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Example: Viewing Ethernet Ring Protection Status—Normal Ring Operation

Under normal operating conditions, when Ethernet ring protection is configured correctly, the ring protection link (RPL) owner (Router 1 in the configuration example) will see the following:

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 Commands (Normal Ring Operation)

user@router2> show protection-group ethernet-ring aps 
Ethernet Ring Name  Request/state  No Flush  Ring Protection Link Blocked
pg102               NR             No        Yes                        

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

Interface    Control Channel  Forward State  Ring Protection Link End 
ge-1/2/1     ge-1/2/1.1       forwarding     No                       
ge-1/0/2     ge-1/0/2.1       forwarding     No                       

Signal Failure  Admin State
Clear          IFF ready
Clear          IFF ready

Note that both interfaces are forwarding. Router 3 will see almost identical information.

user@router2> show protection-group ethernet-ring node-state 
Ethernet ring    APS State    Event         Ring Protection Link Owner 
pg102            idle         NR-RB         No                        

Restore Timer  Quard Timer  Operation state
disabled       disabled    operational

Note that Router 2 is not the owner. Router 3 will see almost identical information.

user@router2> show protection-group ethernet-ring statistics group-name pg102 
Ethernet Ring statistics for PG pg102
RAPS sent                        : 0
RAPS received                    : 1
Local SF happened:               : 0
Remote SF happened:              : 0
NR event happened:               : 0
NR-RB event happened:            : 1

Router 3 will see almost identical information.

 

Related Documentation

 

Published: 2012-11-26

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