SNAX/XF and SNAX/APN Configuration and Management Manual

Configuring for Token-Ring Support
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
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Optional Remote PU Attributes
Optional Remote PU Attributes
Following are the optional PU attributes that support Token-Ring connections; you can
specify them or allow them to default:

LNMAXIN

LNMAXOUT

LNMAXOUTINCR

LNMAXRETRY

LNT1

LNT2

LNTI
The Acknowledgments discussion below discusses the use of LNMAXIN, LNMAXOUT,
LNMAXOUTINCR, and LNMAXRETRY. The LAN Activity discussion below discusses
the use of LNT1, LNT2, and LNTI.
For descriptions of these attributes, see Section 14, Attributes for SNAX/XF and
SNAX/APN.
Acknowledgments
The PU attributes, LNMAXOUT, LNMAXIN, LNMAXOUTINCR, and LNMAXRETRY are
used, optionally, to control windowing of information frames. The window sets the
number of frames that may be sent before an acknowledgment is required. The
defaults are set low, typically in the range 1 to 127. Depending upon the traffic pattern
and types of applications running on your Token-Ring LAN, you may want to optimize
these values. For example, if there is light activity on the ring, the window can be small
(frequent acknowledgments); however, if you are running large file transfers, you may
prefer to increase the window size so that there are fewer acknowledgments adding to
traffic on the ring.
LNMAXOUT determines the Token-Ring window size for sending I-frames. This
parameter performs for Token-Ring configurations what the WINDOW parameter
performs for configurations other than Token-Ring. With Token-Ring, the WINDOW
parameter is not used.
LNMAXIN determines the Token-Ring window size for receiving I-frames.
LNMAXOUTINCR determines the increment value for the Token-Ring dynamic
windowing algorithm.
LNMAXRETRY specifies the maximum number of times an I-frame or S-frame can be
retransmitted.