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ServerBackup
ETS10.251.128.159
WAN
ServerPrimarySchool
10.x.192.9
All IPs used in the Static Ranges
10.x.192.1-193.255
Wire10.x.192.1 199.254
Wireless10.x.176.1 192.254
Look Up LAN running 24 hoursSearching every hour for new IP
addresses
Posts to a server and uploaded into a Filemaker Pro database that is web enabled
Scopes Currently Not Established
Schools
ServerBackup
ETS10.251.128.159 WAN
ServerPrimary
KCW10.202.0.9
All IPs used on all floorsOf KCW in the Static Ranges
10.x.0.1-255
Floor 14
Floor 1
Wireless
Look Up Lan running 24 hoursSearching every hour for new IP
addresses
Posts to a server and uploaded into a filemakerpro database that is web enabled
KCW
DHCP BasicsDHCP BasicsOverview
•What is DHCP?•Why use it?•How does it work?
What is DHCP?
DHCP allows a host to learn its configuration parameters from a server. It automates IP configuration, making it much easier to connect to a network. It allows re-use of IP addresses.
Why use DHCP?•Visitor convenience•Speeds setup of new machines•Simplifies conference room connections•Allows roaming laptops•Centralizes IP management
DHCP BasicsDHCP BasicsHow does DHCP work?1. Server discovery
• Client DHCPDISCOVER packet asking “Who can give me DHCP information?” Hello
2. Servers make an offer• All servers on the subnet unicast a DHCPOFFER packet saying “I can supply you with
DHCP information, if you like.” What Do You need
3. Client requests•The client selects one of the responses, and broadcasts a DHCPREQUEST packet saying
“I choose server XYZ. Server XYZ, here’s my MAC address, what’s my IP address?” Give Me An Address•The unchosen servers treat this as a rejection.•The request can specify a preferred IP address, if the client has a preference.•The request can ask for additional information.
4. Server responds Here It is and for How long•The server responds with a DHCPACK packet saying “Here is your IP address. It’s good for 24 hours.”•The response can contain additional information, if the client asked for it.•The server records that the IP address is in use.
5. Client releases You Can Have it Back•The client finishes it’s work, and send a DHCPRELEASE packet saying “I’m done with the IP address.”•The server records that the IP address is not in use.
DHCP BasicsDHCP Basics
Clients refresh leases• When half the lease time has expired, a client broadcasts another DHCPREQUEST packet saying “I choose server XYZ. Server XYZ, I want IP address N. Can I have it?”. The server responds yes or no.
Servers can refuse• If a server can’t supply an unused IP address, or if the server can’t supply an IP address that matches the client’s MAC address, the server sends a DHCPNAK packet saying “you can’t have an IP address”. The client is then free to make another request.
Clients preserve addresses• A client can remember its last-used IP address in non-volatile memory. When it boots, it can request the address from the server. This improves the chances that a client will retain the same IP address over long periods of time.
DHCP BasicsDHCP Basics
What DHCP can provide•IP address and lease time•subnet mask•default route•DNS, NIS, LPR, NTP, logging server(s)•WINS NBNS node type•More
Static vs. dynamic addresses•DHCP servers manage two kinds of IP addresses:
o Static IP addresses, which the server gives to clients based on the client’s MAC addresso Dynamic IP addresses, which the server gives to clients as requested. These come from a “pool” of addresses in a subnet, set aside for this purpose
Network ParametersIP AddressTracking Management
