ADC Telecommunications, Inc.252 C HAPTER 12: C ONFIGURING DHCP R ELAYFor example, you can configure the system to match on the DHCP packet todetermine whether the request originated from a cable modem, a CPE, aMTA device, a specific interface, or a specific MAC address; wildcards can beused to match portions of a MAC address. In the event of a match, you canconfigure the DHCP relay agent to forward the request to a list of up to 32DHCP servers, or configure the agent to drop the request.If there are no policies defined, or a DHCP packet does not match anyexisting policy, the default policy is used to determine if the packet isdropped or forwarded to a list of up to 32 DHCP servers. The Cuda 12000ships with a default policy to deny (drop) DHCP requests that do not matchany other policy. Note that while other DHCP policies are interface-specific,the default DHCP policy is module-wide—it provides default behavior for allinterfaces on the module. This default policy can be modified but notdeleted.About BOOTP PoliciesBOOTP is a protocol that allows diskless workstations to boot off of anetwork server, called a BOOTP server. You can configure the cable interfaceto deny (drop) a matching BOOTP request or permit it to be forwarded to alist of BOOTP servers.
