Ethernet Frame Addressing Format - Cisco MDS 9000 Installation And Configuration Note

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .

Ethernet Frame Addressing Format

This section describes fields in the Ethernet frame, after the adapter encapsulates the Fibre Channel
frame into an Ethernet frame. (See
Figure 10
The following list shows the fields of an Ethernet frame:
•
•
•
•
OL-9077-01
Fibre Channel Encapsulation
SOF
FC Frame
(Incl, EISL,
FC Header,
FC Payload)
CRC
EOF
Ethernet Destination Address—The 6-byte MAC address for the frame destination. A broadcast
EDA (FF:FF:FF:FF:FF:FF) is used and cannot be changed.
Ethernet Source Address—The 6-byte MAC address of the Ethernet port. It cannot be changed. The
source address is burned in at the factory.
Ethertype field—This field has the value 0x88AE.
Original packet length—The original packet length is measured in words and is a minimum of 12
words (36 bytes) and a maximum of 528 words (2112 bytes).
Cisco MDS 9000 Family Port Analyzer Adapter Installation and Configuration Note
Figure 10.)
DA
SA
Ethertype
SOF + VSAN
FC Frame
(Incl, EISL,
FC Header,
FC Payload)
FC CRC
Original Packet Length
EOF +
Eth CRC
Ethernet Frame Addressing Format
Broadcast Destination Address
Adapter's MAC Source Address
0x88AE (IEEE Assigned)
Start of Frame
Cyclic Redundancy Check
End of Frame + Error
Cyclic Redundancy Check
25