82598EB Datasheet, PDF (527/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Basic NC-SI Workflows
5.4.3.4.1 NC Capabilities Advertisement
NC-SI defines the Get Capabilities command. It is recommended that the MC use this command and
verify that the capabilities match its requirements before performing any configurations.
For example, the MC should verify that the NC supports a specific AEN before enabling it.
5.4.3.4.2 Receive Filtering
In order to receive traffic, the MC must configure the NC with receive filtering rules. These rules are
checked on every packet received on the LAN interface (such as from the network). Only if the rules
matched, will the packet be forwarded to the MC.
5.4.3.4.2.1 MAC Address Filtering
NC-SI defines three types of MAC address filters: unicast, multicast and broadcast. To be received (not
dropped) a packet must match at least one of these filters.
Note: The MC should set one MAC address using the Set MAC Address command and enable
broadcast and global multicast filtering.
Unicast/Exact Match (Set MAC Address Command)
This filter filters on specific 48-bit MAC addresses. The MC must configure this filter with a dedicated
MAC address.
Note:
The NC might expose three types of unicast/exact match filters (such as MAC filters that
match on the entire 48 bits of the MAC address): unicast, multicast and mixed. The 82598EB
exposes two mixed filters, which might be used both for unicast and multicast filtering. The
MC should use one mixed filter for its MAC address.
Refer to NC-SI specification - Set MAC Address for further details.
Broadcast (Enable/Disable Broadcast Filter Command)
NC-SI defines a broadcast filtering mechanism which has the following states:
1. Enabled - All broadcast traffic is blocked (not forwarded) to the MC, except for specific filters (such
as ARP request, DHCP, and NetBIOS).
2. Disabled - All broadcast traffic is forwarded to the MC, with no exceptions.
Note: Refer to NC-SI specification Enable/Disable Broadcast Filter command.
Global Multicast (Enable/Disable Global Multicast Filter)
NC-SI defines a multicast filtering mechanism which has the following states:
1. Enabled - All multicast traffic is blocked (not forwarded) to the MC.
2. Disabled - All multicast traffic is forwarded to the MC, with no exceptions.
The recommended operational mode is Enabled, with specific filters set.
Note: Not all multicast filtering modes are necessarily supported.
Refer to NC-SI specification Enable/Disable Global Multicast Filter command for further details.
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