Web Management Guide-R05

Table Of Contents
Chapter 13
| Basic Administration Protocols
Ethernet Ring Protection Switching
– 466
To show the configured ERPS rings:
1.
Click Administration, ERPS.
2.
Select Configure Domain from the Step list.
3.
Select Show from the Action list.
Figure 296: Showing Configured ERPS Rings
ERPS Forced and
Manual Mode
Operations
Use the Administration > ERPS (Configure Operation) page to block a ring port
using Forced Switch or Manual Switch commands.
Parameters
These parameters are displayed:
Domain Name
– Name of a configured ERPS ring.
Operation
– Specifies a Forced Switch (FS) or Manual Switch (MS) operation on
the east or west ring port.
Forced Switch
– Blocks specified ring port. (Options: West or East)
A ring with no pending request has a logical topology with the
traffic channel blocked at the RPL and unblocked on all other
ring links. In this situation, the FS command triggers protection
switching as follows:
a.
The ring node where an FS command was issued blocks the traffic
channel and R-APS channel on the ring port to which the
command was issued, and unblocks the other ring port.
b.
The ring node where the FS command was issued transmits R-APS
messages indicating FS over both ring ports. R-APS (FS) messages
are continuously transmitted by this ring node while the local FS
command is the ring nodes highest priority command (see
Table 31 on page 467). The R-APS (FS) message informs other ring
nodes of the FS command and that the traffic channel is blocked on
one ring port.