A glorified interpreter, that reads binary code (compiled for the MIPS processor) and finds a way to "emulate" it on your PC (running an Intel or AMD processor).ĭynamips was never designed to or ever claimed to "simulate" a real world scenario. I think 1Mb/s is pretty awesome for what dynamips is - an emulator. I'm not quite sure what you mean by "throughput routing performance is so low".
Great work - thanks for the posting, and you are always welcome to link your own articles to this forum when relevant. In the test environment, GNS3/dynamips OUTPERFORMED a physical switch using gigagbit interfaces in a single switch or single router scenario. Result: 123.8164 Mb/s - clearly if this is a physical switch, then it must be using Gigabit interfaces.
~Again 100 times better than two c3725 routers!!! AMAZING - you got more that 100Mb/s through 100Mb/s interfacesĬase 4 - traffic through a physical switch - no specs of switch given (would be nice to know what we are comparing here) ~100 times better than two c3725 routers!!! AMAZING - you got more that 100Mb/s through 100Mb/s interfacesĬase 3 - traffic through just ONE 3725 NM-16ESW switch The Next Post will focus on connecting Ostinato up to the topology and using it to play with multicast.Case1 - traffic through two c3700 routersĬase 2 - traffic through just ONE 3600 router The Ostinato drone is on our network and ready to rock, we can see the drone is listening on tcp port 7878 for the Ostinato GUI and it has reachability on the LAN to the router and off to the wild and woolly internet. ) TC (\ Core is distributed with ABSOLUTELY NO WARRANTY. Login: can't change directory to '/home/tc' Run filetool.sh -b if you want to save your changes Lets fire up the Ostinato VM (I downloaded it from Bernhard Ehlers’s site – I use the qcow2 version because I’m running it as a qemu app) and see if it has world connectivity: Core Linux Within GNS3, a cloud that is attached to nio_tap:tap0 is created and the link is attached to the Ostinato VM interface e0. The follow command makes sure the gns3 user (which the GNS3 server application runs as) can control the tunnel interface (tap0) and it is added to bridge pnet0 and is enabled. This comes in handy because I can then add other interfaces to the bridge and be part of the same IP subnet. The Ubuntu Server /etc/network/interfaces configuration is a little different to most as a bridge interface is used rather than the eth0 interface directly: /etc/network/interfaces What may not be obvious is that I run GNS3 on a separate device (an desktop pc given 16GB of ram which runs Ubuntu and starts the GNS3 server upon bootup) as a remote server which I connect to via the GNS3 GUI on my PC.
Regarding the RP? Well the BSR sends all RP candidates and lets the PIM enabled routers decide themselves – in this case, lowest priority (R2) will be what matters A:R1# show router pim rp Initial Multicast Verification: A:R4# show router pim status | match " BSR" post-lines 5Īlthough R4 was a possible BSR, it knows R3 has the job. Candidate RPs for 224.0.0.0/4 are R2 (Priority 90) and R4 (Priority 100) – R2 should become the RP (Like Golf, lowest wins).Candidate BSRs are R3 (Priority 100) and R4 (Priority 90) – R3 should become the BSR (Like Basketball, highest wins).PIM is enabled on all inter-router interfaces.Here is the GNS3 Topology for this blog post: 5 SROS Router Multicast Topology with Ostinatoįor the moment let us ignore Ostinato and the Cloud parts of our topology and initially concentrate on building the network infrastructure.
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