RTL8111E-VC-CG View Datasheet(PDF) - Realtek Semiconductor
Part Name
Description
MFG CO.
RTL8111E-VC-CG
Realtek Semiconductor
'RTL8111E-VC-CG' PDF : 39 Pages View PDF
RTL8111E
Datasheet
6.8.2. Protocol Offload
Protocol offload is a task offload supported by Microsoft Windows 7. It is an entity that maintains
network presence for a sleeping higher power host. It prevents spurious wake up and further reduces
power consumption. It maintains connectivity while hosts are asleep, including responding to requests
from other nodes on the network, ignoring packets, generating packets while in the sleep state, and
intelligently waking up host systems.
6.8.3. RSS Operation
After the parameters are set, the RTL8111E will start hash calculations on each incoming packet and
forward each packet to its correct queue according to the hash result. If the incoming packet is not in the
hash type, it will be forwarded to the primary queue. The hash result plus the BaseCPUNumber will be
indexed into the indirection table to get the correct CPU number. The RTL8111E uses three methods to
inform the system of incoming packets: inline interrupt, MSI, and MSIX. Periodically the OS will update
the indirection table to rebalance the load across the CPUs.
6.9. Alert Standard Format (ASF)
ASF (Alert Standard Format) is a standard developed by the Pre-OS Working Group under DMTF
(Distributed Management Task Force). ASF helps network management through capabilities such as
system health monitoring, asset protection, and remote control.
IT departments have many choices regarding network management, but not all network management can
operate in low-power and OS-absent states. ASF allows IT managers to manage and access the managed
clients in an OS-absent environment.
From a technological point of view, an ASF managed client can provide advance warnings and system
failure indications to the remote management console. The Ethernet controller sits on the motherboard or
a plug-in network adapter card (NIC) in the local system. It collects information from various components
in the system, including the CPU, chipset, BIOS, and sensors on the motherboard. It sends collected
information to the management console running on a remote server.
6.9.1. Security-Extensions
RMCP Security-Extensions Protocol (RSP) provides integrity and anti-replay services for RMCP
messages. When RSP is used, an entire RMCP message is encapsulated in an RSP header and trailer.
• An RSP header is inserted between the UDP header and the RMCP header and its presence is
identified by the use of the RMCP security extensions UDP port number (0298h). The RSP header
contains two fields: Session ID and Sequence Number. A Session ID is an arbitrary number used to
identify the particular session state (algorithms, keys, etc). A Sequence Number is a unique
monotonically increasing number which is used for the 32-bit sliding window anti-replay mechanism.
• An RSP trailer is located following the end of the RMCP message’s Data block (i.e., security
extensions are applied above the UDP layer). An RSP trailer contains 4 fields: Pad, Pad Length, Next
Header, and Integrity Data. An integrity algorithm (e.g., HMAC-SHA1-96 defined in [RFC2404]) is
performed over the specific fields of the RSP Header, RMCP Message, and RSP trailer, the result is
placed in the Integrity Data field in the RSP trailer.
Integrated Gigabit Ethernet Controller for PCI Express
19
Track ID: JATR-2265-11 Rev. 1.5
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