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DHCP-Further Subnet (DHCP (Scopes (A scope is a container for…
DHCP-Further Subnet
DHCP
Used
Centralise IP configuration settins
Allow flexibility in IP address management
Cater for "nomadic" user who need to work at numerous branch
How it work
Follow the DORA process refer to note for detail
Renewal
Renew when 50% of the lease has expired
Using unicast process to renew everytime time start up
If fail to renew it will lease after 87.5% expired then use DORA
Scopes
A scope is a container for administrating a pool of address
All address in a Pool must come from the same subnet
A Server can have many Scopes
A Scope can have numerous pools of addresses (rare)
Exclusion
Some devices need to have their IP settings manually configured
These addresses cannot be offered to other devices
Exclusions prevents the DHCP SERVER from offering addresses
Reservation
Ensure a device is allocated the same IP address
Allocation is based on the device's MAC address
Applied
Server
Scope
Reserved Client
Supernetting
Use when your network too small
Class C was the easiest to purchase
Combine network must be contiguos
Chosen subnet must be
adjacent
and must be
consolidate
within upper boundaries
Design Subnet Plan
Subnet Adress
Choose the number of subnet bits based on the number of subnet required
EX: For five location the subnet required is 5 this mean 3 host bit must be borrow
Host Address
Choose the number of host bits based on the number of host you required on each subnet
Ex: For subnet with 100 host, seven host bit are required