hosts.vt(4) CLIX hosts.vt(4)
NAME
hosts.vt - ISO/OSI virtual terminal application address database
DESCRIPTION
The /etc/hosts.vt file maps names to application entity titles and names
to presentation addresses. The application entity name with a maximum of
39 characters uniquely identifies each OSI system.
The presentation address of an application entity is defined as a PSAP-
selector (presentation service access point), SSAP-selector (session
service access point), TSAP-selector (transport service access point), and
NSAP-address (network service access point).
Communication between the ISO/OSI layers is through these service access
points (SAPs). An application entity (AE) can access the services of a
particular presentation entity (PE) through a PSAP. A PSAP is identified
by a PSAP-selector, which is used by the PE to identify the particular AE.
An SSAP-selector is used by the session entity (SE) to identify the
particular PE. A TSAP-selector is used by the transport entity (TE) to
identify the particular SE.
Refer to the ISO/OSI Product Overview in the Intergraph ISO/OSI
Administrator's Guide for a detailed description of an NSAP.
The network service access point (NSAP) address and application entity
title adhere to the standard ISO 6523. This file requires the system
administrator to assign the subnetwork point of attachment (SNPA) for each
name in the file.
Information is written to the /etc/hosts.vt file when you use the
osiconfig command to configure vt.
EXAMPLE
In the following example of an /etc/hosts.vt file, lines that begin with a
number sign (#) are comments.
# Intergraph Virtual Terminal Host Table
# Field definitions:
# AE_NAME = Maximum of 39 characters with trailing space
#
# AE_TITLE = { ISO(1) IDENTIFIED-ORGANIZATION(3) OIW(14) VTSIG(12) }
#
# AE_QUALIFIER = 0
#
# NETWORK ADDRESS = / - delimits fields
#
# 1.) Gosip V1 NSAP Address
#
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hosts.vt(4) CLIX hosts.vt(4)
# Initial Domain Part (IDP)
# | Domain Specific Part (DSP)
# | |
# | |
# +-----------+--------------------------------------+
# | IDP | DSP |
# +-----+-----+--------+-------+--------------+------+
# | AFI | IDI | ORG ID | SN ID | System | NSEL |
# +-----+-----+--------+-------+--------------+------+
# Octets 1 2 2 2 4-8 1
# +-----+-----+--------+-------+--------------+------+
#
# Authority & Format Identifier (AFI)
# | Initial Domain Identifier (IDI)
# | | Organization Identifier (ORG ID)
# | | | Subnet Identifier (SN ID)
# | | | | End System Identifier (System)
# | | | | | NSAP Selector (NSEL)
# International | | Local | |
# Code | | 802.3 SNPA |
# Format (ICD) OSINET Intergraph LAN Address NSEL
# ============= ====== ========== ======= ============ ====
# 47 0004 003d 0001 000000000012 01
#
# 2.) Gosip V2 NSAP Address
#
# +-----------+-----------------------------------------------+
# | IDP | DSP |
# +-----+-----+-----+----+-----+-------+------+--------+------+
# | AFI | IDI | DFI | AA | Res | Route | Area | System | NSEL |
# +-----+-----+-----+----+-----+-------+------+--------+------+
# Octets 1 2 1 3 2 2 2 6 1
# +-----+-----+-----+----+-----+-------+------+--------+------+
#
# DSP Format Identifier (DFI)
# | Administrative Authority (AA)
# | | Reserved (Res)
# AFI IDI | | | Routing Domain (Route)
# | | | | | | Area (Area)
# | | | | | | |
# ICD OSINET GOSIP2 Intergraph | | | SNPA NSEL
# ===== ====== ====== ========== ==== ====== ====== ============ ====
# 47 0004 80 00003d 0000 0001 0001 080036f1e300 01
# AE_NAME {AE_TITLE} AE_QUAL /NETWORK ADDRESS /TSAP/SSAP/PSAP
# ======== =========== = =================== ==== ==== ====
# Your host name must be in this file with a correct NSAP address.
gabriel {1 3 14 12} 0 /470004003d000100000000000301/0001/0001/0002
gabriel_x {1 3 14 12} 0 /12834721945/0001/0001/0001/0002
t_gabriel {1 3 14 12} 0 /470004003d000100000000000301/0003/0007/0007
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hosts.vt(4) CLIX hosts.vt(4)
francis {1 3 14 12} 0 /470004003d000100000000000401/0001/0001/0002
t_francis {1 3 14 12} 0 /470004003d000100000000000401/0007/0007/0007
sybil {1 3 14 12} 0 /470004003d000100000000000801/0001/0001/0002
paulc {1 3 14 12} 0 /470004003d000100000000000901/0001/0001/0002
thunder {1 3 14 12} 0 /470004003d000100000000001201/0001/0001/0002
rene {1 3 14 12} 0 /470004003d000100000000000201/0001/0001/0002
t_rene {1 3 14 12} 0 /470004003d000100000000000201/0007/0007/0007
thunder {1 3 14 12} 0 /4700048000003d000000010001080036f1e30001/0001/0001/0002
pops {1 3 14 12} 0 /4700048000003d000000010001080036b0bd0001/0001/0001/0002
socrates {1 3 14 12} 0 /4700048000003d0000000100010800360c380101/0001/0001/0002
RELATED INFORMATION
Commands: osiconfig(8), iso_listener(8)
Files: isoservices(4)
Intergraph ISO/OSI Administrator's Guide
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