Technical data

28 Brocade 6910 Ethernet Access Switch Diagnostic Guide

53-1002348-02

Ethernet Ring Protection switching

The ITU G.8032 recommendation specifies a protection switching mechanism and protocol for

Ethernet layer network rings. Ethernet rings can provide wide-area multipoint connectivity and

redundancy more economically due to their reduced number of links. The mechanisms and

protocol defined in G.8032 achieve highly reliable and stable protection; and never form loops,

which would fatally affect network operation and service availability.

To configure Ethernet Protection Ring Switching (ERPS), follow the guidelines in the Brocade 6910

Ethernet Access Switch Configuration Guide. If you encounter any problems, use the following

show command to display a summary of the configuration settings and operational status for all

rings, or detailed information for a specific ring.

ERPS show commands

Syntax: show erps

Syntax: show erps [domain ring-name]

ring-name - Name of a specific ERPS ring. (Range: 1-32 characters)

This command displays the configuration settings and operational status of ERPS.

Console# show erps

ERPS Status : Enabled

Number of ERPS Domains : 1

Domain State MEL Enabled West East RPL Owner Ctrl VLAN

------------ ---------- --- ------- -------- -------- --------- ---------

rd1 Idle 0 Yes Eth 1/12 Eth 1/10 Yes 100

rd2 Protection 0 Yes Eth 1/3 Eth 1/4 No 200

This command displays detailed information for a specific ring.

Console#show erps domain rd1

Domain Name : rd1

Admin Status : Enabled

MEG Level : 1

Node ID : 00-12-CF-61-24-2F

Node State : Idle

West Port : Eth 1/ 1 (Blocking)

East Port : Eth 1/ 2 (Forwarding)

RPL Port : West

RPL Owner : Enabled

Holdoff Timer : 300 ms

Guard Timer : 300 ms

WTR Timer : 5 minutes

Control VLAN : 2

Propagate TC : Disabled

Connectivity Fault Management

Connectivity Fault Management (CFM) is an OAM protocol that includes proactive connectivity

monitoring using continuity check messages, fault verification through loop back messages, and

fault isolation by examining end-to-end connections between provider edge devices or between

customer edge devices.