LevelOne GTL-2881, Руководство пользователя

Страница: 473 / 706

Chapter 13
| Basic Administration Protocols
Ethernet Ring Protection Switching
– 473 –
c.
An ring node with a local manual switch command that receives an
R-APS message or a local request of higher priority than R-APS (MS)
clear its manual switch request. The ring node then processes the
new higher priority request.
■
Recovery for manual switching under revertive and non-revertive
mode is described under the Revertive parameter.
■
Clear – Manually clears the protection state which has been invoked by a
forced switch or manual switch command, and the node is operating under
non-revertive mode; or before the WTR or WTB timer expires when the
node is operating in revertive mode.
■
Two steps are required to make a ring operating in non-revertive mode
return to Idle state from forced switch or manual switch state:
1.
Issue a Clear command to remove the forced switch command on
the node where a local forced switch command is active.
2.
Issue a Clear command on the RPL owner node to trigger the
reversion.
■
The Clear command will also stop the WTR and WTB delay timers and
reset their values.
■
More detailed information about using this command for non-revertive
mode is included under the Revertive parameter. (See the Command
Usage section under
“ERPS Ring Configuration” on page 454 .)
Web Interface
To block a ring port:
1.
Click Administration, ERPS.
2.
Select Configure Domain from the Step list.
3.
Select Configure Operation from the Action list.
4.
Select the domain name from the drop-down list.
5.
Specify a Forced Switch, Manual Switch, or Clear operation.
6.
Click Apply.