Hi all,
The request for multiple probes on one device is almost as old as IM
itself! I can remember making the request in 1995.
Bill, while IPv6 should have this from the start and I applaud you
for moving ahead with this, IPv4 will be with for far longer that some at
the IETF would like. I know of not a single commercial enterprise that my
company serves that has both hardware and software fully IPv6 compliant. In
many cases their routers or edge facing firewalls are not fully IPv6
complaint at this time. As a direct provider to such corporate networks, we
have yet to understand the benefit to us of adding IPv6 to our routing.
[Over the years as we have grown in customers, customers are
requesting smaller IP assignments. In fact we have had customers who have
returned IP to us. We are operating under the same IP allocation from ARIN
1999 and still have IP unassigned. While we do not have an excess of such
IP, we do not have any immediate needs for increasing allocation space.]
I suspect we are all still some years away from true ubiquitous IPv6
networks.
As such, the request (which I had given up on by 1999) still has
merit. It certainly would reduce the confusion in my maps. How many icons
for the same device does anyone want on a map?
I understand that you say it will be a significant re-write. Since
the multi-probe request was first floated in 1995 we have gone from a
freeware package that ran only on Macs, to a server client code entirely
re-written in Java along with a entirely new piece of code which you
eventually named IM-R, the support for NT services which is Multi-Probe in a
sense, support for Nagios probes and now the NetFlow rewrite.
As someone who thinks of both you and Rich as friends and
colleagues, and as someone who has only the highest regards for all of you
at Dartware, I ask that you seriously look at Rich's concept.
Best regards,
Mike Lieberman
Net Wright
-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of William W. Fisher
Sent: Thursday, May 08, 2008 8:20 AM
To: InterMapper Discussion
Subject: Re: [IM-Talk] Multi-probes for same device under one icon
Richard E. Brown wrote:
> --- Michael Luzadder wrote:
> How close are we to getting a single icon to represent multiple probes on
> the same device? (like a mail server; one probe for host resources,
another
> probe for snmp, another for http, etc..)
> --- end of quote ---
>
> I'm actually working on a specification for this now.
>
> My current thinking is that a single icon in a map would represent a
> "collection" of probes. The collection would test a single IP address. Any
of
> InterMapper's probes could be added to a collection (including other
> collections). These probes would be executed sequentially, once every poll
> interval.
My problem with this proposal is that it requires a significant change of
code. The existing architecture is one vertex
--> one device --> one probe.
Rich is proposing one vertex --> one device --> multiple probes.
In my opinion, one vertex --> multiple devices is easier to implement
because there is no change in polling behavior.
The notion of multiple "subdevices" is easier to shoehorn into the existing
schema for IMDatabase than devices with
multiple probes.
In IPv6 land, devices have multiple IP adddresses as a normal state of
affairs. If you wanted to test a MAIL server over
both IPv6 and IPv4, you would still need two icons in Rich's proposal. In my
proposal, the devices could be grouped
under a single icon even though they have different addresses. In Rich's
proposal, you would be required to poll the
mail server, host resources, http server *all* at the same poll interval. In
my proposal, you could set different poll
intervals for the different "subdevices" of the one visual icon.
Just my thoughts.
Bill Fisher
Dartware, LLC
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