RE: Cisco CDP through ISA?
- From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 14 Dec 2004 06:50:18 -0800
If CDP actually operates at L2 (Data Link), this is correct; ISA (and
most other firewalls) operates at L3 (IP) and up. Remember; L2 is only
useful between neighboring devices.
I wandered through the public docs on CDP at the Cisco site (Google
works well for discovering this).
They make reference to SNMP usage as well, so perhaps some deeper
digging
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
-----Original Message-----
From: William Robertson [mailto:robertson.william@xxxxxxxxxxxxxx]
Sent: Tuesday, December 14, 2004 5:32 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Cisco CDP through ISA?
http://www.ISAserver.org
Hi there
We have recently installed CiscoWorks and have started managing all of
our
current Cisco kit. The last goal I have is to monitor the "Internet
Router"
on the public interface of my ISA firewall, so I was thinking that I
could
merely create a new protocol definition and continue as per normal...
WRONG!!!
I have just been informed that Cisco's CDP protocol is a layer 2
protocol,
and thus cannot be "allowed" through a firewall. Frankly, this just
sounds
like a challenge waiting to be accepted... Any takers out there?
Cheers
William R.
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