Information Technology Reference
In-Depth Information
Decimal
CIDR
WAN
Network
Subnet
Subnet
First Usable
Last Usable
Broadcast
Link
Address
Mask
Mask
IP Address
IP Address
Address
SE-BR2 to
172.16.47.20
255.255.255.252
/30
172.16.47.21
172.16.47.22
172.16.47.23
SE-ST1
SE-BR2 to
172.16.47.24
255.255.255.252
/30
172.16.47.25
172.16.47.26
172.16.47.27
SE-ST2
Packet Tracer Companion: Challenge VLSM Calculation and
Addressing Design (6.4.2)
Packet Tracer
Companion
You can now open the file LSG02-Lab642.pka on the CD-ROM that accompanies this topic to repeat
this activity using Packet Tracer. Remember, however, that Packet Tracer is not a substitute for a
hands-on lab experience with real equipment. A summary of the instructions is provided within the
activity.
Activity 6-3: Troubleshooting a VLSM Addressing
Design (6.4.3)
Upon completion of this activity, you will be able to
Discover errors in a VLSM design
■
Propose solutions for VLSM design errors
■
Document the corrected VLSM assignments
■
Scenario
In this activity, the network address 172.16.128.0/17 has been used to provide the IP addressing for
the network shown in Figure 6-18. VLSM has been used to subnet the address space incorrectly. You
will need to troubleshoot the addressing that has been assigned for each subnet (see Table 6-10) to
determine where errors are present and then determine the correct addressing assignments, where
needed.
