Wednesday 23 July 2014

Ethernet Operations, Administration, and Maintenance

Ethernet Operations, Administration, and Maintenance

This topic provides a top level view to help you effectively got wind of local area network Operations, Administration, and Maintenance (OAM) on a network of Juniper Networks® magnetic magnetic flux unit Series 3D Universal Edge Routers. For plenty of information concerning configuring OAM parameters on local area network interfaces, see the Junos OS Network Interfaces Library for Routing Devices.

Ethernet OAM provides the tools that network management software package package and network managers can use to envision but a network of local area network links is functioning. local area network OAM should:

Rely entirely on the media access management (MAC) address or virtual native house network (VLAN) image for troubleshooting.
Work severally of the actual local area network transport and performance over physical local area network ports, or a virtual service like pseudo wire, and so on.
Isolate faults over a flat (or single operator) description or a nested or hierarchical (or multi-provider) network.
OAM can supply straightforward link-level data, supply performance statistics, or track end-to-end property across the network. straightforward link fault management (LFM) for local area network links is printed in IEEE 802.3ah.

IEEE 802.1ag OAM is supported on un tagged, single labeled , and stacked VLAN interfaces.

Ethernet OAM functions area unit enforced as:

Fault detection and notification (provided by continuity check messages)
Path discovery (provided by the link trace protocol)
Fault isolation, verification, and recovery (isolation and verification area unit provided by a combination of protocols, whereas recovery is that the perform of protocols like spanning tree)
The loop back protocol utilized in local area network OAM is sculptured on the standard science ping. once a fault is detected, the loop back protocol performs fault verification and isolation at a lower place the direction of a network operator.

The loop back is performed mistreatment request and response message pairs. A uni cast loop back message is generated by a maintenance terminus (MEP), and a loop back reply is generated by the destination maintenance intermediate purpose (MIP) or MEP.

The target mackintosh address is learned by the continuity check protocol or link trace protocol. The loop back message's packet is commonly forwarded to a singular port by the originating MEP, as determined by a mackintosh table operation or the MEP interface mackintosh address.

The target MIP or MEP generates a uni cast loop back reply in response to the received loop back message. The loop back message follows identical path as a information packet, and intermediate bridges just forward the packet to the destination MIP or MEP.

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