Configuring 802.3Ah Oam Link-Fault Management - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual

JunosE 11.3.x Link Layer Configuration Guide
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Configuring 802.3ah OAM Link-Fault Management

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fault/down event to be greater than two, and the high and low thresholds for an error
to be exceeded on an Ethernet OAM interface to be more than two seconds.
802.3ah OAM functionality is not supported on SRP Ethernet interfaces. Also, JunosE
Software does not support unidirectional operation of Ethernet OAM links, which enable
the OAM entities to send Link Fault Information OAM PDUs to the peer whenever a
receive path failure is detected. In addition, an active mode OAM entity can retrieve
and respond to the performance variables that it receives from its peer entity. However,
the local OAM entity does not send a list of such performance variables that it can
process from the peer.
OAM Feature Overview on page 230
Interrelationship of OAM Link-Fault Management with Ethernet Subsystems on page 236
Configuring 802.3ah OAM Link-Fault Management on page 238
Ethernet OAM link-fault management can be used for physical link-level fault detection
and management. It uses a new, optional sublayer in the data link layer of the OSI model.
Ethernet OAM can be implemented on any full-duplex point-to-point or emulated
point-to-point Ethernet link. A system-wide implementation is not required; OAM can
be deployed on particular interfaces of a router. Transmitted Ethernet OAM messages
or OAM PDUs are of standard length, untagged Ethernet frames within the normal frame
length limits in the range 64–1518 bytes.
To configure OAM link-fault management on an Ethernet interface:
Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet interface, and enable
1.
IEEE 802.3ah OAM support on the interface. When the IEEE 802.3ah OAM protocol
is enabled on a physical interface, the discovery process is automatically triggered.
The default discovery mode of a local interface is active.
host1(config)#interface GigabitEthernet 6/0
host1(config-if)#ethernet oam lfm
NOTE: You must enable the OAM link-fault management feature to be
able to configure parameters that govern the link monitoring and
management process.
All of the following steps are optional. You can choose which of the OAM
configurations you want to set up on the interface to enable link-fault
administration. If you enable OAM support on the interface without
specifying any of the other parameters, such as discovery mode and
threshold settings, default values are assumed for those attributes.
Specify whether the interface or the peer initiates the discovery process by configuring
2.
the link discovery mode to active or passive.
host1(config-if)#ethernet oam lfm mode active
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