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The following list summarizes the parameters that are provided
in the x25init configuration
files. There are parameters that are used by the X.25/9000 product
that are not shown here. These parameters are ignored by the ACC
Mux drivers when x25init is
executed; they have no effect whether defined or not. A detailed
explanation of each parameter can be found in the Installing
and Administering X.25/9000 manual. The default and
valid range of values are as documented in the HP X.25/9000 manuals
unless stated otherwise. - lci
Provides the circuit table definition for the subsystem, which
includes the starting value of the logical channel identifier (lci), the type of virtual circuits,
and the number of the specified type of virtual circuits. Parameter values are as documented in the X.25/9000 manuals.
There is no default. - def_inpacketsize
Specifies the default maximum size, in octets, of
a level 3 inbound packet. Valid values are 16, 32, 64, 128, 256, 512,
1024, 2048 or 4096 octets. Default value is 128. - def_inthruput
Specifies the level 3 parameter for the rate of
data transmission, in bits per second, that is allowed inbound on
a switched virtual circuit. Valid values are 75, 150, 300, 600, 1200, 2400, 4800, 9600,
19200, 48000, 64000, 128,000, 192,000 or the corresponding CCITT
class numbers 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, 13, 14 or 15 respectively.
Default value is 19200 (class 11). - def_inwindow
Specifies the default maximum number of unacknowledged
inbound packets between the DTE and the DCE. Any value from 1 to
7 may be specified. Default value is 2. - def_outpacketsize
Specifies the default maximum size, in octets, of
a level 3 outbound packet. Valid values are 16, 32, 64, 128, 256,
512, 1024, 2048 or 4096 octets. Default value is 128. - def_outthruput
Specifies the level 3 parameter for the rate of
data transmission, in bits per second, that is allowed outbound
on a switched virtual circuit. Valid values are 75, 150, 300, 600, 1200, 2400, 4800, 9600,
19200, 48000, 64000, 128,000, 192,000 or the corresponding CCITT
class numbers 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, 13, 14 or 15 respectively.
Default value is 19200 (class 11). - def_outwindow
Specifies the default maximum number of unacknowledged
outbound packets between the DTE and the DCE. Any value from 1 to 7 may be specified. Default value is 2. - device
Specifies the name of device file that corresponds
to the Mux port being configured. (Refer to Chapter 4 “ZCOM Mux Subsystem Configuration”)
The default value is /dev/x25_0, which is an X.25/9000 format device
file, and therefore should not be used. For all but the 4-Channel
ACC interface, use the device file /dev/zx25m
Xp
Y, where the X refers to the ACC Mux, and
the Y refers
to the mux port. For T1/E1 4-Channel use device file /dev/zx25mX
pY
s Z,
where the Z refers to
the subchannel number. - fastselectaccept
Level 3 parameter that specifies if the use of the
fast select facility is allowed. Default is disabled. - flow_control
Level 3 parameter that specifies whether or not
flow control negotiation will be used. If this is on, the negotiated
level 3 packet size and level 3 window size should also be configured.
Default is off. - holdtimer
IP-related parameter. Specifies the hold timer in seconds.
Default is 300. - idletimer
IP-related parameter. Specifies the idle timer in seconds.
Default is 600. - IPaddress
IP-related parameter. Specifies the IP address for
the port if IP is used. No default value. - l2_modulo
Level 2 parameter that specifies the modulo value
to use for window rotation. The ACC cards support both modulo 8
and modulo 128. Default is 8. - l2window
Level 2 parameter that specifies the maximum number of
unacknowledged frames between the DTE and DCE. Default is 7. On
the ACC card, modulo 128 window sizes are available allowing a window
size value of 1-127. - mtu
IP-related parameter. Specifies the maximum number of
octets that may be transmitted in one IP packet. Default is 2048. - l3_modulo
Level 3 parameter that specifies the modulo value
to use for window rotation. The ACC cards only support modulo 8. - neg_inpacketsize
Specifies the default maximum size, in octets, of
a level 3 inbound packet when flow control negotiation is on. This
value is used as the “opening bid” in connection establishment
and the “counter offer” for incoming connections if
their “opening bid” is higher. Valid values are 16, 32, 64, 128, 256, 512, 1024, 2048 or 4096
octets. Default value is 128. - neg_inthruputclass
Specifies the level 3 parameter for the rate of
data transmission, in bits per second, that is allowed inbound on
a switched virtual circuit when throughput class negotiation is
enabled. This value is used as the “opening bid” in
connection establishment and the “counter offer” for
incoming connections if their “opening bid” is higher. Valid values are 75, 150, 300, 600, 1200, 2400, 4800, 9600,
19200, 48000, 64000, 128000, and 192000 or the corresponding CCITT
class numbers 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 respectively.
