Subnetting

[24giovanni]

Could someone please tell me if this is correct if I had a Class C Address of 215.135.35.0 and divided 16 sub networks, would the following be correct?

215.135.35.0
215.135.35.16
215.135.35.32
215.135.35.48
215.135.35.64
215.135.35.80
215.135.35.96
215.135.35.112
215.135.35.128
215.135.35.144
215.135.35.160
215.135.35.176
215.135.35.192
215.135.35.208
215.135.35.224
215.135.35.240

Please let me know. I appreciate any help.

TIA

[24giovanni]

Can I please get an answer?

[24giovanni]

215.135.35.1
215.135.35.2
215.135.35.3
215.135.35.4
215.135.35.5
215.135.35.6
215.135.35.7
215.135.35.8
215.135.35.9
215.135.35.10
215.135.35.11
215.135.35.12
215.135.35.13
215.135.35.14


And it is impossible to have anything else as a subnet, right? The limit is 14 of them, right?

or is this right

215.135.35.16
215.135.35.32
215.135.35.48
215.135.35.64
215.135.35.80
215.135.35.96
215.135.35.112
215.135.35.128
215.135.35.144
215.135.35.160
215.135.35.176
215.135.35.192
215.135.35.208
215.135.35.224
215.135.35.240
215.135.35.256

Thanks for the help. I appreciate it.

[24giovanni]

May I ask why i can't get a reply please?

[jlreich]

May I ask why i can't get a reply please?
Well for one it hasn't even been 24 hours yet. I would wait at least that long before bumping the thread. ;)

Also the right person to answer your question obviously hasn't come across your thread yet. Subnetting can get complicated. I am still trying to get my head completely wrapped around it myself. But I ill try to answer your questions.

First I am not exactly certain of what your are asking.

You can have as many subnets up to the point of having one host on each subnet. Which would be pointless really, but you can.

To get your subnet mask address you add the value of the value left most bits that you take from the host bits. The last octet of the IP addresses for each subnet will fall on either side of the subnet mask, depending on how many subnets you divide it into.

Like I said I am still trying to get my head wrapped around this so I may have some errors in what I said. Also if you can give a little more explanation on exactly what you want to know I can perhaps give a better answer.

[24giovanni]

not blaming you or anyone but most forums answer questions in less than 24 hours.

[jlreich]

Often times they do get answered very quickly, but sometimes it takes awhile. And like I said subnetting can get complicated, so not everyone around here can answer questions about it. Some of the networking gurus we have around here don't get a chance to get on all the time.

Also like I said if you would like to be more specific on what your are trying find out, I will see if I can help. At least until someone more qualified gets a chance have a look at it. :)

[Jiggy]

Give this site http://www.firewall.cx/ip-subnetting-intro.php a read, also read through this section of the site - The Subnet Mask Bits, I think this is what your after.

[juniper]

You can have as many subnets up to the point of having one host on each subnet. Which would be pointless really, but you can.

This is actualy done quite alot when configuring stuff like OSPF to Force DR and BDR election and in BGP peering for load balancing/redundancy used on the loopback interfaces since they never go down. I beleive EIGRP (been awhile) will actualy put a /32 mask on any address in the loopback as anything bigger is useless anyway. ("reverse telnet" is another reason). But we are now talking VLSM (variable length subnet masking, subneting a subnet if you will) also very good practice to take point to point links down to 2 usable so you dont waiste addresses but then you need to have the subnets flow down thru the routers so they can be aggregated at the head end routers which takes us to CIDR (classless inter domain routing).

Can I please get an answer?

Yes you are correct on first post.