forphil.blogg.se - Ip helper windows 10

Verify that R2 can receive a DHCP address from R1 in the 10.116.20.0/24 network.

On SW1 configure the VLAN20 interface with an IP Helper address that points to 10.116.10.1.

On R1 create a new DHCP pool called “LAB_POOL2″ and assign it the following attributes network 10.116.20.0/24, default-router of 10.116.20.2, domain name TESTLAB.LOCAL, DNS servers 10.116.18.6 & 10.116.18.7.

!# Free CCNA Workbook Lab 11-6 SW1 Initial Config # !# Free CCNA Workbook Lab 11-6 R2 Initial Config # !# Free CCNA Workbook Lab 11-6 R1 Initial Config #

Establish a console session with devices R1, R2 and SW1 than load the initial configurations provided below by copying the config from the textbox and pasting it into the respected routers console.

If you are using GNS3 than load the Free CCNA Workbook GNS3 topology than start devices R1, R2 and SW1.

The following logical topology shown below is used in this lab

This command is executed in interface configuration mode to enable a Layer 3 interface to receive BOOTP DHCP Request and forward them to a specified DHCP server. You will test the DHCP and IP Helper configuration using R2 as a simulated host PC.įamiliarize yourself with the following new command(s) Command In this lab R1 and R2 are placed separate VLAN’s and you will create DHCP pools for each VLAN on R1 then configure an IP Helper address on SW1’s VLAN20 interface connecting to R2 VLAN to ensure that devices on that Ethernet segment can receive DHCP IP address from the DHCP Server (R1).

For example, a VLAN interface or an Ethernet interface on a router connected to a Cisco switch or segregated by a layer 2 VLAN. To configure an IP helper address you’ll use the ip helper-address a.b.c.d in interface configuration mode on the interface that is connected to the broadcast domain in which you wish to provide DHCP IP addresses. DHCP IP Helper addresses are IP addresses configured on a routed interface such as a VLAN Interface or a routers Ethernet interface that allows that specific device to act as a “middle man” which forwards BOOTP (Broadcast) DHCP request it receives on an interface to the DHCP server specified by the IP Helper address via unicast. Many people wonder how this works but the answer is quite simple. So have you ever wondered how a single DHCP server can provide DHCP IP addresses to every PC on the network when the DHCP server is not on the same broadcast domain? After all DHCP request are broadcast request right?