Default value is 19200 (class 11). - neg_inwindow
Specifies the default maximum number of unacknowledged
inbound packets between the DTE and the DCE when flow control negotiation
is turned on. This value is used as the “opening bid” in connection
establishment and the “counter offer” for incoming
connections if their “opening bid” is higher. Any value
from 1 to 7 may be specified. Default value is 2. - neg_outpacketsize
Specifies the default maximum size, in octets, of
a level 3 outbound packet when flow control negotiation is on. This
value is used as the “opening bid” in connection establishment
and the “counter offer” for incoming connections if
their “opening bid” is higher. Valid values are 16, 32, 64, 128, 256, 512, 1024, 2048 or 4096
octets. Default value is 128. - neg_outthruputclass
Specifies the level 3 parameter for the rate of
data transmission, in bits per second, that is allowed outbound
on a switched virtual circuit when throughput class negotiation
is enabled. This value is used as the “opening bid” in
connection establishment and the “counter offer” for
incoming connections if their “opening bid” is higher. Valid values are 75, 150, 300, 600, 1200, 2400, 4800, 9600,
19200, 48000, 64000, 128000, 192000 or the corresponding CCITT class
numbers 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 respectively.
Default value is 19200 (class 11). - neg_outwindow
Specifies the default maximum number of unacknowledged
outbound packets between the DTE and the DCE when flow control negotiation
is turned on. This value is used as the “opening bid” in connection
establishment and the “counter offer” for incoming
connections if their “opening bid” is higher. Any value
from 1 to 7 may be specified. Default value
is 2. - networktype
Specifies the network interface type. (Supported
values are DTE_80, DCE_80, DTE_84 and DCE_84.) Default is DTE_84. - name
Specifies the programmatic access name used for
level 3. Default is x25pgmaccess, however a unique name for each
X.25 link in the system must be assigned. - pvc_inpacketsize
Specifies the default maximum size, in octets, of
a level 3 inbound packet on a permanent virtual circuit. Valid values
are 16, 32, 64, 128, 256, 512, 1024, 2048 or 4096 octets. Default
value is 128. - pvc_inwindow
Specifies the maximum number of unacknowledged outbound
packets between DTE and DCE on a permanent virtual circuit. Any value from 1 to 7 may be specified. Default is 2. - pvc_outpacketsize
Specifies the default maximum size, in octets, of
a level 3 outbound packet on a permanent virtual circuit. Valid
values are 16, 32, 64, 128, 256, 512, 1024, 2048 or 4096 octets.
Default value is 128. - pvc_outwindow
Specifies the maximum number of unacknowledged outbound
packets between DTE and DCE on a permanent virtual circuit. Any value from 1 to 7 may be specified. Default is 2. - n2
Retransmission count specifies the maximum number of
times a given frame may be transmitted before an error condition
is identified. The valid range is limited to 1-31. Default is 20. - reverse_charge_accept
Specifies whether or not reverse charging is accepted.
Default is disabled. - t1
The t1 parameter specifies the amount of time to
wait for acknowledgment of a HDLC frame. The ACC Mux subsystem uses
different units to set this value than the other X.25/9000 interface
cards. The closest approximation to the value specified will be
used. The algorithm used by the ACC Mux subsystem for setting t1
is listed below. Default value is 3000 ms. 20 ms. £ t1 £ 1260 ms.
Nearest
20 ms. increment is used. 200 ms. £ t1 £ 12600 ms.
Nearest
200 ms. increment is used. - t2
The T2 timer parameter specifies the amount of time available
at the DTE or DCE/remote DTE before acknowledging frame must be
initiated in order to ensure its receipt by the DCE/remote DTE or
DTE, respectively, prior to Timer T1 running out at the DCE/remote
DTE or DTE. Note that timer T2 must be less than T1. The value used
is T1/2. - t3
The t3 (DCE) / t4 (DTE) parameter is a level 2 parameter
to specify the line idle time. It is used to identify an excessive
period of no-activity on the data link, suggesting a possible faulty
data link or physical link condition. The value of T3/T4 should
be greater than T1 and may be very large for applications which are
not concerned with early detection of faulty data link or physical
link conditions. - thruputclass
Specifies if throughput class negotiation is allowed between
peers. Default is off. - X.121
Specifies the X.121 address for the subsystem. No default
value. - X.121_packet
Specifies the X.121 packet address of some networks having
special characteristics, such as TransPac. Default value is the
X.121 address.
| | | |  | NOTE: Each X.25 link must have a unique X.121 address for
connection to a data network. | | | | |
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