: Implement Zone-Based Firewalls and advanced IPsec tunnels.
: Some "patched" versions are modified to bypass the requirement for a Cisco VIRL (now Cisco Modeling Labs) subscription or to suppress "smart licensing" nag messages that can clutter the console. viosadventerprisek9mvmdkspa1562tqcow2 patched
: This adventerprisek9 feature set includes full Layer 3 routing capabilities such as OSPF, EIGRP, BGP, and advanced security features like Zone-Based Firewalls. : Implement Zone-Based Firewalls and advanced IPsec tunnels
: The "SPA" indicates a digitally signed production image from Cisco. Typical Installation (EVE-NG) : The "SPA" indicates a digitally signed production
Historically, engineers relied on , which emulated real MIPS hardware to run actual Cisco IOS binaries. This was resource-intensive and limited to older hardware models. Modern virtualization has shifted toward vIOS , where the IOS code is compiled specifically to run as a virtual machine on x86 hardware.
: Supports Layer 2 encapsulations such as EoMPLS (Ethernet over MPLS) and L2TPv3 .