Sdlc Status - H3C MSR 20-20 Command Reference Manual

Description
Example

sdlc status

Syntax
View
Parameter
Description
Use the
sdlc simultaneous
interface to work in two-way simultaneous mode, so that the primary SDLC
station can send data to and receive data from a secondary station at the same
time.
Use the undo sdlc simultaneous
By default, the data transmission mode is "alternate".
# Enable the two-way simultaneous mode for SDLC data on Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] sdlc simultaneous
sdlc status { primary | secondary }
undo sdlc status { primary | secondary }
Synchronous serial interface view
primary: Specifies that the SDLC device connected to the router is "secondary".
secondary: Specifies that the SDLC device connected to the router is "primary".
Use the sdlc role command to configure a SDLC role.
Use the
undo sdlc role
By default, the device has no role.
SDLC is an "unbalanced" link layer protocol. That is, the end systems across a TCP
connection are not equal in the positions: one is primary and the other is
secondary. The primary station, whose role is primary, plays a dominant role and
controls the whole connection process. The secondary station, whose role is
secondary, is controlled by the primary station. Therefore, we need to configure a
role for an SDLC interface.
In the SDLC role configuration, the role of an interface should be determined by
the role of the SDLC device to which this router is connected:
If the SDLC device connected with the local router has a role of primary, the
■
local interface should be configured to have a role of secondary;
If the SDLC device connected with the local router has a role of secondary, the
■
local interface should be configured to have a role of primary.
Generally, an IBM mainframe has a role of primary, while a terminal device such
as a UNIX host or an Auto Teller Machine (ATM) has a role of secondary.
command to configure the SDLC synchronous serial
command to restore the default mode.
command to remove the configured SDLC role.
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