used when sending to hosts outside the local subnet Primary DNS is the server to ask when translating from exmaple.com to an IP address OSI layers 1 and 2

18. Find the subnet IP range

19. How many IP addresses does it cover

20. DNS server? Default gateway

22. DHCP in action Note the difference between first request and subsequent requests

24. Echo reply

25. Destination host unreachable

26. TTL expired

29. Traceroute google.com

30. Traceroute sde.dk Use wireshark to check requests and responses

34. Simple.

36. Subnet on different device

37. Many subnets makes this important issues

39. RIP (Distance vector)

40. IGP and EGP IGP (using RIP or OSPF) EGP (using BGP)

42. Choose a server an telnet to it

43. “sho ip bgp summary”

44. “sho ip ngp <IP>”