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  • Joshua Johnson - CCNP R&S 5,149 posts since
    Sep 22, 2009
    Currently Being Moderated
    405. Mar 26, 2012 6:57 PM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    I could have sworn Travis was using Fedora or some other distribution.  Maybe he'll pop in and say something.

  • Greg, CCNP, JNCIP 171 posts since
    Sep 14, 2011
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    406. Mar 26, 2012 10:25 PM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    I have no problems running GNS3 on Ubuntu w/ a regular user account, don't have to gksudo or anything.  I've heard that using the tap interface requires root access, but I haven't had any problems attaching my GNS3 devices to cloud/tap.  Maybe it's because I wrote my init script to assign ownership of the tap interface to the regular user: "tunctl -u user -t tap0". What other GNS3 tasks supposedly require root?

     

    user@ubuntu:~/bin$ ps aux | egrep '(USER|gns3|dyna)'

    USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

    user     13067  2.4  1.7 229612 43588 ?        Sl   01:18   0:02 /usr/bin/python /usr/bin/gns3

    user     13075 67.7  8.0 348248 205304 ?       Sl   01:18   0:52 /usr/bin/dynamips -H 7200

    user     13090  1.3  0.1 128096  3160 ?        Sl   01:18   0:01 /usr/bin/dynamips -H 7201

    user     13126  0.0  0.0   4152   844 pts/1    S+   01:19   0:00 egrep --color=auto (USER|gns3|dyna)

     

     

    Yes, I really did call my regular user account "user" :-)

  • Joshua Johnson - CCNP R&S 5,149 posts since
    Sep 22, 2009
    Currently Being Moderated
    407. Mar 27, 2012 7:22 AM (in response to Greg, CCNP, JNCIP)
    Re: GNS3 Testing IN Progress !

    Just interfaces

  • Currently Being Moderated
    409. Mar 28, 2012 8:21 PM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    Just an observation I ran into this evening. I was trying to construct a site-to-site vpn to run multiple vlans through this tunnel using xconnect interfaces. The weird thing I ran into was the vpn coming up, was stable all the time, but packets through the vpn were dropping over 50%. The drops did not occur equaly distributed, the drops occured for 15 to 20 secs after a bunch of packets went through without a problem. Just before the dropouts happened the pings started to take longer, up to 250ms, then connectivity was lost for another 15 to 20 secs. After testing different router models and interfaces it turned out to be GNS under W7. After I forced GNS to run in Vista compatibility mode, everything worked as intended.

     

    Just a heads up for anybody who may be experiencing some issues with VPNs in GNS

     

    Best

       Patrick

  • Gerard Weese 220 posts since
    Jan 30, 2010
    Currently Being Moderated
    410. Mar 28, 2012 10:36 PM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    Martin wrote:

     

    Not just for simple GNS usage; I set up multiple instances of advanced GNS3 (Breakout switch, etc) where I had to modify some of system files.  It would be nice to login as Root for initial set up, then use it as a regular user afterwards.

     

    it looks like Ubuntu 11.10 (latest with Kernel 3.0) has stolen Windows 7 drag-and-snap feature and Aero-look-a-like graphics!   And when installing software, I did not have to type root password at al!  Maybe they have realized that typing root password too much is annoying?

    I'm assuming that is Oneric and you are using the flashy new Unity desktop, I didn't know it came with the 3.0 kernel. Do you run Server Edition or desktop for GNS3. I ask because recently my Win7 machine died and I have been relegated to my Macbook, to use GNS3 I've had to install it on Ubuntu Server Edition, and i've had X11 to it to run GNS3.(works suprisingly well)

  • Nuno 305 posts since
    Nov 25, 2010

    Thanks for sharing that tip Patrick, im actually using it in my w7 machine and my ubuntu machine, no problem in ubuntu and for example in w7 i cannot have a lab running more than 20 minutes, dynamips server crashes.

     

    thanks for the tip,

     

    NL

  • Nuno 305 posts since
    Nov 25, 2010
    Currently Being Moderated
    412. Mar 29, 2012 3:41 AM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    Hi Martin,

     

     

    Martin wrote:

     

    Not just for simple GNS usage; I set up multiple instances of advanced GNS3 (Breakout switch, etc) where I had to modify some of system files.  It would be nice to login as Root for initial set up, then use it as a regular user afterwards.

     

     

     

    you can just create a shortcut on your desktop and edit it to run as root:

    sudo python “/opt/GNS3/gns3″ (or the path you have install it to)

     

     

    Martin wrote:

    it looks like Ubuntu 11.10 (latest with Kernel 3.0) has stolen Windows 7 drag-and-snap feature and Aero-look-a-like graphics!   And when installing software, I did not have to type root password at al!  Maybe they have realized that typing root password too much is annoying?

     

    Actually it was the contrary, m$ is running after ubuntu which is leading the cutting edge technology since version 8.04 (which in my optionion was the best stable ubuntu release to date). Ubuntu is now falling and moving into a very obscure path IMO, which has lead many long time users like me out of their track. I installed 11.04 some 4 ot 5 months ago and i really dont like it, too many bugs which are not addressed, lack of support for various hardware boards, instable in my optinion. Regarding their new default desktop system unity i really dont like it and i consider it Not for me. But you can get rid of it and fall back to gnome classic or gnome 3, very simple.

