It is advised that you should configure Idle PC value for every virtual device attached and involved in the topology so that you can place and work with several virtual devices at a single given time. How To Setup IDLE PC Value In GNS3 Techtip - Website Developer 3 subscribers Subscribe 6.3K views 6 years ago How to set /calculate the correct idle pc value for gns3 Show more GNS3. This means that if a network topology created in GNS3 has three routers and only one is performing some task and other two are sitting idly only the first router will share the hardware resources of physical computers and the other two virtual devices will not. To lower the CPU usage, GNS3 needs whats called the idle-pc value of the IOS image you have. We really recommend using the c3640, c3660, c3725, c3745 and c7200 IOS images listed below, they have proven to be the most stable in GNS3 provided you use the right amount of RAM and Idle-PC value. ![]() Complimentary campus technologies such as HSRP are also supported. While this was true in the past, GNS3 now supports options such as: Etherchannel PVST+ RPVST+ MST Port Security DTP And many others. GNS3 development team understands this and therefore it has provided with the feature named Idle PC using which you can configure the devices to utilize and share resources from physical machines only when they are working. Introduction One common misconception about GNS3 is that GNS3 does not support advanced switching options. This will remarkably reduce the performances of physical computers hence giving delayed outputs. This means that if you run a few virtual devices on GNS3 CPU usage of physical computer will be more or less 100% even if the virtual devices are not performing any tasks. New issue Unable to set Idle-pc value - GNS3-GUI 2.2 with GNS3 VM 2.2 1515 Closed SNV100 opened this issue on 1 comment SNV100 commented on SNV100 changed the title Unable to set Idle-pc value - GNS3-GUI 2.2 witn GNS3 VM 2.2 Unable to set Idle-pc value - GNS3-GUI 2.2 with GNS3 VM 2. ![]() ![]() Since all the virtual devices created in GNS3 directly interact with the hardware of physical computers memory and processor of the physical machines are also shared with GNS3 virtual devices.
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