1 2 3 Previous Next 522 Replies Latest reply: Mar 19, 2015 2:08 AM by Legnica69 RSS

    GNS3 Testing IN Progress !

    Martin

      Well, I decided to play a bit with GNS3; have a bit of Fun with it;  I will update the progress every week, so check in often.

       

      PC is new Intel i7 (4 cores & 4 HT); only 4 GB RAM (for now), SATA, and Win 7 64-bit.

       

      test #1: No running routing protocols; but with no exec-time out set on all routers.

      One IOS across topology with same idle-pc values. Running 24 3725 routers (L3 switch is actually 3725 router with NM-16ESW)

       

      Result: With 24 routers: More RAM, the Better; need Raid 0 ?

      24 Routers in GNS3 Win7-64.png

      Questions: What is Standby RAM (dark blue on graphic) ? There is also Free Memory

       

      Next: Will try to **** PC by adding more routers.

      Add MPLS and OSPF protocols.

      ============================================================

       

      Running MPLS over EIGRP in the Core (ISPs) and BGP between HQ and Branch.  With 7 routers, GNS is stable at 0-1% of CPU and 51% RAM. Pings HQ to Branch are peaking at 9-10%. Traceroute reaching 14%

      MPLS withBGP and OSPF.7Rs run.png

       

      Message was edited by: Martin

        • 1. Re: GNS3 Testing IN Progress !
          Aninda

          Martin, first thing you'd wanna do in GNS3 is calculate the IDLE PC value for each of your router images. Without that, dynamips really taxes your comp.

          My PC config: AMD Phenom II X4 (Quad-core), a 1GB video card by MSI (HAWK version), 4 GB DDR3, 500 Gb HDD.

          I'd say I have a pretty decent rig, and without IDLE PC my CPU temperature reaches 50 with only a few routers and 25-30% of memory usage (my PC usually runs at 30 C. 27C while doing nothing).

          • 2. Re: GNS3 Testing IN Progress !
            real_magiz

            Dear Martin

             

            First of all, I would like to say you are very lucky using windows 7 with GNS3. Because windows7 has readyboost feature

            http://windows.microsoft.com/en-US/windows7/products/features/readyboost. You can simply increase your memory with USB flash drive.

             

            If you know linux commands and familiar , you can add PC with Qemu (host https://learningnetwork.cisco.com/message/82967) . Qemu is better than VPC. Actually it is Redhat based commands. For example, if you do not know how to set your default gateway, you can find in google for desired commands . You don't need to master linux.

             

             

            Please refer to http://www.ccie-in-3-months.blogspot.com/2008/05/how-to-use-extended-range-vlans-in-nm.html

            for switching in GNS3.

             

            As I have not used Resource monitor instead of Windows's Default Task Manager, I am sorry I could not provide what that is.

             

             

            regards

            Real

            • 3. Re: GNS3 Testing IN Progress !
              Keyboard Banger

              Martin, you can also check my notes here, I've put some notes about GNS3 during my BCMSN/SWITCH preparation.

              • 4. Re: GNS3 Testing IN Progress !
                Mr.Snedie

                A great tip for GNS3, don't use the Dynamips consoles.

                 

                Instead use a terminal(Telnet) program like SecureCRT (Has tabs) and just connect to 127.0.0.1 <port>. You can set the port by right clicking a device and hitting "Set local console port" iirc. Using this method you alleviate two problems:

                 

                1) If you close an hypervisor window you device in effect shuts down. Using Telnet/Console through a client GNS runs the hypervisor in memory instead and can directly save the configs

                2) You don't have 24 tabs to surf through in order to find the correct device

                3) Not relevant: This method helps to enforce access principles used on the job.

                 

                I have also expanded this method to allow remote connections from outside of my network through the use of Static PAT

                • 5. Re: GNS3 Testing IN Progress !
                  grimord

                  Martin you have helped me many times thanks

                   

                  I started using this Usage meter awhile ago I think that you will like it's size and configurable features.

                   

                  http://img709.imageshack.us/img709/148/capturejxq.jpg

                   

                  I found it free in a short time google usage meter, windows usage meter,

                   

                  hope you like it

                  • 6. Re: GNS3 Testing IN Progress !
                    chenson

                    Mr. Snedie,

                            Absolutely you are correct. I actually run GNS3 on a dedicated server. I have all my SecureCRT configs on my  laptop and connect remotely. IP of server and console port. Works great and I'm not impacting the GNS3 performance by running local shells.

