82598EB Datasheet, PDF (445/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - SMBus Pass-Through Transactions
Table 5-4. Receive Control Byte (Data Byte)
Field
RCV_EN
RCV_ALL
EN_STA
Bit(s)
0
1
2
Description
Receive TCO Enable.
0b: Disable receive TCO packets.
1b: Enable Receive TCO packets.
Setting this bit enables all manageability receive filtering operations. Enabling specific
filters is done via the EEPROM or through special configuration commands.
Note: When the RCV_EN bit is cleared, all receive TCO functionality is disabled, not just
the packets that are directed to the BMC (also auto ARP packets).
Receive All Enable.
0b: Disable receiving all packets.
1b: Enable receiving all packets.
Forwards all packets received over the wire that passed L2 filtering to the external BMC.
This flag has no effect if bit 0 (Enable TCO packets) is disabled.
Enable Status Reporting.
0b: Disable status reporting.
1b: Enable status reporting.
EN_ARP_RES
3
NM
5:4
Enable ARP Response.
0b: Disable 82598EB ARP response.
The 82598EB treats ARP packets as any other packet, for example, packet is forwarded to
the BMC if it passed other (non-ARP) filtering.
1b: Enable the 82598EB ARP response.
The 82598EB automatically responds to all received ARP requests that match its IP
address. Note that setting this bit does not change the Rx filtering settings. Appropriate
Rx filtering to enable ARP request packets to reach the BMC should be set by the BMC or
by the EEPROM.
The BMC IP address is provided as part of the Receive Enable message (bytes 8-11). If a
short version of the command is used, the device uses IP address configured in the most
recent long version of the command in which the EN_ARP_RES bit was set. If no such
previous long command exists, then the 82598EB uses the IP address configured in the
EEPROM as ARP Response IPv4 Address in the pass-through LAN configuration structure.
If the CBDM bit is set, 82598EB uses the BMC dedicated MAC address in ARP response
packets. If the CBDM bit is not set, the BMC uses the host MAC address.
Notification Method. Define the notification method 82598EB uses.
00b: SMBUS Alert.
01b: Asynchronous Notify.
10b: Direct Receive.
11b: Not Supported.
Note: In dual SMBus address mode, both SMBus addresses must be configured with the
same notification method.
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