dividing a class C network into two subnets

in CCNA & CCENT
Hello,
Has anyone ever that if you divide the a class C network into two subnets the second subnet (255.255.255.12
that will cause problems in the network? I am not sure if I am expressing myself in a way that can be understood, but if anyone has heard about anything similar to that please let me know.
Thanks
Hitman0577
Has anyone ever that if you divide the a class C network into two subnets the second subnet (255.255.255.12

Thanks
Hitman0577
Comments
thats all that subnetting is about...
first network would start 1-126
second would be 129-254
No, my friend. I understand that. What I am refering to is the following question.:
Is there any cisco documentation that advises not to use the second subnet of a class C address that has been divided into two subnets. For example:
Subnet# Subnetmask Start End Broadcast
Address Address Address
1 255.255.255.128 200.10.44.1 200.10.44.126 200.10.44.127
2 200.10.44.129 200.10.44.254 200.10.44.255
is there anything that says in Cisco Documentation that advises not to use the second subnet that starts at 129 ip address?
Thanks for the reply.
1 255.255.255.128 200.10.44.1 200.10.44.126 200.10.44.127
2 200.10.44.129 200.10.44.254 200.10.44.255
sorry about all the garbage in the example above. Hopefully this comes out better.
1 200.10.44.1 200.10.44.126 200.10.44.127
2 200.10.44.129 200.10.44.254 200.10.44.255
sorry about all the garbage in the example above. Hopefully this comes out better.
I read in a book and saw something in a google group that said that the use of the .128 subnet is invalid (which I think not) and that same use could have an impact in security and bandwidth as well.
Something I had never heard before but it's out there to create some confusion on newbies like me.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080093f18.shtml#theallonesubnet
There is no problem with using it as long as you have no misconfigured equipment.
If you have sniffed, was there any particular type of traffic timing out, or was it random? One specific source/destination address? Any other exciting traffic (broadcast storms, p2p traffic, multi-user games, streaming video, etc) happening when the timeouts occur.