03-03-2007 09:06 PM - edited 03-03-2019 04:00 PM
dear all, i got an an ip address 10.73.0.0 there is no specific subnet mask given, now for my h.o i need to get 256 diff subnetworks, and each subnet should be able to take 254 hosts. and i've 20 diff remote locations also.
so i want to utilise subnets from this 10.73.0.0 in these 20 location's, in one location there will be 3 vlans and hosts should be 128 no's. so for 20 locations say 20*3 = 60 subnets.
how can i achieve that thru subnetting.
i will rate all the posts.
03-03-2007 09:35 PM
Information:
Given IP Address = 10.73.0.0 (no subnet mask)
Head Office needed # of networks = 256
Head Office needed # of hosts per network = 254
Remote Locations = 20
Needed # of VLAN per Remote Location = 3
Needed # of hosts per VLAN in Remote Location = 128
Solution:
1. Proposed IP Address
10.72.0.0/15 = 10.72-73.0.0/16
2 Head Office IP Address
10.72.0.0/16 = 10.72.0-255.0/24
256 Subnets (/24 each) and 254 hosts per subnet
3. Remote Locations
10.73.0.0/18 = 10.73.0-63.0/24
64 Subnets (/24 each) and 254 hosts per subnet.
NOTE: We can't get exact 128 number of hosts per subnets, therefore we use /24 per subnet. /25 is maximum 126 hosts.
4. Spare Subnets
10.73.64.0/18
10.73.128.0/17
03-03-2007 09:47 PM
Dear medan,
thanks for your reply.
i can see that for H.O 10.72.0.0/16 is given, but i got only 10.73.0.0 address.
can you give the network address also for these.
03-03-2007 10:10 PM
Hi you mentioned that you were given an IP Address of 10.73.0.0 without subnet mask. Since you also need IP Address in remote locations, I assume that the subnet mask for 10.73.0.0 is not /16. However, if you want to use 10.73.0.0 in Head Office, just switch the two IP Address as in;
1. Proposed IP Address
10.72.0.0/15 = 10.72-73.0.0/16
2 Head Office IP Address
10.73.0.0/16 = 10.73.0-255.0/24
256 Subnets (/24 each) and 254 hosts per subnet
3. Remote Locations
10.72.0.0/18 = 10.72.0-63.0/24
64 Subnets (/24 each) and 254 hosts per subnet.
NOTE: We can't get exact 128 number of hosts per subnets, therefore we use /24 per subnet. /25 is maximum 126 hosts.
4. Spare Subnets
10.72.64.0/18
10.72.128.0/17
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide