Configuring The Ethernet Local Management Interface; Configuring An Oam Protocol (Cfm); Assigning The Oam Protocol To An Evc - Juniper ACX1000 Configuration Manual

Configuring the Ethernet Local Management Interface

Copyright © 2017, Juniper Networks, Inc.
Chapter 34: Configuring Operations, Administration, and Management (OAM)
The E-LMI protocol on ACX Series routers supports Layer 2 circuit and Layer 2 VPN EVC
types and enables link-loss forwarding for pseudowire (Layer 2 circuit and Layer 2 VPN)
services as follows:
Interworking between the connectivity fault management (CFM) protocol and the
E-LMI protocol for Layer 2 circuit and Layer 2 VPN.
End-to-end CFM session between UNIs to monitor EVC status.
In the case of pseudowire redundancy, CFM can be used to monitor active and backup
pseudowire sessions. The EVC status is declared as down to CE devices only when
both the active and backup pseudowire sessions go down.
Interworking between remote defect indication (RDI) and E-LMI for Layer 2 circuit and
Layer 2 VPN.
If a maintenance association end point (MEP) receives an RDI bit set in a continuity
check message (CCM) frame, and if RDI fault detection is enabled in the EVC
configuration at [edit protocols oam ethernet evcs evc-id evc-protocol cfm
management-domain name management-association name faults rdi]
pseudowire is declared as down to CE routers through E-LMI.
If an end-to-end CFM session does not exist between UNIs, the pseudowire (Layer 2
circuit or Layer 2 VPN) up and down state triggers an asynchronous EVC state change
message to CE routers through E-LMI.
NOTE: ACX Series routers do not support E-LMI for Layer 2 services (bridging).
To configure E-LMI, perform the following steps:
Configuring an OAM Protocol (CFM) on page 1115
Assigning the OAM Protocol to an EVC on page 1115
Enabling E-LMI on an Interface and Mapping CE VLAN IDs to an EVC on page 1116

Configuring an OAM Protocol (CFM)

For information about configuring the OAM protocol (CFM), see IEEE 802.1ag OAM
Connectivity Fault Management Overview.

Assigning the OAM Protocol to an EVC

To assign an OAM protocol to an EVC, you must specify a name for the EVC by using the
evcs evc-id statement at the
the statement to
evc-protocol
options at the
[edit protocols oam ethernet evcs]
number of remote UNIs in the EVC by using the
value defaults to 1.
remote-uni-count
[edit protocols oam ethernet]
, , or to monitor the EVC status and its
cfm l2circuit l2vpn
hierarchy level. You can configure the
remote-uni-count number
, then the
hierarchy level. You can set
statement. The
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