Erps – Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) User Manual

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Brocade 6910 Ethernet Access Switch Configuration Guide

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ERPS Commands

3. Configure the RPL owner: Configure one node in the ring as the Ring Protection Link (RPL)

owner using the

rpl owner

command. When this switch is configured as the RPL owner, the

west ring port is set as being connected to the RPL. Under normal operations (Idle state), the
RPL is blocked to ensure that a loop cannot form in the ring. If a signal failure brings down any
other link in the ring, the RPL will be unblocked (Protection state) to ensure proper connectivity
among all ring nodes until the failure is recovered.

4. 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nodes from receiving outdated R-APS messages, the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.

5. 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.

6. 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

erps

command, no ERPS rings will work.

7. Enable an ERPS ring: Before an ERPS ring can work, it must be enabled using the

enable

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

enable

command.

8. Display ERPS status information: Use the

show erps

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