Cisco – VLSM host ip address assigning

cisco

I am trying to assign addresses in the given topology but I am having overlapping problems whenever I try to assign addresses to the routers interfaces. I have included the table of sub netting I performed for the network. I am supposed to have one pc on each switch and assign it an address and gateway. Would any body be able to help me in relation to assigning addresses to each pc? Many thanks and I would be very grateful of any help

My Network
MyTable

Best Answer

For Net A you are using a /22, but the chart shows each network is a /24. A /22 would actually look like:

network id:  172.20.0.0
1st host:  172.20.0.1
last host:  172.20.3.254
broadcast:  172.20.3.255

What you listed is actually four different subnets:

172.20.0.0/24
172.20.1.0/24
172.20.2.0/24
172.20.3.0/24

You have a similar issue with Net B /23. Actual /23 network:

network id:  172.20.4.0
1st host:  172.20.4.1
last host:  172.20.5.254
broadcast:  172.20.5.255

For your /30 networks everything is correct except the broadcast addresses. Actual broadcasts:

172.20.7.0/30  =  172.20.7.3
172.20.7.4/30 = 172.20.7.7
172.20.7.8/30 = 172.20.7.11
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