Hey guys, I've just setup my lab with Dynamips and real switches. I'm using a 3550 as a breakout switch though and as a result can't get l2protocol tunnelling to work - ie no CDP/VTP/STP between virtual world and real world. Just wondering if there is anything in IPExpert labs where the l2protocol tunnelling would be a requirement?
Cheers, Ben. From: [email protected] [mailto:[email protected]] On Behalf Of --Hammer-- Sent: Wednesday, 25 August 2010 2:31 PM To: [email protected] Subject: Re: [OSL | CCIE_RS] GNS3 as a study aid Good response Adam. I too am using GNS3 with physical switches. I'm working thru the IPExpert volumes and haven't seen any significant problems yet. As someone who has successfully failed the lab I can say that using GNS to prepare for the configuration section works pretty well. If you don't have real switches, then you'll really need to rent-a-rack at least a few times to get your switching skills homed. Other than that, it's a great product. --Hammer-- On 8/24/2010 5:58 PM, Adam Booth wrote: Hi Andy, Welcome to the list. I would like to suggest that rather than piggy backing onto an existing mail thread and asking a completely different topic that in the future you start a new one. The reason being is that I don't think everyone will open up a thread asking about SNMP unless they are interested, so you may miss out on their possible input about a topic like using GNS3/Dynamips. Tools like GNS3/dynamips can certainly be helpful and there are people that use it as their main study aid but there are sometimes problems and limitations that are generally chalked up to occurring with the emulation platform. The volume 1 workbooks from IPExpert includes a .net topology that can be used. To use dynamips effectively you are going to have do a good amount of research and learning, searching the mailing list archives, CCIE blogs, the Dynamips forum http://7200emu.hacki.at/ and googling as well as fiddling around for yourself prior to asking for help should be your tools - depending on your circumstances this might be an added difficulty that you can do without and so the other alternatives of renting time on a rack or buying actual routers and switches for your home lab may be worth while - or even using a combination of the different methods depending on the technology you are using and the network complexity. In my personal circumstances I am using dynamips and real switches but if it gets to a particular point where I am not happy with how my environment is performing, I am prepared to change to rack rentals. My thoughts on the matter when I was first actually committing my personal effort towards the CCIE are in my blog http://noshut.blogspot.com/2010/02/is-having-home-lab-like-having-home-gym.html - I haven't sat the exam so I cant say it has categorically work for me and to be honest even if I purely used rack rentals, I think I would use dynamips anyway as its good to quickly bang something together and test if theres a particular problem case in your mind - and its something you can carry about with you and use on a laptop - not so each to lug a number of 2811s around with you :) Hope that's of some help - I have changed the message subject so hopefully you will also get some more opinions too. Cheers, Adam On Wed, Aug 25, 2010 at 6:32 AM, Lackraj, Andy <[email protected]<mailto:[email protected]>> wrote: Hey guys, Looking to do the IE and was wondering how many of you guys have used GNS3 and how is it? Would it be adequate tool to prepare for the lab? Any feedback is appreciated. Thx.. ________________________________ From: [email protected]<mailto:[email protected]> [mailto:[email protected]<mailto:[email protected]>] On Behalf Of Adam Booth Sent: Tuesday, August 24, 2010 3:23 AM To: Taqdir Singh Cc: [email protected]<mailto:[email protected]> Subject: Re: [OSL | CCIE_RS] snmp engine id Hi Taqdir, The engine id is used with the snmp user password to generate the MD5 digests (the system will not store the passwords - just the engine id and MD5, so if one or the other changes, you need to use the password and regenerate the MD5 hash. RFC2274 discusses the user security model) Another thing I think was introduced with SNMPv3 but I'm pretty sure can also be used with SNMP 2c is the use of SNMP Views. This basically allow limiting which parts of the MIB tree that can be looked at for a particular user or community, an example would to allow a managed customer to pull out interface stats and cpu load but not see everything else... Cheers, Adam On Tue, Aug 24, 2010 at 4:34 PM, Taqdir Singh <[email protected]<mailto:[email protected]>> wrote: Hi All, In snmp v1 and v2c there was no concept of engine id and no authentication and encryption so snmp v3 came with md5 authentication and encryption of packets. what is the purpose of snmp engine id local and remote in snmp v3? .... default is also set... -- -- Taqdir Singh /Networks Do today what others won't, so you can live tomorrow as others can't _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com<http://www.ipexpert.com> ________________________________ This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. 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