HP 5820X Series User Manual

23
To do… Use the command… Remarks
4. Shut down the loopback
interface
shutdown
Optional.
By default, a loopback interface is
up once created.
5. Restore the default settings for
the interface
default Optional.
Configure settings such as IP addresses and IP routes on Loopback interfaces. For more information, see
the Layer 3—IP Services Configuration Guide and Layer 3—IP Routing Configuration Guide.
Null interface
A null interface is a completely software-based logical interface, and is always up. However, you cannot
use it to forward data packets or configure an IP address or link layer protocol on it. With a null interface
specified as the next hop of a static route to a specific network segment, any packets routed to the
network segment are dropped. The null interface provides a simpler way to filter packets than ACL. Filter
uninteresting traffic by transmitting it to a null interface instead of applying an ACL.
For example, by executing the ip route-static 92.101.0.0 255.255.0.0 null 0 command (which configures a
static route leading to null interface 0), you can have all packets destined to the network segment
92.101.0.0/16 discarded.
Only one null interface, interface Null 0, is supported on your switch. You cannot remove or create a null
interface.
Configuring null 0 interface
To enter null interface view:
To do… Use the command… Remarks
1. Enter system view
system-view —
2. Enter null interface
view
interface null 0
Required.
The Null 0 interface is the default null interface
on your switch. It cannot be manually created
or removed.
3. Set a description for
the null interface
description text
Optional.
By default, the description of an interface is
the interface name followed by the “Interface”
string.
4. Restore the default
settings of the
interface
default Optional.

HP 5820X Series Specifications

General

Brand	HP
Model	5820X Series
Category	Switch
Language	English