IBM SC30-3865-04 User Manual

Page 72

7. If the attempt to reach the primary DLUS is unsuccessful, attempt to reach

the backup DLUS.

Example:

– Assume the following parameter values:

Delay before initiating retries = 120 sec

Perform short retries to restore disrupted pipe = yes

Short retry timer = 60 sec

Short retry count = 2

Perform long retries to restore disrupted pipe = yes

Long retry timer = 300 sec

– Pipe activation fails.

– Wait 120 seconds (the value of

Delay before initiating retries).

– Retry the primary DLUS and, if this fails, retry the backup DLUS.

– If retry fails, wait 300 seconds (the value of

Long retry timer), retry the primary

DLUS,and if this retry fails, retry the backup DLUS.

– If retries fail, continue to retry the primary and backup DLUS, waiting 300

seconds between retry sequences, for as long as the DSPU is requesting
ACTPU.

For all other cases of pipe failure, DLUR will try the primary DLUS and then the
backup DLUS immediately. If this fails, DLUR will:

1. Wait for the amount of time specified by the minimum of the

short retry timer

and the

Delay before initiating retries parameters.

2. Attempt to reach the primary DLUS.

3. If the attempt to reach the primary DLUS is unsuccessful, attempt to reach

the backup DLUS

4. If pipe activation continues to fail, DLUR will retry as described in steps 1 - 3

for the number of times specified in the

short retry count.

If the

short retry count is exhausted, DLUR will retry as defined in steps 5 - 7

as long as the DSPU is requesting ACTPU.

5. Wait for the amount of time specified by the

Long retry timer

Note: If

Perform long retries to restore disrupted pipe is No, no further retries

will be attempted.

6. Attempt to reach the primary DLUS.