Example:Viewing Ethernet Ring Protection Status—Normal Ring Operation
Undernormal operating conditions,when Ethernet ring protection is configured correctly,
thering protection link (RPL) owner (Router 1 in the configurationexample) will see the
following:
Router1 Operational
Commands(Normal
RingOperation)
user@router1>show protection-group ethernet-ring aps
Ethernet Ring Name Request/state No Flush Ring Protection Link Blocked
pg101 NR No Yes
Originator Remote Node ID
Yes
Notethat the ring protection link is blocked and the node is markedas the originator of
theprotection.
user@router1>show protection-group ethernet-ring interface
Ethernet ring port parameters for protection group pg101
Interface Control Channel Forward State Ring Protection Link End
ge-1/0/1 ge-1/0/1.1 discarding Yes
ge-1/2/4 ge-1/2/4.1 forwarding No
Signal Failure Admin State
Clear IFF ready
Clear IFF ready
Notethat the protection interfaceis discarding while the other interface is forwarding.
user@router1>show protection-group ethernet-ring node-state
Ethernet ring APS State Event Ring Protection Link Owner
pg101 idle NR-RB Yes
Restore Timer Quard Timer Operation state
disabled disabled operational
Notethat Router 1 is the owner and timers are disabled.
user@router1>show protection-group ethernet-ring statisticsgroup-name pg101
Ethernet Ring statistics for PG pg101
RAPS sent : 1
RAPS received : 0
Local SF happened: : 0
Remote SF happened: : 0
NR event happened: : 0
NR-RB event happened: : 1
Notethat only minimal RAPS messages havebeen sent to establish the ring.
Undernormal operating conditions, the other routers on the ring (Router2 and Router
3)will see the following similar output:
Router2 and Router 3
Operational
user@router2>show protection-group ethernet-ring aps
Ethernet Ring Name Request/state No Flush Ring Protection Link Blocked
pg102 NR No Yes
Commands(Normal
RingOperation) Originator Remote Node ID
No 00:01:01:00:00:01
171Copyright© 2010, Juniper Networks,Inc.
Chapter13: Ethernet Ring Protection