Analysis and design of subnetting methods: Hybrid fixed length subnet masking (HFLSM)

By doing subnetting, network address can be broken down into several smaller subnets blocks to match the needs of the host address or subnet block. There are several known methods of subnetting ie VLSM and FLSM. In the application example in the case of this research, the results of the analysis indicate that the use of VLSM with a presentation method in terms of effective and efficient by 43% compared to the method of subnetting FLSM. With the same case will try to apply a new technique that is AFLSM. This technique is able to reduce the amount of wasted host better than VLSM, but this technique is not generic and can only be applied in certain cases. This technique also uses a subnet mask pattern is confusing and not in accordance with the standard value of CIDR. To overcome the shortcomings experienced by AFLSM, in this paper proposed a new technique that is HFLSM. HFLSM technique is a technique or a combination of the combined results VLSM and AFLSM. HFLSM techniques using pattern management IP addressing calculation as AFLSM but with a little addition of some rule. While the use of the subnet mask, this technique uses the pattern of use of VLSM subnet mask held that the use of subnet mask IP address will not overlap between the one with the other and the corresponding standard CIDR value. HFLSM more generic when compared with AFLSM, because the application of HFLSM can be done in several different instances. HFLSM also have reduced the ability of IP addresses are wasted or not used better than VLSM in a particular case.