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9044 Views 25 Replies Latest reply: May 3, 2014 11:20 PM by Paul RSS 1 2 Previous Next

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GNS3 Best computer?

Nov 16, 2011 1:56 PM

What is the best computer to build for gns3 ccnp? I am looking to build a computer in the spring, after my ccna, just for gns3/cisco. I will not be using this computer to game. It will just be for gns3/homework  I want to be able to run 10 routers and not be running to high.

 

 

thanks

 

dean

  • johntaddeo 55 posts since
    Nov 21, 2008
    Currently Being Moderated
    1. Nov 16, 2011 2:10 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    Running it fine on a Win7 64 bit machine with Core2 Duo and 4GB of RAM.  As long as you set the idle-pc values correctly and use a GNS friendly router image (I use the 3725's), you should have no troubles running 10 routers.

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  • Graham 6 posts since
    Oct 30, 2008
    Currently Being Moderated
    2. Nov 16, 2011 3:50 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    You could also check out the forums at http://7200emu.hacki.at/. You will find a huge amount of information there! Also, as johntaddeo says, get your idle-pc values sorted properly - read the forums carefully on how to do this.

     

    Also depends on what you're doing. I've used Dynamips on a 4 year-old laptop and desktop, neither particularly grunty (1M RAM, a fairly standard CPU) and had 10 routers running easily. But I was only testing a specific feature each time - for example, BGP confederations.

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  • Martin 13,889 posts since
    Jan 16, 2009
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    3. Nov 16, 2011 4:03 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    No Games!

     

    1. More RAM = More GNS routers; so 64-bit capable box is ideal for gns3 due to limit of RAM support by OS. 4 GB up to 8 GB would be enough.

     

    2. CPU - I think Intel runs better than AMD, 2 are OK, 4 cores are better. Weaker CPU means higher CPU utilization. i5 or i7 are perfect.

     

    3. NIC. get if you can dual NICs and ones that will support VLan tagging 802.1q (do not strip Vlan IDs from frames).  802.1q matter if you want to do router-on-stick.

    Some NICs support Vlans and priority which could be handy to do some QoS.

     

    see

    https://learningnetwork.cisco.com/thread/23445

     

    https://learningnetwork.cisco.com/thread/25577

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  • Martin 13,889 posts since
    Jan 16, 2009
    Currently Being Moderated
    5. Nov 16, 2011 4:49 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    oh, you can do router-on-stick totally inside of GNS3;

    or you can use GNS router and connect real switches to GNS.

     

    you will need 2 x c3550 EMI or SMI switches as well; 

     

    btw. router on stick is on CCNA now.

    even 4 GB is OK for 10 routers; make sure you new motherboard supports more, like 8, 12 GB.

     

    Make sure you will have 2 PCI slots free to add special NIC or usb ports. 

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  • Martin 13,889 posts since
    Jan 16, 2009
    Currently Being Moderated
    7. Nov 16, 2011 7:43 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    Yes, you can connect any real device to a GNS3 using Cloud in GNS;

    if you drag and double click on Cloud, you have configuration page; there you see all your NICs installed on PC like MS loopback, any VMWare NICs, and so on,

    MS Loopback is handy to communicate with your Host PC; you can ping from cmd of Windows to GNS3 router interface if you connect and set up properly;

     

    what is "pic"

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  • Martin 13,889 posts since
    Jan 16, 2009
    Currently Being Moderated
    9. Nov 16, 2011 8:54 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    well, u can use GNS3 for CCNA; especially when you router is broken;

     

    Just remember that GNS3 routers will have interfaces UP UP even thou there is nobody on the other end; just one and the only one  flaw of GNS3 emulating its interfaces. 

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  • Natraj Babaria 841 posts since
    Jul 20, 2011
    Currently Being Moderated
    11. Nov 16, 2011 9:18 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    Hi Dean,

     

    If you for CCNP only you can take core i3 with 4GB of RAM and if you want for further you can buy core i5 with same 4GB of RAM and there is one more processor os there you can buy AMD Phenon 2 that also has good power with 8MB of cahce memory.

     

    Thanks & Regards,

    Natraj Babaria

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  • Martin 13,889 posts since
    Jan 16, 2009
    Currently Being Moderated
    12. Nov 16, 2011 9:19 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    IP phones will need files from tftp server and have to be settup on Voice router;

    to se if your IOS supports VoIP do this:

    in config mode type : telephony-service setup

    if you got wizard, you are OK, in there is an error, try telephony ?

     

    if your switch does not support power over Ethernet then you also need power brick for phone;

     

    Remote PC does not need to be powerful pc;

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  • Natraj Babaria 841 posts since
    Jul 20, 2011
    Currently Being Moderated
    14. Nov 16, 2011 9:39 PM (in response to Cameron Hughes)
    Re: GNS3 Best computer?

    Hi Dean,

     

    Your welcome buddy. Yeah choose anyone of this beacuse all are having good power but pricing is different different.

     

    Thanks & Regards,

    Natraj Babaria

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