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VLSM Example. Solution Almerindo Graziano. VLSM: Interconnection Requirements. Interconnection Requirements In each town the buildings are interconnected via FDDI or Fast Ethernet Each country needs 3 x 4 = 12 addresses (nearest is 32)
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VLSM Example Solution Almerindo Graziano
VLSM: Interconnection Requirements • Interconnection Requirements • In each town the buildings are interconnected via FDDI or Fast Ethernet • Each country needs 3 x 4 = 12 addresses (nearest is 32) • Each country has a central site to which all the towns are connected via Frame Relay • Each country needs at least 3 addresses • The organization has a central site in Manchester to which all the central sites are connected via Frame Relay/Leased Lines
VLSM: Example • 143.52.110.0/24 can be subnetted for • Connections between buildings • at least 12 per country (Number of buildings may increase) • Serial connections • at least 4 per country (backup considerations)
VLSM: Example Country: 000 143.52.110.0/27 Ireland 001 143.52.110.32/27 Scotland 010 143.52.110.64/27 Wales 011 143.52.110.96/27 England 100 143.52.110.128/27 WAN connections 101 143.52.110.160/27 WAN connections 110 143.52.110.192/27 WAN connections 111 143.52.110.224/27 WAN connections 30 addresses for the buildings in each country
VLSM: Example WAN connections 111/000 143.52.110.224/30 Town1 /001 143.52.110.228/30 Town2 /010 143.52.110.232/30 Town3 /011 143.52.110.236/30 Town4 /100 143.52.110.240/30 to Manchester /101 143.52.110.244/30 for resiliance /110 143.52.110.248/30 for resiliance /111 143.52.110.252/30 for resiliance