02-16-2014 06:34 PM - edited 03-10-2019 12:25 PM
Hi,
I have a VLSM question as follow:
The base address given is 10.1.0.0/23:
Required:
1) 6 hosts and 7 subnets
2) 2 hosts and 6 subnets
Can anyone help me out on this?
Thanks
02-16-2014 06:39 PM
Edit on the requirements:
Require:
1) 6 hosts in each 7 subnets
2) 2 hosts in each 6 subnets
Thanks
02-16-2014 06:58 PM
for 6 hosts in each subnet you can use multiple /29
example:
10.1.0.0/29 useable host 1-6
10.1.0.8/29 useable hosts 9-14
10.1.0.16/29 useable hosts 17-22
10.1.0.24/29 useable hosts 25-30
10.1.0.32/29 useable hosts 33-38
10.1.0.40/29 useable hosts 41-46
10.1.0.48/29 useable hosts 49-54
for 2 hosts you can use /30s
10.1.0.56/30
10.1.0.60/30
10.1.0.64/30
10.1.0.68/30
10.1.0.72/30
10.1.0.76/30
HTH
02-16-2014 07:32 PM
Thanks Reza for the quick reply. Just to double check that the second VLSM subnet is correct?
As from /29 (first subnet) to /30 (second subnet) there is only 1 bit change (below table the 30th bit) thus the valid range for second subnet can only be: 10.1.0.56/30 and 10.1.0.60/30.
10 | 1 | 0 | 56 | |
0000 1010 | 0000 0001 | 0000 0000 | 0011 1000 | 10.1.0.56/30 |
10 | 1 | 0 | 60 | |
0000 1010 | 0000 0001 | 0000 0000 | 0011 1100 | 10.1.0.60/30 |
Plaese advice.
Thanks
02-17-2014 04:10 AM
Not sure what you mean when you say -
thus the valid range for second subnet can only be: 10.1.0.56/30 and 10.1.0.60/30.
Alain's answer is correct, all the /30 subnets he has posted can be used.
Jon
02-17-2014 04:20 AM
Hi Jon,
Thanks for referencing me even if I did nothing on this post
Regards
Alain
Don't forget to rate helpful posts.
02-17-2014 04:24 AM
I'm getting old.
Apologies Reza, my mistake.
Jon
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