Ethernet Oam; Figure 3-13 Relationship Of Sub-Layers Of Oam In Iso/Iec Osi Reference Model - Zte ZXR10 5900E Product Description

ZXR10 5900E Product Description
router with high priority will work as the master router; if two routers have the same
priority, the one with bigger real IP address will be the master router.
Set IP address of the virtual router on the host in this broadcasting domain as network
gateway. When the master router breaks down, the slave router with the highest priority
will replace it and cause none influence to the host.
group work in abnormal condition, the host in this domain can not communicate outside
any more.
We classify these routers into multiple groups and make them backup each other. And
different IP addresses are used by the host in the domain as network gateway to realized
balanced load.

3.2.28 Ethernet OAM

3.2.28.1 802.3ah
IEEE 802.3ah mainly implements link level management, taking monitoring and failure
processing of point-to-point Ethernet link in the network. Sometimes "last mile detection"
is just about this. Link layer OAM is mainly applied for point-to-point direct link detection.

Figure 3-13 Relationship of sub-layers of OAM in ISO/IEC OSI reference model

Figure above is the location of OAM in ISO/IEC OSI reference model. Above OAM is LLC
logic link control or other MAC client layer. Below OAM is MAC layer or optional MAC
control sub-layer. OAM layer is optional. OAM covers the following three functions:

Remote discovery
56
Only if all routers in this VRRP
ZTE Confidential Proprietary