6 configuring a null interface, 1 establishing the configuration task, Applicable environment – Nortel Networks 8000 User Manual
Page 116: Preconfiguration tasks, Data preparation, Configuration procedures, 2 entering the null interface view, 5 configuring ce3 interfaces -20, 1 establishing the configuration task -23, 2 entering the null interface view -15
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Nortel Secure Router 8000 Series
Configuration -WAN Access
5 Logical interface configuration
Internet Address is 11.1.1.1/24
Physical is Loopback
Last 300 seconds input rate 0 bits/sec, 0 packets/sec
Last 300 seconds output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 drops
0 packets output, 0 bytes, 0 drops
5.6 Configuring a null interface
5.6.1 Establishing the configuration task
Applicable environment
The Null interface is like the null devices supported by certain operating systems. All packets,
which are sent to the Null interface, are dropped. The system creates a Null interface NULL0.
Since all packets sent to the Null interface are dropped, you can directly send packets to be
filtered out to the Null interface. In this case, you need not configure an ACL.
For example, using the following command discards all packets that are sent to the
192.101.0.0 network segment.
[Nortel] ip route-static 192.101.0.0 255.255.0.0 null 0
Preconfiguration tasks
Before configuring a Null interface, install and power on the router.
Data preparation
None.
Configuration procedures
No.
Procedure
1
Entering the null interface view
2
5.6.2 Entering the null interface view
Do as follows on the routers:
Step 1
Run:
system-view
The system view appears.
Step 2
Run:
interface null 0
Issue 5.3 (30 March 2009)
Nortel Networks Inc.
5-15