DHCP Training

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DHCP Training
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Schools
Scopes Currently Not Established
WAN
Wireless 10.x.176.1 192.254
Server Backup ETS 10.251.128.159
Server Primary School 10.x.192.9
Wire 10.x.192.1 199.254
Look Up LAN running 24 hours Searching every hour
for new IP addresses
All IPs used in the Static Ranges 10.x.192.1-193.2
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Posts to a server and uploaded into a Filemaker
Pro database that is web enabled
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KCW
Server Backup ETS 10.251.128.159
WAN
Wireless
Floor 14
Server Primary KCW 10.202.0.9
Floor 1
Look Up Lan running 24 hours Searching every hour
for new IP addresses
All IPs used on all floors Of KCW in the Static
Ranges 10.x.0.1-255
Posts to a server and uploaded into a
filemakerpro database that is web enabled
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Primary
Backup
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DHCP Basics

• Overview
• 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

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DHCP Basics

• How 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, heres my MAC address,
  whats 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. Its 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 its work, and send a
  DHCPRELEASE packet saying Im done with the IP
  address.

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DHCP 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 cant supply an unused IP address,
  or if the server cant supply an IP address that
  matches the clients MAC address, the server
  sends a DHCPNAK packet saying you cant 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.

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DHCP Basics
Network Parameters
IP Address Tracking Management
Scope size Lease Times
Exclusion Area
Reservations

• 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 clients MAC address
• o 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

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DHCP Basics
Client Address Leases
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DHCP Basics
Typical Client Parameters Provided
Typical DHCP Properties
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DHCP Basics
Reservations
Exclusion Areas
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Complete Site DHCP Service
SBBC Dynamic Host Control Protocol (DHCP) Network
Standard
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
Gateway 10.x.192.1-2
10.x.128.1-2 Server range 10.x.192.1-20
10.x.128.1-20 Printers10.x.192.21-193.255
10.x.128.21-129.255 (510 Addresses)
DHCP Wireless Clients (1020 Addresses)
Reserved Network Equipment (255 Addresses)
Elementary/Middle/High Primary Wireless (176)
VLAN 10.x.176.1 10.x.112.1 10.x.176.255
10.x.112.255 10.x.177.1
10.x.113.1 10.x.188.255 10.x.125.255 10.x.18
9.1 10.x.126.1 10.x.191.254
10.x.127.254
Static Printers and Servers (255Addresses)
DHCP Wired Clients (3060 Addresses)
Backup DHCP Server (764 Addresses)
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KCW DHCP Structure
4 Floor 1
5 Floor 2
6 Floor 3
7 Floor 4
2 Floor 5
Static Printers and Servers (255Addresses)
10.201.0.3 10.201.0.255 10.201.1.0 10.201.5.255
10.201.6.0 10.201.6.255 10.201.7.0 10.201.7.254
10.202.0.3 10.202.0.255 10.202.1.0 10.202.5.255
10.202.6.0 10.202.6.255 10.202.7.0 10.202.7.254
10.203.0.3 10.203.0.255 10.203.1.0 10.203.5.255
10.203.6.0 10.203.6.255 10.203.7.0 10.2037.254
10.204.0.3 10.204.0.255 10.204.1.0 10.204.5.255
10.204.6.0 10.204.6.255 10.204.7.0 10.204.7.254
10.205.0.3 10.205.0.255 10.205.1.0 10.201.5.255
10.205.6.0 10.205.6.255 10.205.7.0 10.205.7.254
DHCP Server IP Addresses Primary room 202
CER 10.202.0.9 Backup a ETS 10.252.128.159
DHCP Wired Clients (1275 Addresses)
Backup DHCP Server (255 Addresses)
Network Equipment Range (254 Addresses)
8 Floor 6
9 Floor 7
3 Floor 8
10 Floor 9
14 Floor 10
Static Printers and Servers (255Addresses)
10.206.0.3 10.206.0.255 10.206.1.0 10.206.5.255
10.206.6.0 10.206.6.255 10.206.7.0 10.206.7.254
10.207.0.3 10.207.0.255 10.207.1.0 10.207.5.255
10.207.6.0 10.207.6.255 10.207.7.0 10.207.7.254
10.208.0.3 10.208.0.255 10.208.1.0 10.208.5.255
10.208.6.0 10.208.6.255 10.208.7.0 10.208.7.254
10.209.0.3 10.209.0.255 10.209.1.0 10.209.5.255
10.209.6.0 10.209.6.255 10.209.7.0 10.209.7.254
10.210.0.3 10.210.0.255 10.210.1.0 10.210.5.255
10.210.6.0 10.210.6.255 10.210.7.0 10.210.7.254
DHCP Wired Clients (1275 Addresses)
Backup DHCP Server (255 Addresses)
Network Equipment Range (254 Addresses)
11 Floor 11
12 Floor 12
13 Floor 13
1 Floor 14
Wireless
VOIP
Static Printers and Servers (255Addresses)
10.211.0.3 10.211.0.255 10.21.1.0 10.211.5.255 1
0.211.6.0 10.211.6.255 10.211.7.0 10.211.7.254
10.212.0.3 10.212.0.255 10.212.1.0 10.212.5.255
10.212.6.0 10.212.6.255 10.212.7.0 10.212.7.254
10.213.0.3 10.213.0.255 10.213.1.0 10.213.5.255
10.213.6.0 10.213.6.255 10.213.7.0 10.213.7.254
10.214.0.3 10.214.0.255 10.214.1.0 10.214.5.255
10.214.6.0 10.214.6.255 10.214.7.0 10.214.7.254
10.215.0.3 10.215.0.255 10.215.1.0 10.215.5.255
10.215.6.0 10.215.6.255 10.215.7.0 10.215.7.254
10.216.0.3 10.216.0.255 10.216.1.0 10.216.5.255
10.216.6.0 10.216.6.255 10.216.7.0 10.216.7.254
DHCP Wired Clients (1275 Addresses)
Backup DHCP Server (255 Addresses)
Network Equipment Range (254 Addresses)
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(No Transcript)
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Step 1
10.25.
Cypress Bay
Step 2
Enter Name Or Enter TCP Scope Range
Step 3
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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
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DHCP Basics
Reservations
On Server Open DHCP
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DHCP Basics
Reservations
Click on the wired scope and select reservations
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DHCP Basics
Reservations
Click Action then select New Reservation
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DHCP Basics
Reservations
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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DHCP Basics
Reservations
The reservation will show as follows
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DHCP Basics
Reservations
The reservation will show as follows