Data Sheet

Ethernet Controller I210 —System Manageability
662
Table 10-10. Receive Control Byte
Field Bit(s) Description
RCV_EN 0
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 Flash 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 MC (also auto ARP packets).
RCV_ALL 1
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 MC. This flag
has no effect if bit 0 (Enable TCO packets) is disabled.
EN_STA 2
Enable Status Reporting.
0b: Disable status reporting.
1b: Enable status reporting.
EN_ARP_RES 3
Enable ARP Response.
0b: Disable the I210 ARP response.
The I210 treats ARP packets as any other packet, for example, packet is forwarded to the MC if it
passed other (non-ARP) filtering.
1b: Enable the I210 ARP response.
The I210 automatically responds to all received ARP requests that match its IP address.
The MC IP address is provided as part of the Receive Enable message (bytes 8:11). If a short
version of the command is used, the I210 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 I210 uses the IP address configured in the Flash as ARP Response IPv4 Address in
the pass-through LAN configuration structure.
If the CBDM bit is set, the I210 uses the MC dedicated MAC address in ARP response packets. If
the CBDM bit is not set, the MC uses the Host MAC address.
When the Enable ARP Response feature is activated, the I210 uses the following registers to filter
in ARP requests. MC should not modify these registers:
• Manageability Decision Filter – MDEF6 (and corresponding bit 6 in Management Only traffic
Register – MNGONLY).
• Fourth IPv4 Filter.
NM 5:4
Notification Method. Define the notification method the I210 uses.
00b: SMBUS Alert.
01b: Asynchronous notify.
10b: Direct receive.
11b: Not supported.
Reserved 6 Reserved. Must be set to 1b.
CBDM 7
Configure the MC Dedicated MAC Address.
Note: This bit should be 0b when the RCV_EN bit (bit 0) is not set.
0b: The I210 shares the MAC address for MNG traffic with the Host MAC address, which is specified
in Flash words 0x0-0x2.
1b: The I210 uses the MC dedicated MAC address as a filter for incoming receive packets.
The MC MAC address is set in bytes 2-7 in this command.
If a short version of the command is used, the I210 uses the MAC address configured in the most
recent long version of the command in which the CBDM bit was set.
When the dedicated MAC address feature is activated, the I210 uses the following registers to filter
in all the traffic addressed to the MC MAC. MC should not modify these registers:
Manageability Decision Filter – MDEF7 (and corresponding bit 7 in Management Only traffic
Register – MNGONLY) Manageability MAC Address Low – MMAL[3]
Manageability MAC Address High – MMAH[3]