Main Panel Tabs: Address Ranges; Dhcp Subnets - Nortel BCM50 Configuration Manual

486 Chapter 66 DHCP Server Settings panel

Main panel tabs: Address Ranges

Warning: Whenever you make changes to the address range, the DHCP server may
become unavailable to clients for a brief period of time. When making changes, consider
doing so at a time that will minimize the effect on users.
The Address Ranges tab specifies IP addresses to be provided to DHCP clients. The Address
Ranges tab has two tables: Included Address Ranges and Reserved Addresses.The Included
Address Ranges specifies a range of IP addresses to be provided to DHCP clients.

DHCP subnets

By default, the DHCP server on the BCM must configure a range of IP addresses to supply the IP
sets. It defaults to use the top 20 percent of a subnet. For example, if an external DHCP server
supplies the following IP address to the BCM: 177.218.21.45/255.255.255.0, then the BCM
DHCP server configures itself to reserve the following range 177.218.21.200-177.218.21.254.
You can use Element Manager to check and change this default. The Reserved Addresses table
lists IP addresses that are reserved for specific clients. These IP addresses can fall within an
Included Address Range, or they can be outside any Included Address Ranges.
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