Your problem seems to be insufficient hardware.
Supernetting five subnets and putting 500 stations on one segement will
cripple your network.
Duck
----- Original Message -----
From: jeongwoo park <[EMAIL PROTECTED]>
To: Groupstudy <[EMAIL PROTECTED]>
Sent: Wednesday, November 08, 2000 2:13 PM
Subject: Why not supernetting?
> Hi All,
>
> I am looking for advice on a LAN performance issue. i
> am running primarily NT4 and win2K boxes on a 100Mbit
> UTP Ethernet LAN.
>
> my servers are on static IPs on one subnet while my
> clients pick up DHCP addresses (assigned out of my
> control) in any one of half a dozen other subnets.
> file transfer and printing performance between client
> and server is averaging 1Mbit/sec when computers are
> in different subnets. switch the same two computers to
> static IPs in the same subnet and throughput jumps to
> a respectable 30-70Mbit/sec. i need to keep the
> clients on DHCP as i don't have enough static IPs to
> go around for the subnet the servers are in.
>
> all clients and servers are attached to one of 5
> Allied Telesyn 8126XL 24-port managed switches. all 5
> of these "edge" switches connect to another switch of
> the same model with a 100Mbit multi-mode (1300
> nanometer) fiber uplink which connects to a Cisco
> Catalyst 5500 for our routing needs.
>
> When the clients are on different subnets the file
> transfers appear to take a long trip through the
> router with a huge performance penalty (1Mbit/sec).
> when the client and server are on the same subnet the
> packets do NOT appear to be routed (perhaps they are
> handled using ARP?) and the performance is very good.
> ping response times on both switches and routers is
> under 20ms. This is where I believe supernetting could
> be a solution to this slowness, because I think
> supernetting allows me to put all stations in the same
> subnet, witch avoids routing needs.
>
> I got some responses to my previous post from people
> saying that supernetting would slow down the speed
> because there would be too many stations in big
> broadcast domain, which contradicts what I am willing
> to do.
>
> Am i missing some key concepts here that might improve
> my understanding of this tragic performance?
>
>
> any help would be greatly appreciated.
>
> take care,
>
> jw
>
>
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