H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 116)

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• Blackhole type: A packet received on an interface is discarded. A complete configuration contains
an ID, which uniquely identifies an inline Layer 2 forwarding entry, and one interface.
The inline Layer 2 forwarding feature is supported on interfaces and subinterfaces.
Configuration procedure
Follow these steps to configure inline Layer 2 forwarding:
To do… Use the command… Remarks
Enter system view system-view —
Configure an inline Layer 2
forwarding entry inline-interfaces id [ blackhole |
reflect ]
Required
Enter Layer 2 Ethernet interface
view interface interface-type
interface-number
—
Assign an interface to the inline
Layer 2 forwarding entry
port inline-interfaces id
Required
By default, the interface does not belong
to any inline Layer 2 forwarding entry.
Two interfaces must be assigned to the
forward-type inline forwarding entry
while one interface is required for the
reflect or blackhole type.
CAUTION:
•
An interface can only belong to one inline forwarding entry, and the last configured port
inline-interfaces
id command on an Ethernet interface takes effect.
• Subinterfaces can be assigned to inline Layer 2 forwarding entries. To make these entries take effect, the
main interface must be assigned to the VLAN of which the ID is used as the subinterface number. For
example, if the subinterface GigabitEthernet 0/1.2 is assigned to an inline forwarding entry, the
interface GigabitEthernet 0/1 must be assigned to VLAN 2 so that the inline Layer 2 forwarding can be
implemented.
• If an interface and its subinterface are assigned to different inline forwarding entries, the forwarding
entry with the main interface takes precedence. For example, the interfaces GigabitEthernet 0/1 and
GigabitEthernet 0/2 are assigned to one inline forwarding entry, and the subinterfaces GigabitEthernet
0/1.2 and GigabitEthernet 0/2.3 are assigned to another forwarding entry; then the data received from
GigabitEthernet 0/1 is forwarded through the interface GigabitEthernet 0/2, and vise versa.
Displaying and maintaining inline Layer 2 forwarding
To do… Use the command… Remarks
Display inline Layer 2 forwarding
configuration
display inline-interfaces Available in any view