Web Management Guide-R04

Table Of Contents
Chapter 13
| Basic Administration Protocols
Ethernet Ring Protection Switching
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Interface – The port or trunk attached to the west or east ring port.
Note that a ring port cannot be configured as a member of a spanning tree, a
dynamic trunk, or a static trunk.
Port State – Once configured, this field shows the operational state of the ring
ports for this node:
Blocking – The transmission and reception of traffic is blocked and the
forwarding of R-APS messages is blocked, but the transmission of locally
generated R-APS messages is allowed and the reception of all R-APS
messages is allowed.
Forwarding – The transmission and reception of traffic is allowed;
transmission, reception and forwarding of R-APS messages is allowed.
Unknown – The interface is not in a known state.
Local SF – Shows if a signal fault exists on a link to the local node.
Local FS – Shows if a forced switch command was issued on this interface.
Local MS – Shows if a manual switch command was issued on this interface.
MEP – Specifies the CCM MEPs used to monitor the link on a ring node.
If a MEP is used to monitor the link status of an ERPS node with CFM continuity
check messages, then the MEG Level parameter on this configuration page
must match the authorized maintenance level of the CFM domain to which the
specified MEP belongs. (See Configuring CFM Maintenance Domains” on
page 525.)
To ensure complete monitoring of a ring node, specify the CFM MEPs used to
monitor both the east and west ports of the ring node.
If CFM determines that a MEP node which has been configured to monitor a
ring port with this command has gone down, this information is passed to
ERPS, which in turn processes it as a ring node failure. For more information on
how ERPS recovers from a node failure, refer to the description of the Revertive
parameter on this configuration page.
RPL – If node is connected to the RPL, this shows by which interface.
Web Interface
To create an ERPS ring:
1. Click Administration, ERPS.
2. Select Configure Domain from the Step list.
3. Select Add from the Action list.