Operation Manual – Ethernet OAM
H3C S9500 Series Routing Switches
Chapter 1 OAM Configuration
1-2
Table 1-1
Description of the fields in an OAMPDU
Field
Description
Value
Dest addr
Destination MAC address of the
Ethernet OAMPDU
Multicast MAC address
0180c2000002
Source addr
Source MAC address of the
Ethernet OAMPDU
The bridge MAC address
of the sending side
Type
Type of the encapsulated protocol in
the Ethernet OAMPDU
0x8809
Subtype
The specific protocol being
encapsulated in the Ethernet
OAMPDU
0x03
Flags
Information about an Ethernet OAM
entity
—
Code
Type of the Ethernet OAMPDU
0x00: Information
OAMPDU
0x01: Event notification
OAMPDU
0x04: Loopback control
OAMPDU
As mentioned above, Information OAMPDUs, Event Notification OAMPDUs, and
Loopback control OAMPDUs are commonly used, which are described as follows.
z
Information OAMPDUs are used for passing the state information about an
Ethernet OAM entity (including the information about the local device and remote
devices, and customized information) to another Ethernet OAM entity and
maintain OAM connections.
z
Event notification OAMPDUs are used for link monitoring. They are sent as an
alarm in case a failure occurs to the link connecting the local OAM entity and a
remote OAM entity.
z
Loopback control OAMPDUs are used for remote loopback control. By the
information in a Loopback control OAMPDU, you can enable/disable loopback on
a remote OAM entity.
1.1.2 OAM Connection Establishment
Following are the four OAM functions.
z
OAM connection establishment
z
Link monitoring
z
Remote fault detection
z
Remote loopback testing
Note that OAM connection is the base of all the other Ethernet OAM functions.