Re: subnetting
- From: Trendkill <jpmason@xxxxxxxxx>
- Date: Mon, 21 Jul 2008 11:47:48 -0700 (PDT)
On Jul 21, 2:25 pm, mmark751969 <mmark751...@xxxxxxxxx> wrote:
we have a 400 node network running on multple 3750 stackable switches
at access layer and a 6509 at the core. We are talking about
subnetting the network. 8 different subnets have been proposed. I
agree that vlan subnetting has it's advantages(i.e reducing broadcast
domains). But i am wondering at what point it's too much. Or what is
the drawback of having too many subnets and would 8 be considered that
on a 400 node network. Thanks
It all depends on the nature of the traffic. If these are all user
stations, I have seen many times where a /22 is used (1000+
addresses), and 4-500 are active during regular usage. If its a mixed
use vlan with real-time traffic (such as video or voice, which would
not be good architecture anyway), then subnetting to smaller subnets
makes more sense. In short, 8 segments for 50 nodes each is
overkill. I would personally not do smaller than /25, and /24 in most
cases, unless of course the network is a retail or small site network
which will never get larger than that space, or there are special vlan
or traffic requirements. When you are talking modern gig speed
networks, broadcast traffic is minimal unless you have an issue (ie
bad worm or virus), or a network design problem.
.
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