     

    The thing that you dont like about "typing the root password" for every process or application that needs to make changes with elevated priviledges in your machine is one of the technologies micro$oft adopted which linux had since i can remember really. you can change these settings at your will, remember its an Open Source software, you can change it and make what you want, but remember the purpose of why it is made that way in the first place.

     

    I would advise you to check opensuse and give it a try, iv used it for long time now, and last year i had a laptop at work with it, it is still a very stable and robust system, one of my favorits really and they have a "Single Click" GNS3 installation and their community is very good, one of the best. check it out and give it a try.

     

    one of the things i see oftenly is people just being dragged when a new release comes out without really reading whats new in it and what benifits it really brings to your current work needs. i always fallow the "if its working, and working stable, do NOT touche it" mentality, iv had so many problems in the past that iv learned not to just install a new version just because is new. Right now me and every one here i think, needs the most spare time to study and focus their time on networking/cisco so what i see logic is getting a stable robust desktop system they feel confortable with and stick with it, that way you wont have to spend hours and hours trying to figure out what to do to fix a problem because no one address it yet (thats the problem with new releases) including new gns3 releases, remember gns3 has no support what so ever, i still use version 0.7.4 and it is stable in my linux so im not touching it! maybe i will upgrade it in a few more months, depending on the reviews and the problems that will or not be addressed, i think its the best option for me because i dont have time to lose.

     

    if your having a hard time give opensuse a try im sure you wont regret it and once you have a stable machine just keep it that way, this is my opinion hope it helps,

     

    NL

  • Just a little more info on the observation I described in post https://learningnetwork.cisco.com/message/222757#222757 (409) in this forum:

     

    The described effect shows not only when using a VPN from a GNS-router to a peer in the internet, it shows also when practicing multicast configs. I did not find any references to my VPN issue with the intermittend ping drops but I found some info about using multicast. In the previous post (409) I thought switching into Vista compatibility mode should fix this, but no, this is not the solution. I had some better success with switching off "route-cache cef" on the interface, but this was not the complete solution either. The culprit is the emulation of the FastEthernet in the 26xx/37xx routers. (You can find some entries in hacki's forum about multicast and intermittend packet loss). It seems there is something odd when using double encapsulated or multicast packets. When you send more than just 20 vpn or multicast packets through the GT96K FE interface this problem shows. A show controller reveals the chipset:

     

    CSS#sho controller f 0/0

    Interface FastEthernet0/0

    Hardware is GT96K FE ADDR: 66667A48, FASTSEND: 6072E6E4, MCI_INDEX: 0

     

    Nothing wrong with 26xx/37xx emulations as long pim/multicast and VPN is not on your list. To avoid running into phantom errors and you possibly going to pull your hair out because your config seems to be wrong, give the 7200 router a try. The Ethernet/FastEthernet/GigabitEthernet interfaces use a different chipset.

     

    CSR#sho controller g 0/0

    Interface GigabitEthernet0/0 (idb 0x66BC8A50)

    Hardware is i82543 (Livengood) 3?

     

    With this chipset all seems to run rock solid. The downside is the needed ram. Cisco recommends 512Mb ram for an advanced IP services IOS.

     

    Hope that helps a little to avoid weird effects and foremost unnecessary troubleshooting.

     

    Patrick

  • What I overlooked is the fact that you can still use 26xx/37xx routers if you plug-in other interface controllers. The switchmodule cannot support subinterfaces if you make the port a routed port by configuring "no switchport". So this is not an option. If you use the "NM-1FE-TX" then you are using the AMD chipset.

     

    CSR#sho controller f1/0

    Interface FastEthernet1/0

    Hardware is AMD Am79c971

     

    This works perfect for me, so VPN and multicast will work again with my favorite 2691 or 3725 routers.

  • Currently Being Moderated
    416. Apr 24, 2012 12:47 AM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    quick question guys. I have seen .net topologies using localhost or 127.0.0.1 for hypervisor. When is the best time to use between the two? im confused

  • Currently Being Moderated
    417. Apr 26, 2012 3:55 AM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    i think gns3 doesnt support L3 portchannel

     

    Command below gets an error

     

    !

    interface Port-channel12

    no switchport

    ip address 10.2.4.13 255.255.255.252

    ipv6 address 2026::3:1/122

    ipv6 rip RIP_ZONE enable

    !

  • Fabrizio Chessa 349 posts since
    Apr 5, 2011
    Currently Being Moderated
    418. Apr 26, 2012 11:01 AM (in response to ampdeck)
    Re: GNS3 Testing IN Progress !

    Hi, ampdeck

     

    Can you send running config for interfaces configured to bundle Po12?

  • Currently Being Moderated
    419. Apr 30, 2012 1:00 AM (in response to Martin)
    Re: GNS3 Testing IN Progress !

    should I just use the default ram to 128mb in GNS3? or it should based on my physical ram?

     

    btw, here's my machine's setup

    Core i7 2.13ghz

    4gb DDR3

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