8. THE CONCEPT OF MESSAGE CHANNEL
In IPMI v2.0, there are the channels as KCS, IPMB, LAN and Serial/Modem… etc. With the
help of message channel, now BMC could accept requests from remote clients and send response
messages back to other places far away. Because of security consideration, remote clients are required
to login before sending IPMI commands. Users from System Interface and IPMB are regarded as
local users. No user authentication is required for these two channels.
The following is a brief table of BMC supported channels. For detailed implementation of LAN and
Serial/Modem channels, refer to their respective chapters of IPMI v2.0 Spec. Please note that the
Serial/Modem channel is not supported in this implementation. The default system base address for
an I/O mapped KCS SMS Interface is CA2h. The detail information refers the IPMI v2.0 Spec.
KCS Interface Register:
Channel Number Protocol Type Medium Type Authentication type Access Mode
00h IPMB (01h) IPMB, I2C(01h) None Always available
01h IPMB (01h) 802.3 LAN (04h) MD2/MD5/Straight
Password
Always available
08h IPMB (01h) 802.3 LAN (04h) MD2/MD5/Straight
Password
Always available
0Fh KCS (05h) System I/F (0Ch) None Always available
S1 S0 OEM2 OEM1 C/D# SMS_ATN
IBF OBF
I/O address
Base+1
Base+1
Base+0
Base+0
Status
Command
Data in
Data out
To Next Page
Loading...