82598EB Datasheet, PDF (528/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Basic NC-SI Workflows
5.4.3.4.2.2 VLAN
NC-SI defines the following VLAN work modes:
Mode
Disabled
Enabled #1
Command and Name
Disable VLAN command
Enable VLAN command with VLAN only
Enabled #2
Enabled #3
Enable VLAN command with VLAN only + non-
VLAN
Enable VLAN command with Any-VLAN + non-
VLAN
Descriptions
In this mode, no VLAN frames are received.
In this mode, only packets that matched a VLAN
filter are forwarded to the MC.
In this mode, packets from mode 1 + non-VLAN
packets are forwarded.
In this mode, packets are forwarded regardless of
their VLAN state.
Refer to NC-SI specification - Enable VLAN command for further details.
The 82598EB only supports modes #1 and #3.
Recommendation:
1. Modes:
a. If VLAN is not required - use the disabled mode.
b. If VLAN is required - use the enabled #1 mode.
2. If enabling VLAN, The MC should also set the active VLAN ID filters using the NC-SI Set VLAN Filter
command prior to setting the VLAN mode.
5.4.3.5 Pass-Through Traffic States
The MC has independent, separate controls for enablement states of the receive (from LAN) and of the
transmit (to LAN) pass-through paths.
5.4.3.5.1 Channel Enable
This mode controls the state of the receive path:
1. Disabled: The channel does not pass any traffic from the network to the MC.
2. Enabled: The channel passes any traffic from the network (that matched the configured filters) to
the MC.
Note: This state also affects AENs: AENs is only sent in the enabled state.
The default state is disabled.
It is recommended that the MC complete all filtering configuration before enabling the
channel.
5.4.3.5.2 Network Transmit Enable
This mode controls the state of the transmit path:
1. Disabled - the channel does not pass any traffic from the MC to the network.
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