Web Management Guide-R02

Chapter 13 | Basic Administration Protocols
Ethernet Ring Protection Switching
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◆ One VLAN must be added to an ERPS instance as the CVLAN. This can be
designated as any VLAN, other than the management VLAN. The CVLAN should
only contain ring ports, and must not be configured with an IP address.
ERPS Global
Configuration
Use the Administration > ERPS (Configure Global) page to globally enable or
disable ERPS on the switch.
Parameters
These parameters are displayed:
◆ ERPS Status – Enables ERPS on the switch. (Default: Disabled)
ERPS must be enabled globally on the switch before it can enabled on an ERPS
instance (by setting the Status on the Configure Instance – Configure Details
page).
◆ ERPS Node ID – A MAC address unique to the ring node. The MAC address
must be specified in the format xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx. (Default:
CPU MAC address)
The ring node identifier is used to identify a node in R-APS messages for both
automatic and manual switching recovery operations.
For example, a node that has one ring port in SF condition and detects that the
condition has been cleared, will continuously transmit R-APS (NR) messages
with its own Node ID as priority information over both ring ports, informing its
neighbors that no request is present at this node. When another recovered
node holding the link blocked receives this message, it compares the Node ID
information with its own. If the received R-APS (NR) message has a higher
priority, this unblocks its ring ports. Otherwise, the block remains unchanged.
The node identifier may also be used for debugging, such as to distinguish
messages when a node is connected to more than one ring.
Web Interface
To globally enable ERPS on the switch:
1. Click Administration, ERPS.
2. Select Configure Global from the Step list.
3. Mark the ERPS Status check box.
4. Set the ERPS Node ID or leave it as the CPU MAC address.
5. Click Apply.