Here's the running-configs from the three 7200s I'm using and the. Now I'm just trying to get CCP to discover my devices properly, it takes a long time to discover the first device (and sometimes it occurs with errors), and I cannot get it to discover devices beyond the first one. Anyway, I'd found a youtube video by Keith Barker that explained how to add persistent routes to my pc and it solved the reachability problem. I don't have actual Cisco devices that'd work for this kind of study and can't afford them at the moment so I am attempting a strictly virtual implementation. I didn't know that in order to communicated beyond the first router connected to the cloud, that you'd have to have persistent routes configured on the pc that GNS3 is running on. You're right to think about router print as a tool to see what's happening. It's a big topic in the newest version of CCNA Security. You can install it on a pc and use the gui to monitor and manage devices. CCP is Cisco's replacement for Security Device Manager, it's Cisco Configuration Professional. Output of route print on PC running ccp would be useful (to show that its default gateway is the attached interface on R1 OR to prove that you have added a route on the PC to tell it how to get to the places it can't ping. or show run from GNS3 console would be nice So the problem is this: CCP cannot detect any routers beyond it's own gateway.CCP? It's killing me, because I want to use this as a basis for all my CCNA Security labs. All the routers can ping and reply to each other, but the only one that replies to pings from the loopback is it's own gateway (It's like the gateway is not forwarding or routing any information that ORIGINATES from the loopback adapter), the routers can ping the loopback adapter but the loopback adapter cannot ping beyond the gateway. Upon careful inspection, I've noticed that no pings succeed beyond this same gateway. So the problem is this: CCP cannot detect any routers beyond it's own gateway. The problem is that it cannot discover any routers beyond that. I have ccp running on my pc and it can discover the router that the cloud is connected to. I am routing all of the directly connected subnets through the use of eigrp and all 3 routers can talk to each other. I have the three routers connected to each other through serial links, and have a cloud connected to one of them (which is using MS Loopback adapter on Windows 8). The little lab I have set up consists of 3 c7200 series routers that are running this version of Cisco IOS- c7200-advipservicesk9-mz150-1M I have an image for all of the devices that can be supported on gns3, I'm working on ccna security 640-554. Last edited by rednectar on Sat 5:01 am, edited 1 time in total.Nice to meet everyone, this is my first post on this board. I do not know much about the filter but I do know that it took me forever to find a post on this. If you'd like a better explanation google DNE Lightweight Filter and do some research. I do not understand the feature and cannot explain why it works. I'd do a packet capture on the loopback interface using wireshark and there was nothing!įIX: Go to loopback properties and remove the check beside the line that reads "DNE Lightweght Filter" For some reason this setting, when checked, filters traffic coming in from GNS3. My issue was that NO TRAFFIC was being passed between the router and the cloud. You can actually run GNS3 with the firewall on as long as the proper rules are in place. Nor was I facing a permissions issue or a firewall issue. R1 - īoth devices have IPs configured for same subnet. Every time I reinstall GNS3 whether it be standalone or all-in-one I run into a problem when my router cannot ping the MS loopback adapter.
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