Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
Dest MAC
Src MAC
Figure 109 Port Solver Message structure
TPID
TCI
Length
0xAA
0xAA
0x3
0x00
0x13
Submission page 236 UPA-OPERA
0x9D
0x02
The destination and source MAC addresses of the packets shall be filled as all the Port Solver messages: in the Dest
MAC, the Spanning tree MAC (0x0180C2000000), and in the src MAC the MAC address of the node that
originates the message.
The PSM message is extended to include also CapE messages. Therefore, it is used a special content for the INFO
field. Then, if a node detects a PSM with an INFO field with the bits 1 to 4 set to something different from zero, it
shall assume that the PSM includes also a CapE message.
The values of bits 1 to 4 of the INFO field and the message sent is shown in the following table:
Message INFO[4:1]
PSM without capabilities information 0x0
MAX_CAP_MSG 0x1
RUN_CAP_MSG 0x2
ACK_CAP_ANN 0x4
NACK_CAP_ANN 0x8
MAX_CAP_MSG+RUN_CAP_MSG 0x3
MAX_CAP_MSG+RUN_CAP_MSG+ACK_CAP_ANN 0x7
0x01
Source MAC
Destination MAC
Assigned LP
Info