574 | Interfaces
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If two RPMs are installed in your system, use the show redundancy command to display which RPM is 
the Primary RPM. 
Related
Commands
interface null
c e s
Configure a Null interface on the switch.
Syntax
interface null number
Parameters
 
Defaults
Not configured; number = 0
Command Modes
CONFIGURATION
Command
History
Example
Figure 23-8.  interface null Command Example 
Usage
Information
You cannot delete the Null interface. The only configuration command possible in a Null interface is ip 
unreachables.
Related
Commands
 
management route Configure a static route that points to the Management interface or a 
forwarding router.
duplex (Management) Clear FIB entries on a specified line card.
speed (Management interface) Clear FIB entries on a specified line card.
number
Enter zero (0) as the Null interface number.
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
Version 6.4.1.0 Introduced
FTOS(conf)#interface null 0
FTOS(conf-if-nu-0)#
interface Configure a physical interface.
interface loopback Configure a Loopback interface.
interface port-channel Configure a port channel.
interface vlan Configure a VLAN.
ip unreachables Enable generation of ICMP unreachable messages.