11/7/2023 0 Comments Gns3 ubuntu githubThe Ubuntu 22 nodes are drawn from an Ubuntu 22 master and only have ssh and iperf on them. The reader is trusted to know how to configure zebra routing on frr (I only use zebra routing) and ip addresses, static routing on the Ubuntu 22 devices. The post may get hosed up by some special characters so I have to alter some text to remove things like tildas and pound signs,Microsoft Word page breaks, and basically any non alphanumeric characters. The post may not include those items if github blocks me from uploading them. This post should include custom made charts from Microsoft Excel and I will not say how I created them – for multiple reasons. This post should includes custom made reports from Windows 10 and I will not say how I created them – for multiple reasons. I see NOTHING wrong and it is what I would expect. The “only” think I am concentrating is on the drop between locally connected (Test 1) and 1 hop away (Test 2) The “actua”l bandwidth numbers I believe can be ignored because my computer is very old. I see a 280M to 218M drop and after the first hop and I can easily explain that away after I relearn C and bridge.exe and Python (I do not know how ubridge is called). I am only getting involved because I am learning ubridge.exe. Since I saw no 5% bandwidth drop, I believe there was no reason for me to proceed. I see no 50% bandwidth drop after the first hop. (Test 2) Ubuntu 22 to Frr (frrrouting/frr: latest and latest is today 20220811) to Ubuntu 22.(Test 1) Ubuntu 22 to Ubuntu 22 (to establish a gns3, not ubridge only, baseline).On Windows 10 with Vmware Workstation 16.2.1, on my 12 year old computer, worth $0, I ran the gns3-internal-topology iperf tests, for Can somebody confirm this behavior and perhaps suggest a fix? I do realize this is a virtualized topology and I don't expect full throughput between devices, however, a 50% throughput hit for each traversed device is a bit excessive. This is obviously some sort of issue with the underlying virtualization layer. They all experience the same type of throughput degradation the more hosts they traverse. It doesn't matter the type of host I use, Windows, Linux, IOS, IOS XR, etc. This performance degradation has existed for many years over many different versions of GNS3. If I continue in this manner I can get down into the single digits for throughput between hosts, which is obviously not good. Using iperf3 between the two outermost host1 and host4 and using host2 and host3 as a transit I can achieve throughput of around 250Mbps, which is roughly half again. Using iperf3 between the two outermost host1 and host3 and using host2 as a transit I can achieve throughput of around 500Mbps, which is roughly half.Īdditionally, if I have a back-to-back-to-back-to-back topology like this: However, if I have a back-to-back-to-back topology like this: Using iperf3 between the two hosts I can achieve throughput close to 1Gbps, which is fine. If I have a back-to-back directly connected topology like this: I'm currently running GNS3 v2.2.33.1 on Ubuntu 22.04.
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