Edge-Core ECS3510-10PD, Руководство по управлению

Страница: 1109 / 1494

C
HAPTER
34
| ERPS Commands
– 1109 –
Figure 416: Non-ERPS Device Protection
When non-ERPS device protection is enabled on the ring, the ring ports
on the RPL owner node and non-owner nodes will not be blocked when
signal loss is detected by CCM loss events.
◆
When non-ERPS device protection is enabled on an RPL owner node, it
will send non-standard health-check packets to poll the ring health
when it enters the protection state. It does not use the normal
procedure of waiting to receive an R-APS (NR - no request) message
from nodes adjacent to the recovered link. Instead, it waits to see if the
non-standard health-check packets loop back. If they do, indicating
that the fault has been resolved, the RPL will be blocked.
After blocking the RPL, the owner node will still transmit an R-APS (NR,
RB - ring blocked) message. ERPS-compliant nodes receiving this
message flush their forwarding database and unblock previously
blocked ports. The ring is now returned to Idle state.
E
XAMPLE
Console(config-erps)#non-erps-dev-protect
Console(config-erps)#
non-revertive
This command enables non-revertive mode, which requires the protection
state on the RPL to manually cleared. Use the no form to restore the
default revertive mode.
S
YNTAX
[ no ] non-revertive
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
ERPS Configuration
C
OMMAND
U
SAGE
◆ Revertive behavior allows the switch to automatically return the RPL
from Protection state to Idle state through the exchange of protocol
messages.
Non-revertive behavior for Protection, Forced Switch, and Manual
Switch states are basically the same. Non-revertive behavior requires
non -E RPS
A
non -E RPS
RPL
Owner
RPL
X X
b l ocked b l ocked
fau l t
B C D E F