Ethernet Oam Implementation - H3C S9500E Series Configuration Manual

Field
Dest addr
Source addr
Type
Subtype
Flags
Code
Table 5 shows the functions of the three types of OAMPDUs.
Table 5 Functions of different types of OAMPDU
OAMPDU type
Information OAMPDU
Event notification
OAMPDU
Loopback control
OAMPDU

Ethernet OAM implementation

This section describes the working procedures of Ethernet OAM.
Ethernet OAM connection establishment
Ethernet OAM connection is the basis of all other Ethernet OAM functions. OAM connection
establishment is also known as the Discovery phase, where an Ethernet OAM entity discovers
remote OAM entities and establishes sessions with them.
In this phase, interconnected OAM entities determine whether Ethernet OAM connections can be
established, by exchanging Information OAMPDUs to notify peers of their OAM configuration
information and the OAM capabilities of the local nodes. An Ethernet OAM connection can be
established only between entities that have matching loopback, link detecting, and link event
settings. After an Ethernet OAM connection is established, Ethernet OAM takes effect on it.
Description
Destination MAC address of the Ethernet OAMPDU.
It is a slow protocol multicast address 0180c2000002. Bridges cannot forward slow
protocol packets, so Ethernet OAMPDUs cannot be forwarded.
Source MAC address of the Ethernet OAMPDU.
It is the bridge MAC address of the sending side and is a unicast MAC address.
Type of the encapsulated protocol in the Ethernet OAMPDU.
The value is 0x8809.
The specific protocol being encapsulated in the Ethernet OAMPDU.
The value is 0x03.
Status information of an Ethernet OAM entity.
Type of the Ethernet OAMPDU
Function
Used for transmitting state information of an Ethernet OAM entity (including
information about the local switch and remote switches, and customized information)
to the remote Ethernet OAM entity, and maintaining OAM connections
Used by link monitoring to notify the remote OAM entity when it detects problems on
the link between.
Used for remote loopback control. By inserting the information used to
enable/disable loopback to a loopback control OAMPDU, you can enable/disable
loopback on a remote OAM entity.
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