Learning by Doing: CISCO Certified Network ... - SCN Research

Objective:
To learn how to implement VLSM in subnet design.
Paper Lab: Variable Length Subnet Masking (VLSM)
Background:
When designing networks it is preferable to be as efficient as possible when assigning IP
addresses. As we have seen in previous labs sometimes we even need to use contiguous
(sequential) numbers for our subnet schemes. As your skills in networking and
networking design increase you will need to know how to efficiently utilize VLSM (RFC
1219).
Tools and Materials:
Paper and pencils
Super VLSM chart (http://www.henninger.net/downloads/ccna/tools/subnettable.pdf)
Lab Diagram:
to: IT HQ
(servers: 2 IP’s)
(24 IP’s)
(39 IP’s)
(57 IP’s)
(6 IP’s) (14 IP’s)
(12 IP’s) (28 IP’s)
Problems:
For the network diagrammed design an IP addressing scheme using VLSM to be as
efficient as possible with IP address distribution.
1. You have been assigned the class “C” private IP address by the upper-level IT
staff. Other divisions have other Class “C” IP addresses. For now, you only need
to know you have the 192.168.70.0/24 network to design.
2. You have been assigned the class “B” private IP address by the upper-level IT
staff. Other divisions have other Class “B” IP addresses. For now, you only need
to know you have the 172.168.128.0/18 network to design.
3. You have been assigned the class “A” private IP address by the upper-level IT
staff. Other divisions have other Class “A” IP addresses. For now, you only need
to know you have the 10.16.0.0/12 network to design.
Supplemental Lab or Challenge Activity:
If the router to HQ was used for DHCP could you set this network up with RIP and make
it work? Try it.
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