DHCP

1. Dynamic Host Configuration Protocol (
DHCP )
Networkin
g

2. Group 5 :
• Asif Al Mahmud ( 162-15-771 )
• Ali Hosen ( 162-15-777 )
• Faisal Kabir ( 162-15-768 )

3. What is DHCP ?
DHCP (Dynamic Host Configuration Protocol) is
a protocol used to provide quick, automatic,
and central management for the distribution
of IP addresses within a network. DHCP is
also used to configure the proper subnet
mask, default gateway, and DNS server
information on the device.

4. How it’s works
?

5. Advantage of DHCP
• There is no need to manually configure each client with an
IP address.
• You don't need to keep a record of the IP addresses that
you have assigned.
• You can automatically assign a new IP address if you move a
client to a different subnet.
• You can release the IP address of a computer that is
offline and reassign the address to another computer.
• Address duplication is eliminated as DHCP automatically
tracks IP address assignments.
• The DHCP server can detect unauthorised DHCP servers on the
network.

6. Disadvantage of DHCP
• DHCP server can be single point of failure in networks having only one
configured DHCP server.
• DHCP packets can not travel across router, Hence relay agent is necessary to
have DHCP server handle all leases on both network segments. Relay agents
receive broadcast DHCP packets and forward them as unicast packets to DHCP
server. Here relay agent must be configured with IP address of the DHCP
server.
• Security: As DHCP server has no secure mechanism for authentication of the
client, it can gain unauthorized access to IP addresses by presenting
credentials such as client identifiers which belong to other DHCP clients.
• The machine name does not change when new IP address is assigned.
• Client is not able to access the network in the absence of the DHCP server.

7. Our Project

8. We Use
• DHCP
• Rip
• IP Phone
• Access Point

9. DHCP
Commend :
• Router(config)#ip dhcp pool voice
• Router(dhcp-config)#network 50.0.0.0
255.255.252.0
• Router(dhcp-config)#default-router
50.0.0.2
• Router(dhcp-config)#option 150 ip
50.0.0.2
• Router(dhcp-config)#exit

10. Rip
Commend :
• Router(config)#router rip
• Router(config-router)#version 2
• Router(config-router)#no auto-summary
• Router(config-router)#network
50.0.6.0
• Router(config-router)#network
50.0.6.1
• Router(config-router)#exit

11. IP Phone
Commend :
• Router(config)#telephony-service
• Router(config-telephony)#max-ephone 2
• Router(config-telephony)#max-dn 2
• Router(config-telephony)#ip source-address
50.0.4.2 port 2000
• Router(config-telephony)#auto assign 4 to 6
• Router(config-telephony)#auto assign 1 to 5
• Router(config-telephony)#exit

12. Access Point

13. Thank You all
Networkin
g