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What is the IP helper address used for?
ip helper-address address Using the network address enables other servers to respond to DHCP requests. If you have multiple servers, you can configure one helper address for each server.
What is IP DHCP pool?
Dynamic Host Configuration Protocol (DHCP) is an application layer protocol used to distribute various network configuration parameters to devices on a TCP/IP network. A DHCP server is configured with a pool of available IP addresses and assigns one of them to the DHCP client.
What does DHCP helper do?
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 …
How do I use an IP helper-address?
Configuring an IP helper address
- Enter the global configuration mode by issuing the configure terminal command. device# configure terminal.
- Enter the interface configuration mode.
- Add a helper address for the server.
- By default, an IP helper does not forward client broadcast requests to a server within the network.
What is DHCP pool size?
You can customize the DHCP pool subnet and address range to provide simultaneous access to more number of clients. The pool can support up to 2048 addresses. The default size of the IP address pool is 512.
What’s the difference between DHCP and ip helper address?
How IP helper address works and what is the difference between dhcp and IP helper-address .please explain in brief. 2 Answers 2. Using the ip helper-address command sets up a DHCP relay. DHCP only works on the LAN to which it is connected because it uses broadcast, which cannot cross a router.
Can a DHCP pool have a secondary IP address?
For Option 1: As Milan mentioned, if you have configured a DHCP pool with a primary subnet and a secondary network as well, then first the primary pool would be exhausted and then secondary pool would be used to allocate the ip address.
Why does DHCP only work on the LAN?
DHCP only works on the LAN to which it is connected because it uses broadcast, which cannot cross a router. To remedy that situation, DHCP relay was created.
How does an IP Helper Address work in Cisco?
It gives DHCP an option so that a router intercepts the DHCP client’s broadcast request, creates a unicast request to the DHCP server on a different LAN, and the DHCP server can give a unicast response to the router based on the DHCP option, that then passes on the DHCP response to the requesting DHCP client.