Scenario 1-5: Configuring IP Helper Address
The following scenario demonstrates the powerful use of the helper command and how broadcast traffic, which is dropped by default on Cisco routers, can be forwarded in a manageable fashion and enable IP connectivity across a WAN.
In this scenario, you have a group of users on one segment requiring IP address assignment. No local servers reside on the segment with this group of users.
Figure 1-6 displays the network topology.
Figure 1-6. IP Helper Requirement
Now, when the users on the local-area network (LAN) segment attached to R1 send out a request for an IP address, this IP packet is sent to the broadcast ...
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