CLI Reference Guide-R04

Chapter 21 | ERPS Commands
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will be unblocked (Protection state) to ensure proper connectivity among all
ring nodes until the failure is recovered.
6. Configure ERPS timers: Use the guard-timer command to set the timer is used
to prevent ring nodes from receiving outdated R-APS messages, the holdoff-
timer command to filter out intermittent link faults, and the wtr-timer
command to verify that the ring has stabilized before blocking the RPL after
recovery from a signal failure.
7. Configure the ERPS Control VLAN (CVLAN): Use the control-vlan command to
create the VLAN used to pass R-APS ring maintenance commands. The CVLAN
must NOT be configured with an IP address. In addition, only ring ports may be
added to the CVLAN (prior to configuring the VLAN as a CVLAN). No other ports
can be members of this VLAN (once set as a CVLAN). Also, the ring ports of the
CVLAN must be tagged. Failure to observe these restrictions can result in a loop
in the network.
8. Enable ERPS: Before enabling a ring as described in the next step, first use the
erps command to globally enable ERPS on the switch. If ERPS has not yet been
enabled or has been disabled with the no erps command, no ERPS rings will
work.
9. Enable ERPS rings and instances: Before an ERPS ring can work, it must be
enabled using the enable (ring) command and specific instances enabled using
the enable (instance) command. When configuration is completed and the ring
enabled, R-APS messages will start flowing in the control VLAN, and normal
traffic will begin to flow in the data VLANs. To stop a ring, it can be disabled on
any node using the no enable (ring) command.
10. Display ERPS status information: Use the show erps statistics command to
display general ERPS status information or detailed ERPS status information for
a specific ring.
erps This command enables ERPS on the switch. Use the no form to disable this feature.
Syntax
[no] erps
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
ERPS must be enabled globally on the switch before it can enabled on an ERPS ring
using the enable (ring) command.