Difference between revisions of "GNS3 Network Emulator"
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* Remote host: 127.0.0.1 - host operation system where VPCS is installed | * Remote host: 127.0.0.1 - host operation system where VPCS is installed | ||
* Remote port: 20000 - VPCS1 is listening on UDP 20000 on the host operation system | * Remote port: 20000 - VPCS1 is listening on UDP 20000 on the host operation system | ||
= GNS3 emulator odds = | |||
We need to remember that GNS3 is a graphic interface on top of Dynamips emulating Cisco 7200 hardware. Therefore we need to remember about all odds: | |||
* there is no emulation of Layer1 therefore a link connection need to be hard coded as AUTO SPEED/AUTO DETECT do not work | |||
* to create/delete a connection it may require to power off a device | |||
= Issues = | = Issues = | ||
Revision as of 20:25, 10 August 2014
Notes
Gns3 > Edit > Preferences > Dynamips
- Enable ghost IOS support - memory mapping allows loaded images in RAM to be shared between other routers
Connect to Router console
GNS3 (dynamips hypervisor) is listening on IP 127.0.0.1 ports starting from 2501. Therefore to emulate AUX serial connection we need to telnet 127.0.0.1 port_number. See an example below:
piotr@piotr-x:~$ telnet 127.0.0.1 2504 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. Connected to Dynamips VM "R3" (ID 3, type c7200) - AUX port Press ENTER to get the prompt.
Configure VPC
Run vpcs in a terminal, then using 1, 2 ... 10 switch between virtual PCs. Use ? at the end of the command for help.
Configure static IP address/mask in CIDR notation and GW
VPCS[1]> ip 10.0.10.10 10.0.10.1 24 Checking for duplicate address... PC1 : 10.0.10.10 255.255.255.0 gateway 10.0.10.1
Show current IP configuration
VPCS[2]> show ip all NAME IP/MASK GATEWAY MAC DNS VPCS1 10.0.10.10/24 10.0.10.1 00:50:79:66:68:00 VPCS2 192.168.1.100/24 192.168.1.254 00:50:79:66:68:01 VPCS3 0.0.0.0/0 0.0.0.0 00:50:79:66:68:02
Show all info including lport (listen on port)
VPCS[2]> show NAME IP/MASK GATEWAY MAC LPORT RHOST:PORT VPCS1 10.0.10.10/24 10.0.10.1 00:50:79:66:68:00 20000 127.0.0.1:30000 fe80::250:79ff:fe66:6800/64 VPCS2 192.168.1.100/24 192.168.1.254 00:50:79:66:68:01 20001 127.0.0.1:30001 fe80::250:79ff:fe66:6801/64 VPCS3 0.0.0.0/0 0.0.0.0 00:50:79:66:68:02 20002 127.0.0.1:30002 fe80::250:79ff:fe66:6802/64
Configure GNS3 - host
In GNS3 you need to add a Host (cloud group device) to your topology. Then right click to configure. Go to NIO UDP tab. To establish connection with VPCS1 select:
GNS3 VPCS1
local port remote port
| |
nio_udp:30000:127.0.0.1:20000
|
remote host
Explained from point of view of GNS3 (host device on the topology)
- Local port: 30000 - gns3's host device listens on UDP 30000 port
- Remote host: 127.0.0.1 - host operation system where VPCS is installed
- Remote port: 20000 - VPCS1 is listening on UDP 20000 on the host operation system
GNS3 emulator odds
We need to remember that GNS3 is a graphic interface on top of Dynamips emulating Cisco 7200 hardware. Therefore we need to remember about all odds:
- there is no emulation of Layer1 therefore a link connection need to be hard coded as AUTO SPEED/AUTO DETECT do not work
- to create/delete a connection it may require to power off a device
Issues
- Cannot cloase New Project window in Ubuntu 14.04
wmctrl can close a window based on a substring or exact match of the window title wmctrl -c 'substring' or wmctrl -F -c 'exact match'
sudo apt-get install wmctrl wmctrl -l 0x03000002 0 piotr-x XdndCollectionWindowImp 0x03000007 0 piotr-x unity-launcher 0x03000011 0 piotr-x unity-panel 0x03000016 0 piotr-x unity-panel 0x0300001b 0 piotr-x unity-dash 0x0300001c 0 piotr-x Hud 0x0280000a 0 piotr-x Desktop 0x03200012 0 piotr-x GNS3 0x0320001d 0 piotr-x New Project 0x0320002a 0 piotr-x New Project 0x03200098 0 piotr-x New Project 0x0400000b 0 piotr-x piotr@piotr-x: ~ wmctrl -c 'New'
- Cannot find New Project window in Ubuntu multiple screen setup
A: Show all desktops overview and drag the windows in physical view of the main screen. Usually your laptop screen is smaller than an external monitor causing that a part of the screen is only logical and does not have a physical screen size.