HP 3000 Manuals HP 3000 Manuals
Chapter 2 Maintaining X.400
This chapter describes the day-to-day operations required to maintain
X.400. This includes:
* Starting X.400
* Stopping X.400
* Backing up the X.400 configuration
* Restoring the X.400 configuration
* Changing the login password
* Saving old log files
Each of these maintenance
operations can be performed either by typing in a command at the HP-UX
prompt, or by using the administrator program(x4admin) which provides a
menu interface.
In this chapter, the maintenance operations are described using the menu
interface. For more details about the X.400 utilities, refer to Appendix
B.
The basic X.400 system consists of two components:
* MTA
--performs message routing, and message encoding and decoding.
* RTS
--handles all remote communications and file transfers to remote
MTAs.
The software that enables you to work with HP Desk consists of three
components:
* encoder
--encodes Interchange Format Files (IFFs)
into ASN.1 PDUs. Messages transmitted between X.400 and the HP
X.400/HP Desk Nodes are in IFF format.
* decoder
--decodes ASN.1 PDUs
into IFFs.
* x4xfer
--handles remote communications to all local HP X.400/HP Desk
Nodes.
The software that enables you to work with Sendmail consists of one
component:
* x4mailer
--accepts RFC822 formatted messages from Sendmail and converts
them into ASN.1 PDUs for the MTA; and accepts ASN.1 PDUs from the
MTA and converts them into RFC822 formatted messages for Sendmail.
All components use queues
to pass message files through the system. Queues are implemented as UNIX
directories. Messages in those directories are implemented as files.
Every queue in the system contains messages of a particular type: ASN.1
PDU
or IFF
. One queue, the UQ,
holds messages of more than one type.
The types of queues are:
* DOQ:
If you are using HP X.400 with HP Desk, there is one DOQ for each
HP X.400/HP Desk Node configured in X.400. The DOQ is the decoder
output queue. Messages in the DOQ are in IFF format.
* EIQ:
If your are using HP X.400 with HP Desk, there is one EIQ for each
HP X.400/HP Desk Node configured in X.400. The EIQ is the encoder
input queue. Messages in the EIQ are in IFF format.
* IQ:
There is one IQ in X.400. It is the input queue to the MTA. The
RTS, encoder, x4mailer, HP OpenMail/X.400 interface, or HP X.400
High-Level API may write into this queue. Messages in the IQ are
in ASN.1 format.
* LOOPIQ, LOOPOQ, LOOPLANOQ, LOOPFDDIOQ: These queues are used when
performing loopback operations. LOOPIQ and LOOPLANOQ are used
when doing loopback over LAN. LOOPIQ and LOOPOQ are used when
doing loopback over X.25. LOOPIQ and LOOPFDDIOQ are used when
doing loopback over FDDI.
* OQ:
There is one OQ for each adjacent MTA, HP X.400/HP Desk Node,
local Sendmail connection, local OpenMail connection, and API
client. The MTA is the only process writing into the OQs.
Messages in the OQ are in ASN.1 format.
* TQ:
There is one TQ in X.400. The TQ is the trace/archive queue. It
is used by the MTA to archive messages as they pass through the
MTA. The MTA archives a message before and after processing it for
delivery. Message archiving can be enabled/disabled by running
the x4admin program (select ARCHIVE when in the DIAGNOSTICS menu)
or by issuing the x4archive command. Messages in the TQ are in
ASN.1 format.
* UQ:
There is one UQ in X.400. The UQ is the undelivery queue. It is
used by all components except RTS to store messages which cannot
be parsed or completely processed. If you are using X.400 with HP
Desk, messages in the UQ can be in IFF or ASN.1 format depending
on the process writing into it.
You can determine the component that put a file into the UQ by the
prefix letter of the file name. For example, files beginning with
D are ASN.1 format files and have been placed in the UQ by the
decoder. Files beginning with M are ASN.1 format files and have
been placed in the UQ by the MTA. Files beginning with T are IFF
format files and have been placed in the UQ by the encoder. Files
beginning with X are ASN.1 format files and have been placed in
the UQ by x4mailer.
For information regarding queues and components used by the HP X.400 API,
refer to the HP X.400 API manual.