studying vlsm with cisco packet tracer

netcrazy88

Hi, i'm practicing for an exam using cisco packet tracer. I have a network ( 192.168.0.0/24 ) with 5 VLAN subnets, and various amounts of users. I believe the correct way to break these down is to go by most users to least. In this case I have 30, 14, 5, 5 and 2 users. So if I'm correct in this I will have subnet masks of /27, /28, /29, /29, and /30. this should support the amount of users without wasting IPs. Correct? [I'm using the Todd Lammle text for CCENT]. However, when I attempt to put my IP addresses in, I get an error message in packet tracer saying I have entered the incorrect IP address for this subnet. I am using 192.168.0.0 thru 192.168.4.0. Did I miss something?

Thanks

Feeling a little overwhelmed

EdTheLad

Subnets as follows, add 1 to 4th octet for first available host.

192.168.0.0/27
192.168.0.32/28
192.168.0.48/29
192.168.0.56/29
192.168.0.64/30

netcrazy88

Thanks ETL, but I feel like I'm missing something. You have increments of 8 in the fourth octet, but I'm not sure why. Could you elaborate please?

netcrazy88

Thank you EdTheLad. But I'm not sure how I messed up. I see you have increments of 8 in the fourth octet, however I'm not sure how you arrived at this. Could you elaborate? I feel as though I'm missing something. Or maybe I just need sleep. and need to begin again. Thank you once again

netcrazy88

Third time trying to reply. Thank you for your reply. However I feel I'm missing something. You have a block size of 8 in the fourth octet. How did you arrive at that please,?
thanks in advance

EdTheLad

netcrazy88 wrote: »

In this case I have 30, 14, 5, 5 and 2 users.

192.168.0.0/27 (30 users )
192.168.0.32/28 (14 users)
192.168.0.48/29 (5 users)
192.168.0.56/29 (5 users)
192.168.0.64/30 (2 users)

netcrazy88

i think i was so tired of looking at this, when i walked away and came back it was very apparent. right in front of me so to speak. thank you again