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VLSM Question

Mohd Suhaimi
Level 1
Level 1

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

6 Replies 6

Mohd Suhaimi
Level 1
Level 1

Edit on the requirements:

Require:

1) 6 hosts in each 7 subnets

2) 2 hosts in each 6 subnets

Thanks

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

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

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

Hi Jon,

Thanks for referencing me even if I did nothing on this post 

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

 

I'm getting old.

Apologies Reza, my mistake.

Jon