Seagate Fibre Channel Interface - Manual (Page 108)

94 Fibre Channel Interface Manual, Rev. D
9.2.11 Report Node Capabilities (RNC)
Report Node Capabilities (RNC) is sent to a target node to request that the node report on its capabilities. The
node does this by returning a list of specifications and the supported revision level of the specification.
Field definitions (listed alphabetically)
Capability Entries
There may be from zero to n number of capability entries (see the table below for the format of capability entries). The limit
is that the payload length can not be greater than 256 bytes.
Document Identifier
This number identifies the document. Valid document numbers range from:
01h through 05h
10h through 13h, and
20h through 27h
Flags
Bit 7 = 0 - report on this capability.
Bit 7 = 1 - Invalidate this capability selection.
Bit 6 = 1 - There is an extension on the capability entry. This is not supported. This bit must = 0.
Table 51: RNC Payload
Bit
Byte 7 6 5 4 3 2 1 0
0
LS Command Code
1
Reserved
2
(MSB)
3 Payload Length
(LSB)
4
RNC Flags
5
Reserved
6
Reserved
7
VU Information Length
8
.
.
15
Vendor Identifier - RNC Accept Payload only
16
Capability Entries
Table 52: Capability Entries
Bit
Byte 7 6 5 4 3 2 1 0
0
Flags
1
Document Identifier
2
Low Revision - RNC Accept Payload only
3
High Revision - RNC Accept Payload only
Table
number
51
52
52