28 High Availability Software for the Intel® NetStructureTM ZT 4901 Technical Product Specification
System Management
The RH channel acts as a virtual channel that can respond to Alert Actions. This channel supports
IPMI commands like Alert Immediate:
•In the Alert Policy Table: Create an entry with a unique policy number, channel specified as
RH, destination specified as RH_CHAN_SET_ALL_MC_FD.
•In the Platform Event Filter Table: Create an entry with the Alert action selected, Alert Policy
Number defined as above, and the data mask specified based on the sensor thresholds to be
triggered.
4.2.3 IPMI RH Channel Commands
The following RH commands are present in the ZT 5524 processor board BMC firmware. These
are accessible only by sending the selected command/net function to the RH channel (0x05)

4.2.3.1 RH Channel Enabled

This IPMI command returns whether the board has RH features enabled or not. Conditions for non-
RH operation are: No IOX presence or the board is in a non-RH capable slot. Standard IPMI
completion codes are returned.
IPMI Command: RH_CHAN_ENABLED (0x00)
Net Function: INTEL_RH_SPECIFIC_REQUEST (0x36)
ByteData Fields

4.2.3.2 RH Channel Get RH BMC Address

This command gets the IPMB 1 address of the redundant host’s BMC. Standard IPMI completion
codes are returned.
IPMI Command: RH_CHAN_GET_RH_BMC_ADDR (0x05)
Net Function: INTEL_RH_SPECIFIC_REQUEST (0x36)
ByteData Fields
Table 2. RH Channel Alert Destinations
Destination # Description
0x00 RESERVED
0x01 RH_CHAN_SET_ALL_MC_FD (Sets CIC Fault Detection Lines)
0x02 RH_CHAN_CLEAR_ALL_MC_FD (Clears CIC Fault Detection Lines)
Request - -
Response 1 Completion Code
2 1h = RSS enabled
0h = RSS disabled