VLSM with focus on supernetting

[techtips]

Hey everybody, I am working on some examples of VLSM and limiting wasted addresses but keeping a focus on supernetting/route summarization.

Referring to the diagram below, R4 has 60 host and 120 hosts on two different ethernet connections.

I know with VLSM we want to make use of addresses efficiently and note waste, but in this example, would I combine 120 hosts + 60 hosts on R4 router for a total of 180 and VLSM based on 180 hosts?

We want to do supernetting/router summarization where we can on the network.

If I am not clear in my question, I will do my best to clear up any confusion.

Thank you!

 

[/usr/home]

120 hosts - /25 gives you 128-2=126 addresses

60 hosts - /26 gives you 64-2=62 addresses usable.

30 hosts - /27 gives you 30 addresses usable.

10 hosts - /28 gives you 14 addresses usable.

2 hosts - /30 gives you 2 usable addresses.

Ranges: network is 192.168.10.0 /24

10.0-10.127
10.128-10.191
10.192-10.223
10.224-10.239
10.240-10.243

10.244-10.247
10.248-10.255

Those last two are extra.

I'd recommend making them larger though. These ranges fulfill what you want but don't have any room for growth.