From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sat Sep 01 2007 - 21:38:06 ART
Actually you can emulation an access server. Also with Dynamips you can
do about 100% of the routing tasks and 80% of the switching tasks for the
R&S CCIE lab (100% for for SP CCIE) using a single computer running a full
rack of equipment. You don't have to connect to real switches if you
don't want. Just rent rack time at the end of your preparation to get
access to real switches. $600 Mac Mini for Dynamips plus $400 in rack
rentals is a nice solution that is working for more and more people these
days. Having access to your own rack of equipment (real or virtual) that
you can hop on to test something out whenever you want is pretty much
priceless.
Lastly for learning purposes it's hard to beat the real time packet
capture ability of the Dynamips solution.
http://dynagen.org/tutorial.htm#_Toc165530758
No more guessing as to why inverse-arp isn't working as expected ;-)
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
>----- Original Message -----
Subject: RE: Dynagen folks...
Date: Sat, September 1, 2007 16:08
From: "Scott Morris" <smorris@ipexpert.com>
> I don't think it's stuff that will matter that much, but can you emulate
> console port connections for a full stack of routers?
>
> Or, by the time you get your PC outfitted with 16 ethernet ports to plug
> into your switches, haven't you just spent as much in equipment and your
own
> valuable time as getting real equipment?
>
> I don't think it's anything truly important, but it just depends on where
> you like to spend your time. Me, I don't like unix that much, so the idea
> of configuring a box for Dynamips isn't ranking real high on my list. But
> that's just me. Doesn't mean I think it's useless at all!
>
> I'm all for the couple instances on a laptop to test minor things while
> flying cross-country on the airplane... I did that with my Juniper
studies,
> so I certainly have no qualms about it with Cisco gear.
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> VP - Technical Training - IPexpert, Inc.
> IPexpert Sr. Technical Instructor
>
> A Cisco Learning Partner - We Accept Learning Credits!
>
> smorris@ipexpert.com
>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> http://www.ipexpert.com
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Scott Vermillion
> Sent: Saturday, September 01, 2007 1:06 PM
> To: Cisco certification
> Subject: RE: Dynagen folks...
>
> Scott,
>
> I will ask of you the same thing I asked of Joe:
>
> Please be specific on what you can do w/ a stack of e-bay routers that you
> cannot do in Dynamips *that matters in the lab.* I'm honestly
interested in
> hearing from people on that issue.
>
> I agree that there is a time investment to get this set up. And a $$
> investment in the real switches. But I have now have 24/7 access to a full
> "rack" and I don't have to schedule anything with anybody. For those of us
> who remove ourselves from the working world while we prepare for the lab,
> this can actually be a cost savings (every day that goes by is a day I
can't
> bill any clients for my time, so the more intense I am about this, the
> sooner I get back in the money).
>
> Regards,
>
> Scott
>
> -------- Original Message --------
> Subject: RE: Dynagen folks...
> From: "Scott Morris" <smorris@ipexpert.com>
> Date: Sat, September 01, 2007 5:48 am
> To: "'darth router'" <darklordrouter@gmail.com>, "'Scott
> Vermillion'"
> <scott_ccie_list@it-ag.com>
> Cc: "'Cisco certification'" <ccielab@groupstudy.com>
>
> And the self-handling have no risk of STD. ;)
>
> Anyway, there are some subtle things that cannot be done on a
> virtualized
> devices. There is a LOT of time to be spent in order to get a full
> system
> setup and integrated with real switches in order to get the full
> flavor of
> actual equipment/lab.
>
> However, it's a bit cheaper to go virtual! Either way, virtual stuff
> isn't
> a substitute for real equipment, but I don't think it would add up to
> someone failing because they just did Dynamips. Unless of course,
> they did
> Dynampis exclusively on routers and virtualized ethernet connections
> without
> touching ANY switches. Then there would be a significant number of
> points
> lost and likely unable to recover enough to pass.
>
> Worst case, do most of the L3 'n' up studies on Dynamips.... Go rent
> some
> rack time and concentrate on the L2/ethernet side of things. Problem
> solved, money saved.
>
> Ya know there's a holiday for your parenthetical analogy there....
> Palm
> Sunday. ;)
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> VP - Technical Training - IPexpert, Inc.
> IPexpert Sr. Technical Instructor
>
> A Cisco Learning Partner - We Accept Learning Credits!
>
> smorris@ipexpert.com
>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> http://www.ipexpert.com
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> darth router
> Sent: Saturday, September 01, 2007 3:04 AM
> To: Scott Vermillion
> Cc: Cisco certification
> Subject: Re: Dynagen folks...
>
> You guys are going it all wrong. You have to fight analogy with
> analogy.
>
> (Even if you arent a virgin, sometimes you would just rather whack
> off) =
> DYNAMIPS!
>
> I had a full CCIE lab, sold it, recouped money, and dynamips is much
> much
> more efficient as far as building topologies and changing things.
>
> bwahahahhaha!
>
> On 9/1/07, Scott Vermillion <scott_ccie_list@it-ag.com> wrote:
> >
> > 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
> >
> > use. Delivery of Cisco cryptographic products does not imply
> >
> > third-party authority to import, export, distribute or use
> > encryption.
> >
> > Importers, exporters, distributors and users are responsible for
> >
> > compliance with U.S. and local country laws. By using this product
> > 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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> >
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