How many hosts per subnet


 
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Special Forums IP Networking How many hosts per subnet
# 1  
Old 09-25-2010
How many hosts per subnet

What would be a realistic number of hosts in a 100BaseT network, before you have to start thinking on subnetting further?
Or in another words. How many hosts would you keep in the same broadcast domain?

In a 100BaseT network, with subnet 10.20.20.0/24, I could have 254 hosts as part of the same broadcast domain, would that be considered too many hosts "chatting" among them?

I would like to know what people that maintain networks would recommend.
# 2  
Old 09-25-2010
That really depends on network traffic.

Posted from my Android phone.
# 3  
Old 10-01-2010
Quote:
Originally Posted by Neo
That really depends on network traffic.
Understandable! However I was under the impression that the hosts of a segment would be constantly broadcasting among them even if not much is actually "user generated traffic". Do I have the wrong impression?

Nevertheless, I wish to not miss the opportunity to ask you: by what rules could I come to the conclusion that the network is heavy on traffic?
Other than, "... hey, the network seems slow"

Would you mind to elaborate a bit?

Last edited by Aia; 10-01-2010 at 01:18 AM..
# 4  
Old 10-01-2010
Quote:
Originally Posted by Aia
Understandable! However I was under the impression that the hosts of a segment would be constantly broadcasting among them even if not much is actually "user generated traffic". Do I have the wrong impression?
Whether their traffic is all or even mostly broadcast depends entirely on what they're doing. If something's spewing broadcast video or disk images etc. to the network you'll obviously have a lot of broadcast. If you've got a hundred people running web browsers the traffic will be almost all non-broadcast. (Yes, there will be little bits of broadcast all the time, ARP requests and DHCP traffic and service announcements and all that, but these shouldn't amount to much.) Lacking my crystal ball, I really can't say whether you can put that many hosts on a subnet for what they're doing.
Quote:
Nevertheless, I wish to not miss the opportunity to ask you: by what rules could I come to the conclusion that the network is heavy on traffic?
The amount of available bandwidth versus the amount of used bandwidth, both between hosts and upstream/downstream.

Last edited by Corona688; 10-01-2010 at 12:31 PM..
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