Chapter 20
| ERPS Commands
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Command Mode
ERPS Configuration
Command Usage
â—† This switch can support up to six rings. However, ERPS control packets can only
be sent on one ring. This command is used to indicate that the current ring is a
secondary ring, and to specify the major ring which will be used to send ERPS
control packets.
â—† The Ring Protection Link (RPL) is the west port and can not be configured. So
the physical port on a secondary ring must be the west port. In other words, if a
domain has two physical ring ports, this ring can only be a major ring, not a
secondary ring (or sub-domain) which can have only one physical ring port.
This command will therefore fail if the east port is already configured (see the
ring-port command).
Example
Console(config-erps)#major-domain rd0
Console(config-erps)#
meg-level This command sets the Maintenance Entity Group level for a ring. Use the no form
to restore the default setting.
Syntax
meg-level level
level - The maintenance entity group (MEG) level which provides a
communication channel for ring automatic protection switching (R-APS)
information. (Range: 0-7)
Default Setting
1
Command Mode
ERPS Configuration
Command Usage
â—† This parameter is used to ensure that received R-APS PDUs are directed for this
ring. A unique level should be configured for each local ring if there are many R-
APS PDUs passing through this switch.
â—† If CFM continuity check messages are used to monitor the link status of an ERPS
ring node as specified by the mep-monitor command, then the MEG level set
by the meg-level command must match the authorized maintenance level of
the CFM domain to which the specified MEP belongs. The MEP’s primary VLAN
must also be the same as that used for the ERPS ring’s control VLAN.
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