IBM SC30-3681-08 N2-max-retry, N3-framesrcvd-before-ack, Rw-receive-window, Nw-acks-to-inc-ww

Con®guring LLC

Set

Use the set command to con®gure the LLC.

Attention: Changing LLC parameters from the defaults can affect how the LLC protocol works.

Syntax:
set	n2-max-retry count
	n3-frames-rcvd-before-ack count
	nw-acks-to-inc-window count
	rw-receive-window count
	t1-reply-timer seconds
	t2-receive-ack-timer seconds
	ti-inactivity-timer seconds
	tw-transmit-window count

n2-max-retry

The maximum number of retries by LLC protocol. For example, N2 is the maximum number of times the LLC transmits an RR without receiving an acknowledgment when the inactivity timer expires. Default is 8. Minimum is 1. Maximum is 127.

Example:

set n2-max-retry

Max Retry value (N2) [8]?

n3-frames_rcvd-before-ack

This value is used with the T2 timer to reduce acknowledgment traffic for received I-frames. Set this counter to a speci®ed value. Each time an I-frame is received, this value decrements. When this counter reaches 0 or the T2 timer expires, an acknowledgment is sent. Default is 1. Minimum is 1. Maximum is 255.

Example:

set n3-frames_rcvd-before-ack

Number I-frames received before sending ACK(N3) [1]?

rw-receive-window

Indicates the maximum number of unacknowledged sequentially numbered I-frames that an LLC can receive from a remote LLC peer. This value must be equal to or less than 127.

Example:

set rw-receive-window

Receive Window (Rw), 127 Max. [2]?

nw-acks-to-inc-ww

This ®eld is set to a default value of 1.

t1-reply-timer

This timer expires when the LLC fails to receive a required acknowledgment or response from the other LLC station. When this timer expires, an RR is sent with the poll bit set and T1 is started again. If the LLC receives no response after the con®gured maximum number of retries (N2), the link underneath is declared inoperative. Default is 1. Minimum is 1. Maximum is 256.

Chapter 17. Con®guring and Monitoring LLC Interfaces 237