Lucent Technologies Stinger, Руководство администратора

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12-10 Stinger® Administration Guide
Diagnostic Testing
OAM testing
Table 12-1 lists the possible directions that the remote peer can specify and the
resulting action that the Stinger takes.
What happens when you start a continuity check locally
When you start a continuity check test using the oam command or the atm-oam
profile, the continuity check direction is set to A-to-B (Stinger generates continuity
check cells to the network peer). While the continuity check is set to A-to-B
direction, the Stinger unit accepts activate requests from the remote peer only if the
direction specified by the remote peer is B-to-A. The Stinger direction stays in the A-
to-B direction until you deactivate the test locally using the
oam command or the atm-
oam profile, at which point the direction reverts to default.
Deactivating a continuity check test
The continuity check remains active until one of the following events occurs:
You delete the cross connection.
The Stinger unit receives a request to deactivate the continuity check either
locally or from the remote. Consider the following situations:
– If you start a test by setting parameters in the atm-oam profile, you can stop
the test only by setting the appropriate parameters in that profile.
– If you start a continuity check using the oam -c|C + command, you can stop
the test only by using the oam -c|C - command.
– If a test was started by a network peer, the network peer can send a
deactivate request. You can also stop the test can by using the
oam -c|C -
command or by setting parameters in the
atm-oam
profile.
Whenever the continuity check direction is successfully reset to Default , (either
using the atm-oam profile or the oam -c|C ... - command), the R field displays NONE
before deactivation completes. Keep in mind that continuity check activation can
proceed only after the deactivation is completed, which in certain situations can be
up to 15 seconds. If you attempt to activate another continuity check using
oam -c|C
... + or the atm-oam profile before deactivation is completed, the system generates
the following error message:
Table 12-1. Direction specified by the remote peer and the results
Remote request
direction Result
A-to-B From the Stinger perspective, the B-to-A direction. The
network peer generates the continuity check cells. The
Stinger unit monitors continuity check cells.
B-to-A From the perspective of the Stinger unit, the A-to-B
direction. Stinger unit generates continuity check cells to the
network peer.
2-way Stinger unit monitors the continuity check cells generated by
the network peer. Stinger unit generates continuity check
cells to the network peer.