Switch User Manual

Conﬁguring SNA Ports 7-17

SNA Status and Conﬁguration

Retry Sequence Repeat Count

This Þeld speciÞes the number of times a retry sequence will be repeated for the

local SDLC link station. The default value for this parameter is 0.

RNR Limit

This speciÞes the length of time (in 1/100ths of a second) an SDLC link station

will allow its adjacent link station to remain in a busy (RNR) state before

declaring it inoperative. A value of 0 means there is no limit. The default value for

this parameter is 18000.

Group Poll Address

This Þeld deÞnes the group poll address for this link station. If group poll is not in

effect for this link station, the value should be 0.

Desired Operational State

This is the desired state of the SDLC station, Active or Inactive. The default value

for this parameter is Active.

Desired State at Startup

This is the desired state at startup of the SDLC station, Active or Inactive. The

default value for this parameter is Active.

Modulus

This parameter speciÞes the modulus for the SDLC link station. The modulus

determines the size of the rotating acknowledgment window used by the SDLC

link station pair. The default value for this parameter is 8.

Data Mode

Use this Þeld to specify whether communications mode with the adjacent link

station is Half (two-way alternate) or Full (two-way simultaneous). The default

value for this parameter is Half.

Support SIM, RIM Frames

This parameter determines whether the link station supports transmission and

receipt of Set Initialization Mode (SIM) and Request Initialization Mode (RIM)

control frames. The default value for this parameter is No.

Transmit-Receive Capabilities

This parameter controls the transmit-receive capabilities for this link station,

two-way alternating (twa) or two-way simultaneous (tws). The selected value

establishes the value of the transmit-receive capability indicator sent in the XID

image to the adjacent link station.