H3C Technologies H3C S3100 Series Switches - Manual (Page 1027)

1-2
Ethernet OAMPDUs
Figure 1-1 shows the formats of different types of OAMPDUs.
Figure 1-1 Formats of different types of Ethernet OAMPDUs
The fields in an OAMPDU are described as follows:
Table 1-1 Description of the fields in an OAMPDU
Field Description
Dest addr
Destination MAC address of the Ethernet OAMPDU.
It is a slow protocol multicast address 0180c2000002. As slow protocol
packet cannot be forwarded by bridges, Ethernet OAMPDUs cannot be
forwarded.
Source addr
Source MAC address of the Ethernet OAMPDU.
It is the bridge MAC address of the sending side and is a unicast MAC
address.
Type
Type of the encapsulated protocol in the Ethernet OAMPDU.
The value is 0x8809.
Subtype
The specific protocol being encapsulated in the Ethernet OAMPDU.
The value is 0x03.
Flags Status information of an Ethernet OAM entity.
Code Type of the Ethernet OAMPDU
Throughout this document, a port with Ethernet OAM enabled is called an Ethernet OAM entity or an
OAM entity.
Table 1-2 shows the function of the three types of OAMPDUs.