Technical Documentation
Related Documentation
- MX Series
- Ethernet Ring Protection
- Example: Configuring Ethernet Ring Protection for MX Series Routers
- Example: Viewing Ethernet Ring Protection Status—Normal Ring Operation
- Additional Information
- Ethernet OAM
Example: Viewing Ethernet Ring Protection Status—Ring Failure Condition
This section assumes that Ethernet ring protection is configuring correctly, that Router 1 is the ring protection link (RPL) owner, and that there is a link failure between Router 2 and Router 3 in the configuration example.
Router 1 Operational Commands (Ring Failure Condition)
user@router1> show protection-group ethernet-ring
aps Ethernet Ring Name Request/state No Flush Ring Protection Link Blocked pg101 SF NO No Originator Remote Node ID No 00:01:02:00:00:01
Note that the ring protection link is no longer blocked and the node is no longer marked as originator.
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 forwarding Yes
ge-1/2/4 ge-1/2/4.1 forwarding No
Signal Failure Admin State
Clear IFF ready
Clear IFF readyNote that the protection interface is now forwarding (so is the other interface).
user@router1> show protection-group ethernet-ring
node-state how protection-group ethernet-ring node-state Ethernet ring APS State Event Ring Protection Link Owner pg101 protected SF Yes Restore Timer Quard Timer Operation state disabled disabled operational
Note that Router 1 has recorded the span failure (SF).
user@router1> show protection-group ethernet-ring
statistics group-name pg101 Ethernet Ring statistics for PG pg101 RAPS sent : 1 RAPS received : 1 Local SF happened: : 0 Remote SF happened: : 1 NR event happened: : 0 NR-RB event happened: : 1
Note that the R-APS messages have recorded the remote failure.
Under a failure condition, the other routers on the ring (Router 2 and Router 3) will see the following similar output:
Router 2 and Router 3 Operational Commands (Failure Condition)
user@router2> show protection-group ethernet-ring
aps Ethernet Ring Name Request/state No Flush Ring Protection Link Blocked pg102 SF No No Originator Remote Node ID Yes 00:00:00:00:00:00
Note the failure event (SF). 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 discarding No
Signal Failure Admin State
Clear IFF ready
set IFF readyNote that the failed interface (ge-1/0/2.1) is not 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 : 1 RAPS received : 1 Local SF happened: : 1 Remote SF happened: : 0 NR event happened: : 0 NR-RB event happened: : 1
Note that the R-APS messages have recorded the remote failure. Router 3 will see almost identical information.
Related Documentation
- MX Series
- Ethernet Ring Protection
- Example: Configuring Ethernet Ring Protection for MX Series Routers
- Example: Viewing Ethernet Ring Protection Status—Normal Ring Operation
- Additional Information
- Ethernet OAM
