Yes we are using RSM for routing need.
And I am not sure if we are using vlan because
cat5500, and DHCP is out of my control. How can I
verify if we are using vlan?
It seems to me that we are using vlan because more
than one subnet sits on the same physical edge switch,
witch I am sure if it is correct way to verify if we
are using vlan.
I will appreciate your help
jw
--- Kevin Wigle <[EMAIL PROTECTED]> wrote:
> 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.
>
> hmmm....... "connects to a Cisco Catalyst 5500 for
> our routing needs."
>
> How is the 5500 doing routing? Do you have vlans
> and a RSM (or MSFC)
> installed?
>
> Is there a real router here somewhere that is
> actually taking packets from
> one network and putting them on another? Are all
> the router interfaces 100
> mbit?
>
> DHCP is out of your control? I'm afraid it sounds
> like you have bigger
> problems (layer 8). If whoever is doing this
> migration can't the DHCP I
> can't imagine how the project can succeed.
>
> You're giving us info little by little but still not
> enough to see your
> network.
>
> If you see good performance on a local subnet and
> degraded performance
> crossing subnets then whatever is between them is a
> bottleneck. Normally a
> Cat5500 shouldn't be that bottleneck especially if
> it's doing the routing
> (with a RSM/MSFC).
>
> Can you elaborate on how traffic is getting from one
> subnet to another?
>
> Kevin Wigle
>
> ----- Original Message -----
> From: "jeongwoo park" <[EMAIL PROTECTED]>
> To: "Groupstudy" <[EMAIL PROTECTED]>
> Sent: Wednesday, 08 November, 2000 17:13
> 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
>
>
__________________________________________________
Do You Yahoo!?
Thousands of Stores. Millions of Products. All in one Place.
http://shopping.yahoo.com/
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
