IP Subnet-Zero
Written on 15:04 by Ahmet Emir
IP subnet-zero is not a new command, but in the past, Cisco courseware, and Cisco assay objectives,
didn’t awning it—but it absolutely does now! This command allows you to use the aboriginal and last
subnet in your arrangement design. For example, the Class C affectation of 192 provides subnets 64 and 128
(discussed thoroughly after in this chapter), but with the
ip subnet-zero
command, you now get
to use subnets 0, 64, 128, and 192. That is two added subnets for every subnet affectation we use.
Even admitting we don’t altercate the command band interface (CLI) until the abutting chapter,
“Cisco’s Internetworking Operating System (IOS) and Security Device Manager (SDM),” it’s
important for you to be accustomed with this command:
P1R1#
sh running-config
Building configuration...
Current agreement : 827 bytes
!
hostname Pod1R1
!
ip subnet-zero
!
This router achievement shows that the command
ip subnet-zero
is enabled on the router.
Cisco has angry this command on by absence starting with Cisco IOS adaptation 12.
x
.
When belief for your Cisco exams, accomplish abiding you apprehend actual anxiously and
understand if Cisco is allurement you
not
to use
ip subnet-zero
. There are
instances area this may happen.
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