Allied Telesis AT-9724TS specifications DHCP/BootP Relay Settings, DNS Relay

		Figure 6- 122. DHCP/BootP Global Settings window
The following fields can be set:
	Parameter	Description
	BOOTP Relay Status	This field can be toggled between Enabled and Disabled using the pull-down menu. It is used to enable or disable
	BOOTP HOPS Count Limit	the BOOTP/DHCP Relay service on the Switch.The default is Disabled.
		This field allows an entry between 1 and 16 to define the maximum number of router hops BOOTP messages
(1-16)
	BOOTP Relay Time Threshold	can be forwarded across.The default hop count is 4.
		Allows an entry between 0 and 65535 seconds, and defines the maximum time limit for routing a
(0-65535)
		BOOTP/DHCP packet. If a value of 0 is entered, the Switch will not process the value in the seconds field of
		the BOOTP or DHCP packet. If a non-zero value is entered, the Switch will use that value, along with the hop
		count to determine whether to forward a given BOOTP or DHCP packet.
Click Apply to implement changes made.

DHCP/BootP Relay Settings

The DHCP/BootP Relay settings allow the user to set up a server, by IP address, for relaying DHCP/BootP information to the Switch.The user may enter a previously configured IP interface on the Switch that will be connected directly to the DHCP/BootP server using the following window. Properly configured settings will be displayed in the BootP Relay Table at the bottom of the following window, once the user clicks the Add button.The user may add up to four Server IPs per IP interface on the Switch. Entries may be deleted by clicking it’s corresponding ✘.

		Figure 6- 123. DHCP/BootP Relay Settings and BootP Relay Table window
The following parameters may be configured or viewed.
	Parameter	Description
	Interface	The IP interface on the Switch that will be connected directly to the Server.
	Server IP	Enter the IP address of the DHCP/BootP server. Up to four Server IPs can be configured per IP Interface.

DNS Relay

Computer users usually prefer to use text names for computers they may want to open a connection with. Computers themselves, require 32 bit IP addresses. Somewhere, a database of network devices’ text names and their corresponding IP addresses must be maintained.

The Domain Name System (DNS) is used to map names to IP addresses throughout the Internet and has been adapted for use within intranets.

For two DNS servers to communicate across different subnets, the DNS Relay of the Switch must be used.The DNS servers are identified by IP addresses.

Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch 123