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FW: jeckyl hyde network
From: "crawford charles" <biv0uac17 () hotmail com>
Date: Thu, 17 Apr 2003 17:46:38 +0000

Lotsa folks supported "Etherspan" (balanced by src/dst MAC/IP address hash) -- it just wasn't that popular a feature...


From: Jon Pastore [mailto:jpastore () idetech net]
Sent: Wednesday, April 16, 2003 2:54 PM
To: 'Lee Burleson'; madadulate () hotmail com;
security-basics () securityfocus com
Subject: RE: jeckyl hyde network

Another good product priced a little better with more expandability is
the HP Procurve 8000 I switched to those from the catalyst 2900 xl I was
using...only advantage you get with Cisco I think they are the only one
who support this protocol (etherlan? I forget) basically you can take 2
or 3 ports on both switches and load balance between them to effectively
create a larger pipe between switches without getting a split horizon or
something of the like...this was before gigabit was big and cheaper then
it was...so we had 300Mb pipes between some of our switches...

Now we just have 2 HP Procurve 8000 1 with 5 gigabit ports (1 for each
switch) and 1 with 72 10/100 ports and 1 gigabit...and some smaller dell
24 port 10/100 with 1 gigabit...

Before I got off on that tangent =) I think the HP Procurve also support
the VLAN from an easy to use web interface if I remember correctly...

Jon Pastore, President
IDE Tech, Inc.
(954) 360-0393 Office
(954) 428-0442 Fax

-----Original Message-----
From: Lee Burleson [mailto:lburleso () hotmail com]
Sent: Wednesday, April 16, 2003 9:49 AM
To: madadulate () hotmail com; security-basics () securityfocus com
Subject: re: jeckyl hyde network

You said you have a Cisco 2900 switch ... as part of the
solution, you may be able to use private VLANs to divide the
trusted and untrusted ports.  the local router would be on a
"promiscuous" port.

In this configuration, the nodes in each community can only
communicate amongst themselves but the router could communicate
with all ports.

Here's a great link to explain the concept:

Not sure if the 2900 even supports it; it may need a software
upgrade to do so.  If it doesn't support it, you could still
learn something in the process.  :)

- Lee


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