User Manual
UMN:CLI
V8102
209
Note the following points about manual-switch command.
- Ineffective in an existing forced-switch or signal failure (SF) condition
- Overridden by new forced-switch or SF conditions
- Multiple manual-switch commands cancel all manual-switch commands
In revertive operation, when the failure is recovered, the traffic channel resumes the use
of the recovered ring link only after the traffic channel has been blocked on the RPL. On
the other hand, in non-revertive operation, the traffic channel remains blocked on the re-
covered ring link and unblocked on the RPL even if the failure is recovered.
To specify a non-revertive or revertive mode, use the following command.
Command
Mode
Description
ethernet oam r-aps
<1-255>
non-
revertive
Global
Specifies a non-revertive mode.
no ethernet oam r-aps
<1-255>
non-revertive
Specifies a revertive mode.
7.7.19.4
Hold Off Time
When a link failure occurs, the nodes start Hold off timer. The nodes do not change its link
state until a hold off timer expires, to ensure that while the fault still exists, a link failure
state is maintained. After the timer expires, they send the Signal Fail (SF) frames. The
ring state is not changed from idle to protection state during the hold off time.
To specify hold-off time, use the following command.
Command
Mode
Description
ethernet oam r-aps
<1-255>
hold-off-time
<0-10000>
Global
Configures hold-off time
0-10000: hold-off time (default: 100ms, unit: millisec-
ond)
To configure hold-off time as default, use the following command.
Command
Mode
Description
no ethernet oam r-aps
<1-255>
hold-off-time
Global
Configures hold-off time as default value
7.7.19.5
Guard Time
If Node A and Node B detect the link failure being recovered, they send No Request (NR)
frames to RPL owner and starts a guard timer to keep the blocking status of the link re-
covered ports. To prevent ring nodes from receiving out dated R-APS messages, RPL
port of these nodes does not receive any frames from the external switches until this tim-
er has expired.
i
