Junos® OS Ethernet Interfaces Configuration ... - Juniper Networks

Table 25: ETH-DM Frame Counts (continued)
Field Name
Valid DMRs received
Invalid DMRs received
Field Description
ETH-DM Frame Count Retrieval
Number of valid DMR frames received.
Stored in the CFM database of the MEP initiating a two-way frame delay measurement.
Number of invalid DMR frames received.
Stored in the CFM database of the MEP initiating a two-way frame delay measurement.
Each router counts the number of ETH-DM frames sent or received and stores the counts
in a CFM database.
Frame Counts Stored in CFM Databases
You can display ETH-DM frame counts for MEPs assigned to specified Ethernet interfaces
or for specified MEPs in CFM sessions by using the following operational commands:
• show oam ethernet connectivity-fault-management interfaces (detail | extensive)
• show oam ethernet connectivity-fault-management mep-database
maintenance-domain md-name maintenance-association ma-name
One-Way ETH-DM Frame Counts
For a one-way ETH-DM session, delay statistics are collected at the receiver MEP only,
but frame counts are collected at both MEPs. As indicated in Table 25 on page 258, one-way
ETH-DM frame counts are tallied from the perspective of each router in the session:
• At the initiator MEP, the router counts the number of 1DM frames sent.
• At the receiver MEP, the router counts the number of valid 1DM frames received and
the number of invalid 1DM frames received.
You can also view one-way ETH-DM frame counts—for a receiver MEP—by using the
show oam ethernet connectivity-fault-management mep-statistics command to display
one-way statistics and frame counts together.
Two-Way ETH-DM Frame Counts
For a two-way ETH-DM session, delay statistics are collected at the initiator MEP only,
but frame counts are collected at both MEPs. As indicated in Table 25 on page 258,
two-way ETH-DM frame counts are tallied from the perspective of each router in the
session:
Copyright © 2012, Juniper Networks, Inc.
• At the initiator MEP, the router counts the number of DMM frames sent, valid DMR
frames received, and invalid DMR frames received.
Chapter 14: Configuring ITU-T Y.1731 Ethernet Service OAM
• At the responder MEP, the router counts the number of DMR frames sent.
259