Envoy ACP/XF Configuration and Management Manual

WAN Subsystem Profiles and Modifiers for

EnvoyACP/XF

EnvoyACP/XF Configuration and Management Manual—429232-003

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Optional Modifier Descriptions

L2RETRY

Specifies the maximum number of station protocol-level, error-recovery attempts that

can be made before an error is reported to the application. These errors include frames

not acknowledged and poll-response timeouts. This modifier does not apply to the

mode-setting commands (commands used to establish, initialize, and shut down the

data link).

You can set or override this modifier by issuing a SETMODE 15 call in an application

or by issuing an SCF ALTER LINE command to the EnvoyACP/XF subsystem.

L2WINDOW

Specifies the maximum number of I-frames that the station can send without receiving

an acknowledgment.

The number of I-frames sent (Ns) and the number of I-frames received (Nr) is indicated

in the control field of the I-frame. If the line is configured for standard control fields, the

field that holds the Ns variable is only 3 bits long; thus, the maximum number of

I-frames that can be sent without acknowledgment is 7. If the line is configured for

extended control fields, the field that holds the Ns variable is 7 bits long; thus, the

maximum number of I-frames that can be sent without acknowledgment is 127.

You can set or override this modifier by issuing a SETMODE 18 call in an application

or by issuing an SCF ALTER LINE command to the EnvoyACP/XF subsystem.

Default: 3

Units: Level-2 retries

Range: 0 through 255

See

also:

IDLECMDRR/IDLERESPRR, IDLETIMER, and T1TIMER

Default: 7

Units: Number of outstanding I-frames

Range: 1 through 7 for standard control fields

1 through 127 for extended control fields

See

also:

EXTENDEDCONTROL/NOEXTENDEDCONTROL

Note. The window size used by the local system must match the window size used by the

remote system.