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CHAPTER 10
IEEE 802.1ag OAM Connectivity-Fault
Management
•
Ethernet Operations, Administration, and Maintenance on page 103
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Ethernet OAM Connectivity Fault Management on page 104
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Example: Configuring Ethernet CFM over VPLS on page 105
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Example: Configuring Ethernet CFM on Bridge Connections on page 112
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Example: Configuring Ethernet CFM on Physical Interfaces on page 116
Ethernet Operations, Administration, and Maintenance
This topic provides an overview to help you effectively configure Ethernet Operations,
Administration, and Maintenance (OAM) on a network of Juniper Networks MX Series
Ethernet Services Routers. For more information about configuring OAM parameters on
Ethernet interfaces, see the Junos OS Network Interfaces Configuration Guide.
Ethernet OAM provides the tools that network management software and network
managers can use to determine how a network of Ethernet links is functioning. Ethernet
OAM should:
•
Rely only on the media access control (MAC) address or virtual local area network
(VLAN) identifier for troubleshooting
•
Workindependentlyof theactualEthernettransportand functionover physicalEthernet
ports, or a virtual service such as pseudowire, and so on.
•
Isolate faults over a flat (or single operator) network architecture or a nested or
hierarchical (or multi-provider) networks.
OAM can provide simple link-level information, provide performance statistics, or track
end-to-end connectivity across the network. Simple link fault management (LFM) for
Ethernet links is defined in IEEE 802.3ah.
Ethernet OAM functions are implemented as:
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Fault detection and notification (provided by continuity check messages)
•
Path discovery (provided by the linktrace protocol)
103Copyright © 2010, Juniper Networks, Inc.