Installing and Administering OSI Transport Services

88 Chapter 3

Gathering Conﬁguration Information

Using the Remote System Worksheet

LAN Subnetwork Information

This box indicates what subset of the CLNS protocol is supported.

ISO 8878 Support This indicates whether the remote supports the

use of the X.25 extended addressing facility, as

prescribed by ISO 8878 (Use of X.25 to provide

CONS). Systems that do not use this facility

should have their NSAP match their X.25

address (X.121 + Subaddress).

Accept Reverse

Charging

If true, the vendor allows the call charges to be

billed “collect.” Typically this is set to “N”.

X.25 Standard This indicates which X.25 capabilities are

supported by the system. The 1984 standard

provides more facilities than the 1980 standard.

At least one must be circled. (Circle all that

apply or will be allowed by the X.25 service).

CLNP Subset U.S. GOSIP requires the use of the Full subset,

with NULL CLNP packets being discarded. This

is the default for HP systems. The NULL subset is

used only when all destination OSI nodes are

physically connected via the same LAN. It

provides low overhead at the cost of

internetworking. It also requires that the NSAP

match the MAC address of the system.

Non-segmenting and Full subset (accept NULL)

are less frequently used, but are supported by HP.

ES/IS Supported Indicates whether this node supports the End

System/ Intermediate System protocol. With this

protocol, subnetwork addressing information is

done dynamically. Therefore, other systems on the

network do not need to statically conﬁgure this

addressing information.