IOSvL2

IOSvL2 is an implementation of Cisco IOS layer-2 switching code that runs as a full virtual machine. IOSvL2 images are based on the DSGS code branch and support up to 16 GigabitEthernet interfaces. IOSvL2 is primarily a Layer-2 switch, but Layer-3 control plane and data-plane functionality is also present in the image.

Supported Features

The following features have been tested and work in the IOSvL2 image:

• Layer-2 forwarding
• Switchport
• 802.1q trunk, 802.1q VLANs
• Spanning tree
• Port-Channel (pagp and lacp)
• 802.1x passthrough
• Port-ACLs
• Dynamic ARP inspection
• DHCP snooping
• IP device tracking
• Switched Virtual Interfaces (SVI)
• Layer-3 forwarding over SVIs
• Routing protocol support (ISIS is NOT supported)
• VTP v1-3
• PVST
• QoS
• Inter-vlan routing
• VLAN access maps (VACLs / access control lists for VLANs)
• ACL functionality for both layer-2 and layer-3 protocol packets
• Dynamic Trunking Protocol support
• Switchport protected mode

Unsupported Features

The following features are not supported by IOSvL2 and are known not to work:

• Port mirroring (SPAN)
• Private VLANs