                     

                    --Charles

                    • 7. Re: GNS3 Testing IN Progress !
                      Joshua Johnson - CCNP R&S

                      Hey hey, I'm glad you guys are talking about GNS3... Check this out, i'll be buying these parts in two weeks, specifically for running GNS3 and connecting to physical networks    Let me know what you think.  Be prepared with your comments if you have any suggestions, I will gladly accept your advice if it sounds good.

                       

                       

                      SEE ATTACHED PDF

                      • 8. Re: GNS3 Testing IN Progress !
                        chenson

                        Nice specs. I just finished writing an article on hardwiring GNS3 to physical switches on GNU/Linux. Hit me offline if you want any details.

                        • 9. Re: GNS3 Testing IN Progress !
                          Joshua Johnson - CCNP R&S

                          Scratch that memory I listed, it's too fast for the motherboard.  I'll be getting somewhere between DDR3 1600 - DDR3 1866 mhz Dual Channel

                          • 10. Re: GNS3 Testing IN Progress !
                            Mr.Snedie

                            Joshua, CCNA wrote:

                             

                            Scratch that memory I listed, it's too fast for the motherboard.  I'll be getting somewhere between DDR3 1600 - DDR3 1866 mhz Dual Channel

                             

                            It doesn't matter if the RAM is "Too fast", it will simply run at the maximum speed the system bus can support: So if you put 1800Mhz RAM into a 1666Mhz motherboard bus it will run at 1666Mhz.

                            • 11. Re: GNS3 Testing IN Progress !
                              tnewshott

                              Joshua, quite honestly, I'd re-consider the choice to go AMD.  Intel's new Sandy Bridge processors, which are the second generation Core series of CPUs, are simply smoking hot both in performance and in price.  Yes, I am an Intel fan. 

                               

                              I priced out a full system minus a case and a video card for $800 on NewEgg that would crush most dynamips labs.  Tough to beat that price.

                               

                              I can say, for a single video card, only one hard drive, and only one CPU - a 1200W power supply is way overkill.  You could probably get away with a 600W-750W PSU and still run way under capacity.

                              • 12. Re: GNS3 Testing IN Progress !
                                Joshua Johnson - CCNP R&S

                                Send me a link and i'll look into what you are talking about as far as Intel goes.  I'm not going to get into a war about AMD and intel though.

                                 

                                As far as the power supply goes, it's all about scailability.

                                 

                                I was looking for more of an opinion based on incompabilities and such.

                                • 13. Re: GNS3 Testing IN Progress !
                                  Joshua Johnson - CCNP R&S

                                  I know it doesn't matter, but I don't feel like paying for more than the motherboard will accept.

                                   

                                  You do have a point though, if I overclock, at least I would know the memory can take the abuse.

                                   

                                  Mr.Snedie wrote:

                                   

                                  Joshua, CCNA wrote:

                                   

                                  Scratch that memory I listed, it's too fast for the motherboard.  I'll be getting somewhere between DDR3 1600 - DDR3 1866 mhz Dual Channel

                                   

                                  It doesn't matter if the RAM is "Too fast", it will simply run at the maximum speed the system bus can support: So if you put 1800Mhz RAM into a 1666Mhz motherboard bus it will run at 1666Mhz.

                                  • 14. Re: GNS3 Testing IN Progress !
                                    tnewshott

                                    Nope, not trying to start an Intel vs AMD war, to each their own.  If you are comfortable with AMD, then by all means go for it!  I just wanted to throw the new Core processors out there in case you had not seen them.  Specifically the Core i7 2600K, otherwise just known as the 2600K.  K meaning the multiplier is unlocked, and people have been hitting 5Ghz with this CPU on P67 motherboards.  That is a $320 CPU on a $150 motherboard, running 5Ghz, quad core with hyperthreading.  It's crazy - even a conservative OC of just 1Ghz still puts you at 4.4Ghz. 

                                     

                                    Since you're running Windows the ATI graphics card isn't much of an issue.  If you were to ever want to run Linux you may encounter a few issues, not sure what their support is like for that card specifically.  I know Nvidia enjoys a much broader support base in Linux overall.

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