DHCP Server

Configuration > [Unity Overlays] DHCP Server

You can reduce your workload by using this page to configure global defaults for Dynamic Host Configuration Protocol (DHCP).

n	These defaults apply to the LAN interfaces in Deployment Profiles that specify Router mode.

n	There are three choices:

•

No DHCP

•	Each LAN interface acts as a DHCP Server.

•	The Silver Peak appliance acts as a DHCP Relay between a DHCP server at a data center and clients needing an IP address.

n	On the Configuration > Deployment Profiles tab, the selected default displays consistently under each LAN–side IP/Mask field.

For any LAN–side interface, you can override the global default by clicking the Edit icon to the right of the label and changing the values or selection.

n	Changes you save to the global default only apply to new configurations.

n	To view or revise the list of reserved subnets, click Monitor.

DHCP Server Definitions

n	DHCP Pool Subnet/Mask is the full range of IP addresses that you make available for your network.

n	Subnet Mask is a mask that specifies the default number of IP addresses reserved for any subnet. For example, entering 24 reserves 256 IP addresses.

n	Start Offset specifies how many addresses not to allocate at the beginning of the subnet's range. For example, entering 10 means that the first ten IP addresses in the subnet aren't available.

n	End Offset specifies how many IP addresses are not available at the end of the subnet's range.

n	Default lease and Maximum lease specify, in hours, how long an interface can keep a DHCP–assigned IP address.

n	Default gateway, when selected, indicates that

n	DNS server(s) specifies the associated Domain Name System server(s).

n	NTP server(s) specifies the associated Network Time Protocol server(s).

n	NetBIOS name server(s) is used for Windows (SMB) type sharing and messaging. It resolves the names when you are mapping a drive or connecting to a printer.

n	The NetBIOS node type of a networked computer relates to how it resolves NetBIOS names to IP addresses. There are four node types:

•	B-node = 0x01 Broadcast

•	P-node = 0x02 Peer (WINS only)

•	M-node = 0x04 Mixed (broadcast, then WINS)

•	H-node = 0x08 Hybrid (WINS, then broadcast)

DHCP Relay Definitions

n	Destination DHCP Server is the IP address of the DHCP server assigning the IP addresses.

n	Enable Option 82, when selected, inserts additional information into the packet header to identify the client's point of attachment.

n	Option 82 Policy tells the relay what to do with the hex string it receives. The choices are append, replace, forward, or discard.

Please send comments or suggestions regarding user documentation to techpubs@silver-peak.com.