Steve,

I have a setup similar to yours. A pair of Switch 2000's with 100VG and
100BT fiber to various switching hubs, which then connect PC's, printers
and DTC's at 10Mb. The HP3000 is connected on a 10BT connection. This
works great. Even when the NT servers which are 100VG talk to the HP3000
the speed will just go to 10Mb.

John Zoltak
North American Mfg Co

> -----Original Message-----
> From: Steve BARRETT [SMTP:[log in to unmask]]
> Sent: Wednesday, April 29, 1998 3:57 PM
> To:   [log in to unmask]
> Subject:      [HP3000-L] HP3000 & Switched Network
>
> In a few months I will be migrating our central LAN backbone from
> ThinLan to a
> switched network using UTP cabling.  The network currently consist of
> the
> HP3000 with a BNC connection, an NT Web server with 10Base-T to a hub,
> a
> NetWare server with 100VG connected to a hub stack, and approximately
> 100
> networked PCs connected to either the 10Base-T stack or two 100VG
> stacks.  The
> 100VG stacks each use a SNMP/Bridge module to interface the 10Base-2
> shared
> media.
>
> The plan is to install an HP Switch 2000 with modules to handle the
> various
> media types.  The WAN interface will be DS3 ATM with a Catalyst 5000
> ATM
> Switch.  The LAN side of the Catalyst 5000 will be 100Base-T to the
> Switch
> 2000.
>
> Now, the bugaboo here is the 10Mb NI on the HP3000. Will the high
> speed
> conversational throughput provided by the switch 2000 completely
> overwhelm the
> HP3000's 10M NI? Will the NI require an upgrade to 100M? Based on
> previous
> HP3000-L threads it would seem that this isn't trivial. If the network
> is
> performing reasonablly well on the shared 10M media, is it safe to
> assume that
> it should perform well when connected at 10M to a switch?  Most of the
> traffic
> to the HP3K is OLTP.
>
> Any suggestions or sharing of experiences will be greatly appreciated.
>
> Thanks,
> Steve Barrett
>
>
>     Steven P. Barrett    [log in to unmask]
>     Systems Analyst
>     Fairfax County Public Library     (703) 222-3132 - Voice
>     Technical Operations Center       (703) 222-3135 - FAX
>     4000 Stringfellow Rd.
>     Chantilly, VA  20151
>
>     --- The opinions expressed here are mine alone . ---
>
>     If God had meant for us to have distributed systems, he
>     would have put little brains in our hands and in our
>     fingers.  (Unknown Author)