NOTE

Networking Concepts

Address Resolution

Address Resolution

Address resolution in NS networks refers to the mapping of node names to IP addresses and the mapping of IP addresses to lower level addresses (such as an X.25 address or a station address). Several address resolution methods are available for you to use individually or in combination with each other. You can configure these methods according to the needs of your network.

The available address resolution methods are:

Domain name services.

Network directory.

Probe (and probe proxy) (LAN, 100VG-AnyLAN, and 100Base-T only).

Address resolution protocol (ARP) (LAN, Token Ring, FDDI, 100VG-AnyLAN, and 100Base-T only).

Domain Name Services

The domain name services are a mechanism for resolving node names to IP addresses. They conform to an open networking standard and will facilitate communications between HP e3000 systems as well as with non-HP e3000 nodes.

To use the domain name services, you must assign a name, in ARPANET standard format, to each system on the network or internetwork. You configure this name on the NS Configuration screen (see configuration chapters for details).

You will also need to create a set of ASCII files on each system which contain the addressing information the system will need. Instructions for creating these files are in Chapter 12 , “Configuring Domain Name Files.”

Once you have configured the domain name services, the network will be able to access the node using its domain name and the domain name service routines will resolve the domain name to the node’s IP address.

Domain name services provide name to IP address resolution only. If a lower level address is required for network communication (for example, an X.25 address) you will need to configure the network directory as well.

Chapter 2

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