TSHOOT 300-135 Ticket #13

TSHOOT on DHCP Helper-address

Hi ! everyone on today we are going study about DHCP helper- address through simple way by this given topology shown below.

What is meant by DHCP Helper-address ?

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. Now we will see the DHCP Helper-address in this topology using packet tracer version 7.1.

Configuration on DSW1:

!
interface Vlan 10
 ip address 10.2.1.1 255.255.255.0
 ip helper-address 10.2.21.129
!

Note: In this ticket you will find port-security configured on ASW1 but it is not the problem as the port-security is good (check with the “show interface fa1/0/1” command on ASW1.

Ans 1: DSW1
Ans 2: IP DHCP Server (or DHCP)
Ans 3: on DSW1 delete “ip helper-address 10.2.21.129” and apply “ip helper-address 10.1.21.129” command.

Therefore, we have understood this troubleshooting with the help of given topology as we seen already and on our next lab session we will look over on ipv6 GRE tunnel.