CCNP Study Notes 18--dhcp

Dynamic Host Configuration Protocol

DHCP: Broadcast packet

Help Address:

Resolve a DHCP server to service different network segments

How to provide DHCP service (through broadcast domain) = = Help address for multiple network segments when there is only one DHCP server

Help address: Convert the broadcast to a unicast address and reach the DHCP server

Configure an interface to receive broadcast addresses

int E0

IP Add 144.253.1.100 255.255.255.0

IP helper-address 144.253.2.1

IP helper-address 144.253.2.2

IP helper-address 144.253.2.3

-Can transfer packets with destination address UDP broadcast

-Turn the destination address from broadcast to unicast

Global: IP forward-protocol {UDP [port]}

Specify a forwarding port number

-Sho IP DHCP database//display of activated DHCP databases

-Sho IP DHCP server statistics//displays current information as well as parameters and message sending and receiving conditions

-Sho IP DHCP binding//Display assigned address

-Sho IP route DHCP//display information added to the routing table via the DHCP service

-Debug IP DHCP server {events | packets | linkage}

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/79/39/wKiom1aLvarw0Q71AABR5Kyzz8M184.png "title=" QQ picture 20160105205701.png "alt=" Wkiom1alvarw0q71aabr5kyzz8m184.png "/>

R1:

IP DHCP Pool test

Network 10.1.1.0 255.255.255.0

Default-router 10.1.1.1

Dns-server 8.8.8.8

Exi

IP dhcp excluded-address 10.1.1.1 10.1.1.99

R3:R4 Analog PC

int f0/0

IP add DHCP//router get address via DHCP

No Shu

R5: R5 is unable to receive R1 DHCP at this time. All required f1/0 configuration help addresses in R2

R2:int f1/0

IP Add 20.1.1.2 255.255.255.0

int f1/0

IP help-address 11.1.1.1 (any address up to R1 is OK)

Guaranteed to reach, R1 R2 Configure routing protocol

Router ei 10

No auto

NET 12.1.1.0

NET 20.1.1.0

R1:int Lo10

IP Add 11.1.1.10 255.255.255.0

Router ei 10

No auto

NET 12.1.1.0

NET 11.1.1.0

R1 need to configure the address pool to match the 20 segment on the R2 R5 to assign an address to R5

IP DHCP test1

Network 20.1.1.1 255.255.255.0

Default 201.1.1.1

Exi

IP Dhcp-ex 20.1.1.1 20.1.1.99

R5: Testing

Sho IP int BRI

CCNP Study Notes 18--dhcp