Introduce Unified Networking Lab

Unified Networking Lab is very good tool to simulator devices some vendor: cisco, juniper, HP, fortigate...
Unified networking lab (UNL) software to pratice lab CCIE: SP, RS, SEC..

http://www.unetlab.com/

All supported images:
A10 vThunder
Aruba ClearPass
Alcatel 7750 SR
Arista vEOS
Brocade vADX
CheckPoint Security Gateway VE
Cisco ASA (porting)
Cisco ASAv
Cisco CSR 1000V
Cisco IPS (porting)
Cisco IOS 1710 (dynamips, ethernet only)
Cisco IOS 3725 (dynamips, ethernet only)
Cisco IOS 7206VXR (dynamips, ethernet only)
Cisco IOL (for Cisco internal use only)
Cisco Titanium (for VIRL customers only)
Cisco vIOS (for VIRL customers only)
Cisco vIOS L2 (for VIRL customers only)
Cisco Virtual Wireless Lan Controller (vWLC)
Cisco Web Security Appliance (IronPort)
Cisco XRv
Citrix NetScaler
ExtremeXOS
F5 BIG-IP LTM VE
Fortinet FortiGate (new)
HP VSR1000
Juniper Olive (porting)
Juniper vMX
Juniper vSRX
Palo Alto VM-100 Firewall
VMware ESXi
VyOS
Windows host