Exclusion Area
Scope sizeLease Times
Reservations
DHCP Wireless Clients (1020 Addresses)
Reserved Network Equipment (255 Addresses)
Elementary/Middle/High Primary Wired VLAN:Elementary/Middle/High Primary Wired VLAN:10.x.192.1 10.x.128.1 10.x.193.255 10.x.129.255
10.x.194.1 10.x.130.1 10.x.198.255 10.x.134.255
10.x.199.1 10.x.135.1 10.x.199.254 10.x.135.254
Elementary/Middle/High Primary Wireless (176) VLAN: Elementary/Middle/High Primary Wireless (176) VLAN: 10.x.176.1 10.x.112.110.x.176.255 10.x.112.255
10.x.177.1 10.x.113.110.x.188.255 10.x.125.255
10.x.189.1 10.x.126.110.x.191.254 10.x.127.254
Backup DHCP Server (764 Addresses)
Static Printers and Servers (255Addresses)
DHCP Wired Clients (3060 Addresses)
SBBC Dynamic Host Control Protocol (DHCP) Network Standard
Gateway 10.x.192.1-2 10.x.128.1-2Server range 10.x.192.1-20 10.x.128.1-20Printers:10.x.192.21-193.255 10.x.128.21-129.255 (510 Addresses)
44 Floor 1 Floor 1
Backup DHCP Server (255 Addresses)
Static Printers and Servers (255Addresses)
DHCP Wired Clients (1275 Addresses)
10.201.0.310.201.0.255
10.201.1.010.201.5.255
10.201.6.010.201.6.255
10.201.7.010.201.7.254
Network Equipment Range (254 Addresses)
55 Floor 2Floor 2
10.202.0.310.202.0.255
10.202.1.010.202.5.255
10.202.6.010.202.6.255
10.202.7.010.202.7.254
66 Floor 3 Floor 3
10.203.0.310.203.0.255
10.203.1.010.203.5.255
10.203.6.010.203.6.255
10.203.7.010.2037.254
77 Floor 4 Floor 4
10.204.0.310.204.0.255
10.204.1.010.204.5.255
10.204.6.010.204.6.255
10.204.7.010.204.7.254
22 Floor 5 Floor 5
10.205.0.310.205.0.255
10.205.1.010.201.5.255
10.205.6.010.205.6.255
10.205.7.010.205.7.254
8 8 Floor 6Floor 6
Backup DHCP Server (255 Addresses)
Static Printers and Servers (255Addresses)
DHCP Wired Clients (1275 Addresses)
10.206.0.310.206.0.255
10.206.1.010.206.5.255
10.206.6.010.206.6.255
10.206.7.010.206.7.254
Network Equipment Range (254 Addresses)
99 Floor 7 Floor 7
10.207.0.310.207.0.255
10.207.1.010.207.5.255
10.207.6.010.207.6.255
10.207.7.010.207.7.254
33 Floor 8 Floor 8
10.208.0.310.208.0.255
10.208.1.010.208.5.255
10.208.6.010.208.6.255
10.208.7.010.208.7.254
1010 Floor 9 Floor 9
10.209.0.310.209.0.255
10.209.1.010.209.5.255
10.209.6.010.209.6.255
10.209.7.010.209.7.254
1414 Floor 10Floor 10
10.210.0.310.210.0.255
10.210.1.010.210.5.255
10.210.6.010.210.6.255
10.210.7.010.210.7.254
1111 Floor 11 Floor 11
Backup DHCP Server (255 Addresses)
Static Printers and Servers (255Addresses)
10.211.0.310.211.0.255
10.21.1.010.211.5.255
10.211.6.010.211.6.255
10.211.7.010.211.7.254
Network Equipment Range (254 Addresses)
12 12 Floor 12Floor 1210.212.0.310.212.0.255
10.212.1.010.212.5.255
10.212.6.010.212.6.255
10.212.7.010.212.7.254
1313 Floor 13 Floor 1310.213.0.310.213.0.255
10.213.1.010.213.5.255
10.213.6.010.213.6.255
10.213.7.010.213.7.254
11 Floor 14 Floor 1410.214.0.310.214.0.255
10.214.1.010.214.5.255
10.214.6.010.214.6.255
10.214.7.010.214.7.254
WirelessWireless10.215.0.310.215.0.255
10.215.1.010.215.5.255
10.215.6.010.215.6.255
10.215.7.010.215.7.254
VOIPVOIP10.216.0.310.216.0.255
10.216.1.010.216.5.255
10.216.6.010.216.6.255
10.216.7.010.216.7.254
DHCP Wired Clients (1275 Addresses)
DHCP Server IP Addresses
Primary room 202 CER:10.202.0.9
Backup a ETS:10.252.128.159
These are IP addresses that have been pinged at one time. An Available IP address is one that does not show up in the Database example: 10.25.192.24
DHCP BasicsDHCP BasicsReservations
Enter the printer information as shown. Use the Mac address from the printer and type in the ip address of the printer
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