dhcp-client-identifier
dhcp-client-identifier
fixed-address

Heritage Series ADSL Bridge/ Router

8-7

DHCP Server Operation

Host

host hostname { [ parameters ] [ declarations ]

}

There must be at least one host statement for every BOOTP client that is to be served. Host statements may also be specified for DHCP clients, although this is not required unless booting is only enabled for known hosts. If it is desirable to be able to boot a DHCP or BOOTP client on more than one subnet with fixed addresses, more than one address may be

specified in theparameter, or more than one host statement may be specified. If client-specific boot parameters must change based on the network to which the client is attached, then multiple host statements should be used. If a client is to be booted using a fixed address if it’s possible, but should be allocated a dynamic address otherwise, then a host statement must be specified without a fixed-addressclause. hostname should be a name identifying the host. If a hostname option is not specified for the host, hostname is used. Host declarations are matched to actual DHCP or

BOOTP clients by matching theoption specified in the host declaration to the one supplied by the client, or, if the host declaration

or the client does not provide aoption, by matching the hardware parameter in the host declaration to the network hardware address supplied by the client. BOOTP clients do not normally provide a dhcp-client-identifier, so the hardware address must be used for all clients that may boot using the BOOTP protocol.

Group

group { [ parameters ] [ declarations ] }

The group statement is used simply to apply one or more parameters to a group of declarations.

It can be used to group hosts, shared networks, subnets, or even other groups.

8.4.3 ALLOW and DENY

The allow and deny statements can be used to control the behaviour of the DHCP server in response to various sorts of requests.

unknown-clients

allow unknown-clients;

Page 130
Image 130
IBM Heritage user manual Allow and Deny, Host, Group, Unknown-clients

Heritage specifications

IBM, or International Business Machines Corporation, is a global leader in technology and consulting, with a heritage that spans over a century. Established in 1911, IBM initially emerged from a merger of four companies, and it has since evolved into one of the most influential players in the tech industry.

One of the main features of IBM’s legacy is its commitment to innovation. The company has a long history of technological breakthroughs, including the development of the first programmable computer, the IBM 701, in the early 1950s. IBM has also been at the forefront of many pivotal technologies, including mainframe computers, which became central to large-scale enterprise computing. The System/360, introduced in 1964, revolutionized the industry by offering a compatible range of computers that could run the same software, a concept that helped define the standardization of computer systems.

IBM’s contributions to artificial intelligence, particularly through its Watson platform, are another hallmark of its heritage. Watson gained international fame for its success on the quiz show Jeopardy! in 2011, showcasing advanced natural language processing capabilities and machine learning techniques. This technology has since found applications in various fields, from healthcare to finance, significantly transforming data analysis.

Another key characteristic of IBM is its focus on research and development. With an impressive portfolio of patents, IBM consistently ranks among the top patent holders annually. Their research endeavors have led to significant advancements in quantum computing, with initiatives like the IBM Quantum Experience making quantum technologies accessible to developers and researchers.

Sustainability is also a priority for IBM, with programs aimed at promoting environmental responsibility. The company has committed to achieving net-zero greenhouse gas emissions by 2030, reflecting the growing importance of sustainability in technology practices.

In summary, IBM's heritage is characterized by a strong legacy of innovation, technological leadership, and a commitment to addressing contemporary challenges in business and society. From pioneering mainframe systems to leading the charge in AI and quantum computing, IBM continues to shape the future of technology while maintaining a visionary outlook towards a sustainable and inclusive digital world.