Digi TransPort, Руководство пользователя

Страница: 534 / 813

Configure X.25 parameters
Digi TransPort User Guide 534
Confirm Mode
When confirm mode is set to On , then the incoming TCP socket is not successfully connected
until the corresponding outgoing call has been connected. The incoming TCP socket triggers
the corresponding outgoing call either to a local PAD instance or to whatever is configured.
The effect of this mode is that the socket will fail if the outbound call fails and so may be
useful in backup scenarios. In addition it will ensure no data is sent into a “black hole”. (When
this setting is not enabled, data that is sent on the inbound TCP connection before the
outbound connection has been successful can be lost.)
RFC 1086 Mode:
RFC 1086 specifies a mode of operation in which the IP socket answers and then with a simple
protocol in the socket identifies the X.25 address and other X.25 call setup parameters to be
used. Then when the X.25 call parameters have been identified the X.25 call is made and if
successful then data is then switched between the X.25 call and the IP socket. The protocol
selects whether incoming or outgoing support is required.
IP length header
When IP length header is On , the IP length indicator field is inserted at the start of each
packet. When set to 8583 Ascii 4 byte , the IP length header conforms to the ISO 8583 format.
In the example above, 3 IP sockets will listen for an incoming connection on IP Port 2004 . Once
connected each socket makes an X.25 Call to jollyroger . The router recognizes that jollyroger
is a pre-defined macro (as illustrated below), and translates it into an X.25 Call to address
32423 with the string x25 data included as data in the call. The outgoing X.25 call(s) are made
over whichever interface is specified by the Switch from XOT(TCP) to parameter on the
Configuration > Network > Protocol Switch page.
Note At the top of the page, the total number of sockets available and the number currently
free is shown. Care should be take not to allocate too many of the free sockets unless you
are confident that they are not required for other applications.
Related CLI commands
Entity Instance Parameter Values
Equivalent Web
Parameter
ipx25 n ip_port 0-65535 IP Port
ipx25 n nb_listens 0-software-dependent max Number of Sockets
ipx25 n x25call NUA, NUI or X.25
macro name X25 Call
ipx25 n pid hex numbers PID
ipx25 n cnf_mode 1=enabled, 0=disabled Confirm Mode
ipx25 n rfc1086_mode 1=enabled, 0=disabled RFC 1086 Mode
ipx25 n iphdr 0=Off
1=On
2=8583 Ascii 4 byte IP length header