APN Configuration and Management Manual

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Attributes for SNAX/XF and SNAX/APN

SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006

14-28

L3TIMEOUT

level 3 that the PU is inoperative. When -1 is specified or taken as the default, the PU

contact operation is retried indefinitely or until the PU is stopped, whichever occurs

first. (The INFO LINE command displays a -1 value of this parameter in its unsigned

form, 65535.)

The actions taken on a PU contact operation are different for primary and secondary

lines:



A primary line handler resends an SDLC SNRM command to a PU that fails to

respond or returns an SDLC DM response. The SNRM command is sent as a

result of a START PU command issued for a PU subordinate to a primary line.

The SNRM is retried at the interval specified for L3TIMEOUT. When the L3RETRY

limit is reached without receiving an SDLC UA response from the PU, level 3

declares the remote PU to be inoperative, and the PU’s status is changed from

STARTING to STOPPED.



For primary line handlers, the level-2 procedure resends the SNRM to the PU

RETRIES (LINE object attribute) times before notifying level 3 that the PU did not

respond positively. Therefore, observation of a line monitor attached to the primary

line during a PU’s failure to respond positively to SNRMs would reveal L3RETRY

number of RETRIES “bursts” of SNRMs separated by L3TIMEOUT pauses. The

SNRMs within the “bursts” are separated by TIMEOUT (LINE object attribute)

pauses.



A secondary line handler reissues a Read SIO to the hardware waiting for an

SDLC SNRM command from the host’s primary station. This action is repeated for

L3RETRY intervals of L3TIMEOUT.

L3TIMEOUT

L3TIMEOUT specifies the retransmit time-out value. This is the amount of time that the

level-3 procedure for a line-handler process waits between attempts to contact a either

a primary or secondary PU.

For PUs, the range of this attribute is from 0.01 to 5965:13:56.47 (a 32-bit value

representing hundredths of a second).

Default: 10 seconds

Value: 0.01 - 5965:13:56.47

Objects: PU