dhcp scopes internetworking, tcp ip

1. SCOPES OF DYNAMIC HOST CONFIGURATION PROTOCOL

3. Scopes determine which IP addresses are provided to the clients. Scopes should be defined and activated before DHCP clients use the DHCP server for its dynamic IP configuration. You can configure as many scopes on a DHCP server as is required in your network environment. Scopes…

5. A DHCP scope consists of a pool of IP addresses on a subnetwork, such as 10.223.223.1 to 10.223.223.200, that the DHCP server can lease to DHCP clients. Each physical network can have only one DHCP scope or a superscope with one or more ranges of IP addresses. DHCP Scope and Subnet …

12. DHCP Scope Properties Network ID : The network ID for the range of IP addresses . Subnet mask : The subnet mask for the network ID Network IP address range : The range of IP addresses that are available.

13. Lease duration : The period of time that the DHCP server holds a leased IP address for a client before removing the lease. Router A DHCP option that allows DHCP clients to access remote networks. DHCP Scope Properties …..

14. DHCP Scope Properties ….. Scope name : An alphanumeric identifier for administrative purposes. Exclusion range : The range of IP addresses in the scope that is excluded from being leased.

16. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

17. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.47 180.130.54.45 Here the black computer wants to register itself on the network. So it sends a request packet to the dhcp server requesting an IP address

18. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

19. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

20. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

21. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 It broadcasts DHCPDISCOVER msg over local network with dest address 255.255.255.255

22. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

23. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

24. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

25. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

26. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

27. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

28. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 The packet contains MAC address, source port, dest ip address, port,and transaction id.

29. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Each network has a relay agent or dhcp server The req recievd from the black system is processed by dhcp server or agent. Others ignore it.

30. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Relay agents r configured wit the ip address of dhcp server

31. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Agent will forward the msg from black computer to dhcp server

32. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

33. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

34. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

35. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Dhcp contains a pool of ip addresses that can be leased to hosts on demand

36. DHCP server Ip address pool Various scopes

37. DHCP server Ip address pool Various scopes To subnet 1 To subnet x

38. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Server sends ip address, default gateway, subnet mask

39. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45

40. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Dhcp ip address Client’s MAC, new ip addrss and information.

41. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Relay agent pass the msg from server to the black computer

42. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 Now the client has a new ip adress. It has to renew it time to time. 160.50.50.4

43. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 160.50.50.4

44. DHCP SERVER RELAY AGENT 160.50.50.1 160.50.50.2 160.50.50.3 Switch 180.130.54.45 180.130.54.45 160.50.50.4

46. scope

48. Administrator plans the Scopes based on the needs of particular groups of users, with appropriate lease durations defined for the related scopes. Scope and Administrator…

51. DHCP scopes makes all the clients happy .

52. THANK YOU