As an aside, (as I understand – heard it from a good inside source) the reason Cisco doesn’t make IOS freely available for GNS3 users is that there is code in every IOS that Cisco does NOT hold the copyright for – they pay royalties for its use. But in either case you’ll have to overcome the “IOS” problem. If hiring lab-time is not suitable, I think your best best is GNS3 WorkBench or even the GNS3 application itself (it runs just fine on OS X). These are web-based, so not OS dependant. Commercial simulators – there are a few but I don’t use them and I don’t expect they’d work on OS X.Ĥ. Cisco Packet Tracer – PC only and only be legally used by students attending a Cisco Academy courseģ. Cisco IUO in a VM – even more clandestine than GNS3 as far as getting images to workĢ. GNS3 WorkBench is a Virtual Machine, so it can run on PCs or Macs (It was developed on a Mac).īUT… there is the problem of getting a copy of a Cisco IOS. You could of course buy my book if you think it will be useful, or sign up for SlideShark using this link where you’ll get an extra 25MB free for using the link. I had at one stage thought of trying to set up a link to a charity, but it got too hard. type f -name -exec sed -i "s#C:\full\path\to\c3725-NEWIMAGE.image#" \ īut I don’t know if Windows has such commands.Ī. What you need to do is the windows equivalent of the linux command: find. I’ve just written a script to allow a user fix this for Linux based systems (may work on OS X) but don’t have anything for Windows yet (any Windows script writers out there wanting to take a bash script and “Windoize” it please contact me!). Lines in all the exercises and snapshots. If you look at the files that are supplied in the Windows/OS X version of GNS3 you will see that there is NO path specified in the image = Unfortunately going back to GNS3 v0.8.3 is NOT an option, because that version doesn’t support he Help features and the Snapshot features that GNS3 WorkBench now relies on. This is a real bummer – this problem was solved back in GNS3 0.8.3 and re-introduced somewhere between v0.8.3 and v0.8.6 – and since Jeremy is now busy working on GNS3 v1.0, I’m guessing there won’t ever be a real fix for this. Just wondering if I’m doing something wrong!Ī. I can fix this by editing the topology file to point to the full path, so again, it’s not a massive issue. The images that I can use have the full paths (C:\Users\Rob\GNS3\Images\imageName.image) to the image listed in the dialog, even though it’s in my specified “Images” folder. The only difference that I can see is the path. I get an option to choose the correct image, which is invariably the same file. When I load a snapshot for a topology, I get a message saying that the IOS image can’t be found. If I remembered to put the relevant startup.vpc file in the snapshot’s configs directory then the VPCs will start with the correct addresses. What happens when you load a snapshot is that the contents of the snapshot’s configs directory gets copied to the current project’s configs directory. To be honest, there are a couple of places where I meant to have IPs already configured but didn’t. Some exercises will require that the IP addresses for the VPCs, others will have pre-configured exercises. RE VPCS: When I load the exercises, am I right in thinking that I have to manually configure the IP addresses on the individual VPCs? I’ve done it no problem, and saved the config so I can quickly load it, but I’m just checking that I’m not doing anything wrong!Ī. I’ve asked Flàvio (maintainer of dynamips) to look into it again. This is a known problem with dynamips and has been reported on the GNS3 Forum. I’m using the recommended IOS for the c3725 (T10), but I’ve also tried with the T14 release and observed the same behaviour.Ī. Repeated show mac-address-table show that the table gradually removes the entries until it’s empty, normally within 30 seconds. However, when I do a show mac-address table on the switches, the CAM table either show up as completely empty or with just the last couple of MAC addresses. I got the Etherswitches and VPCs pinging each other no problem. I got some great questions from Rob Methven so I thought I’d answer them here in the form of a “Q&A”.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |