Juniper Networks JUNOS OS 10.4 - Manual (Page 198)

Router 1 Operational
Commands (Normal
Ring Operation) 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
Note that the ring protection link is blocked and the node is marked as the originator of
the protection.
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
Note that the protection interface is 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
Note that Router 1 is the owner and timers are disabled.
user@router1> show protection-group ethernet-ring statistics group-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
Note that only minimal RAPS messages have been sent to establish the ring.
Under normal operating conditions, the other routers on the ring (Router 2 and Router
3) will see the following similar output:
Router 2 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
Ring Operation)
Originator Remote Node ID
No 00:01:01:00:00:01
Router 3 will see almost identical information.
user@router2> show protection-group ethernet-ring interface
Ethernet ring port parameters for protection group pg102
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Junos OS 13.1 MX Series 3D Universal Edge Routers Solutions Guide