82598EB Datasheet, PDF (421/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Pass-Through Multi-Port Modes
Note: The RCV_ALL bit must be cleared.
2. Receive All - all receive packets are routed to the BMC in this mode. It is enabled by setting the
RCV_TCO_EN bit (which enables packets to be routed to the BMC) and the RCV_ALL bit (which
routes all packets to the BMC) in the MANC register. RCV_ALL is only used for debug because it
blocks all host traffic.
The default mode is that every packet that is directed to the BMC is not directed to host memory. The
BMC enables 82598EB to direct certain manageability packets also to host memory by setting the
EN_MNG2HOST bit in the MANC register. It then needs to configure 82598EB to send manageability
packets to the host according to their type by setting the corresponding bits in the MANC2H register.
The BMC can control the types of packets that it receives by programming the receive manageability
filters. Following is the list of filters that are accessible to the BMC:
Filters
Functionality
Filters Enable
General configuration of the manageability
filters
Manageability to Host
Enables routing of manageability packets to
host
Manageability Decision
Filters [6:0]
Configuration of manageability decision filters
MAC Address [3:0]
Four unicast MAC manageability addresses
VLAN Filters [7:0]
Eight VLAN tag values
UDP/TCP Port Filters
[15:0]
16 destination port values
Flexible 128 bytes TCO
Filters [3:0]
Length values for four flex TCO filters
IPv4 and IPv6 Address
Filters [3:0]
IP address for manageability filtering
When Reset?
Internal_Power_On_Reset and FW Reset
Internal_Power_On_Reset and FW Reset
Internal_Power_On_Reset and FW Reset
Internal_Power_On_Reset
Internal_Power_On_Reset
Internal_Power_On_Reset
Internal_Power_On_Reset
Internal_Power_On_Reset
All these filters are reset only on Internal_Power_On_Reset. Register filters that enable filters or
functionality are also reset on FW reset. These registers can be loaded from the EEPROM following a
reset.
The high-level structure of manageability filtering is done in three steps:
1. Packets are filtered by L2 criteria (MAC address, unicast/multicast/broadcast).
2. Packets are then filtered by VLAN if a VLAN tag is present.
3. Packets are filtered by the manageability filters (port, IP, flex, other), as configured in the decision
filters.
Some general rules:
• Fragmented packets are passed to manageability but not parsed beyond the IP header.
• Packets with L2 errors (CRC, alignment, other) are never forwarded to manageability.
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