GNS3 – Assign an IP Address to Linux Microcore QEMU Guest
KB ID 0000932 Problem The whole point of having these guest machines is for testing communications, putting an IP address on them so you can ping things, is a pretty basic step. Solution 1. Console in, and execute the following commands, obviously change the IP addresses to the ones you require. sudo su ifconfig eth0 10.10.10.10 netmask 255.0.0.0 up route add ip default gw 10.10.10.1 route add default gw 10.10.10.1 Related Articles,...
GNS3 – Routers Lose their Certificates When Restarted
KB ID 0000955 Problem I was doing some work with PKI and routers today, and after spending ages enrolling all my routers for certificates, I thought I’d save my hard work and return to it later. When I started the project up again, I was less than happy all the devices certificates had ‘Disappeared’! Solution This is default behavior, to change this select Edit > Preferences > Dynamips > Locate...
GNS3 – Error ‘ghostsize is to small for device’
KB ID 0000935 Problem While doing a quick lab in GNS3, I tried to add NAT to a router, and it fell over with the following error; R3(config-if)#ip nat outside % NBAR ERROR: parsing stopped % NBAR Error : Activation failed due to insufficient dynamic memory % NBAR Error: Stile could not add protocol node %NAT: Error activating CNBAR on the interface FastEthernet0/0 R3(config-if)# *Mar 1 00:01:11.655: %SYS-2-MALLOCFAIL: Memory...
GNS3 – Network Cards Are Missing
KB ID 0000964 Problem Like most techies, I am always fiddling with things. One of my mottoes is “If you never break anything, you never learn how to fix things”. So after messing around with the networks in VMware Workstation (What I typically use for connecting GNS3 to either real machines, or the outside world). I lost the network connections in GNS3 and could not get them back. Seems like any new NICs that you add are...
GNS3 – Can’t Save ASA Config – ‘%Error copying system:/running-config (Not enough space on device)’
KB ID 0000987 Problem I love GNS3, it is a brilliant piece of software, I use it for bench testing and proof of concept work. Yes is can be a bit clunky sometimes, but it’s FREE! I had a project open with about four ASA’s on it, and it would not save the config on just one of them. HostName(config)# copy running-config startup-config Source filename [running-config]? Cryptochecksum: fdf42190 76959bba 05a6a3d6 3f900005...
Connecting GNS3 to VMware Workstation
KB ID 0000996 Problem A while back I got an email “Here is a suggestion for an article. ‘How to link GNS3 with VMware Workstation'”. Sorry it’s taken me so long to get round to it, here you go Daniel Newton. Solution Before we start I’m assuming you have installed VMware Workstation, and you’ve installed and configured GNS3. 1. Launch VMware Workstation > Edit > Virtual Network Editor > By...