From: Scott Vermillion (scott_ccie_list@it-ag.com)
Date: Sat Sep 01 2007 - 01:57:58 ART
I'll take this a step further Joe (and maybe you have a good answer, I
don't presuppose with any degree of certainty, but I can suspect):
Other than some of the text that flies by during the boot sequence, if
the Brians secretly redirected you to a rack where the routers were all
Dynamips instances (excepting the ISR, which Dynagen does not emulate as
of this time), how would you know they had done that, exactly? Would it
be the "feel" perhaps? The "force" maybe?
I'll tell you one way you might notice: I can boot a router instance on
this Mac Mini in a matter of a few seconds! I get "press return to get
started" in a very small fraction of the time I do when booting a
hardware router. Other than that and the aforementioned text thing, I'm
not sure how you'd ever even know sitting from afar?
-------- Original Message --------
Subject: RE: Dynagen folks...
From: Scott Vermillion <scott_ccie_list@it-ag.com>
Date: Fri, August 31, 2007 10:38 pm
To: Cisco certification <ccielab@groupstudy.com>
I am a true Dynamips/Dynagen believer and have built my lab prep
"rack"
around it/them. Please explain, Joe, how I will fail the CCIE lab
because of it ("nothing else can prepare you for the real thing")?
What
is it about that "feel" that makes the difference (can you go "feel"
the
routers during the practical? Can you "feel" the routers in that
remote
rack?)?
This has the potential to become the next "CCIE vs. college degree"
topic, me thinks. It's probably not a very good use of bandwidth,
come
to think of it LOL, but I can't resist asking you to elaborate on
these
seemingly unfounded generalizations. I would prefer that you answer
with
"I have hardware routers and I also run Dynamips/Dynagen on a machine
of
sufficient horsepower, and here are the things I can do on the former
that I can't do on the latter *that matter in the lab* (i.e. don't
tell
me about toggling the power switch...yawn...you can't do that in the
lab
anyway by all accounts I've ever heard).
I'll start, going the opposite direction:
I run Dynamips/Dynagen on a machine of sufficient horsepower, and I
can
directly capture traffic from a router interface into a .cap file and
scrutinize every one and zero using open source WireShark. When I
want
to do that w/ physical routers, I have to use Ethernet (no serial)
and
set up a span port on a switch or put a hub in between the two
routers,
with a machine running WireShark hanging off of the hub (and I'm
obviously in HDX at this point, which means the test environment is
different than the non-test environment). Otherwise, I'm limited to
only
debug. I, of course, acknowledge that you're limited to only debug in
the lab, but in your preparation for the lab, it's powerful to have
such
a tool at your disposal so that you can truly understand what's going
on
under the hood when you see certain debug output.
BTW, I'm told Juniper has this capability to write .cap files on
physical
routers, but I cannot personall y verify. I have never heard of such
a
capability on Cisco routers, but I'd love to be proven wrong.
There are more, of course, but I've already stated many of them in
other
recent threads and posts...
-------- Original Message --------
Subject: Dynagen folks...
From: "Joseph Brunner" <joe@affirmedsystems.com>
Date: Fri, August 31, 2007 9:53 pm
To: "'Cisco certification'" <ccielab@groupstudy.com>
Nothing feels as good as the real thing. And else nothing can prepare
you
for the real thing.
(Remember if you only have had sex with a condom, your still a
virgin, LOL)
Check out the Brian's racks!
http://www.affirmedsystems.com/photos/IERACKS.JPG
Rack12R6#sh vers
Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M),
Version
12.4(13a), RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Tue 06-Mar-07 17:01 by prod_rel_team
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
Rack12R6 uptime is 6 hours, 4 minutes
System returned to ROM by power-on
System image file is "flash:c2800nm-adventerprisek9-mz.124-13a.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
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encryption.
Importers, exporters, distributors and users are responsible for
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you
agree to comply with applicable laws and regulations. If you are
unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be
found
at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email
to
export@cisco.com.
Cisco 2811 (revision 53.50) with 196608K/65536K bytes of memory.
Processor board ID FTX1101A1Z0
2 FastEthernet interfaces
1 Serial(sync/async) interface
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
253160K bytes of USB Flash usbflash1 (Read/Write)
62720K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2142 (will be 0x2102 at next reload)
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