Virtual Network Interface Card To manage the life cycle of an application container, the Layer 3 routing model that supports one container per internal logical interface is used. This means that a virtual Ethernet pair is created for each application, and one interface of this pair, called the Virtual Network Interface Card (vNIC) is part of the application container. NIC is the standard Ethernet interface inside the container that connects to the platform data plane for the sending and receiving of packets. Cisco IOx is responsible for assigning the IP address and unique MAC address for each vNIC in the container. The vNICs inside a container are considered as standard Ethernet interfaces.
ERSPAN Support on the AppGigabitEthernet Port Encapsulated Remote Switch Port Analyzer (ERSPAN) support on an AppGigabitEthernet port enables the mirroring of data traffic from a device to an application that runs on the AppGigabitEthernet port by using IOx. The Cisco IOx process must be running before the IOx virtual application can be hosted on a Cisco device. Note Multicast Routing on the AppGigabitEthernet Interface Multicast traffic forwarding is supported on the AppGigabitEthernet interface. Applications can select the networks that allow multicast traffic. Multicast traffic forwarding is enabled through the IOS CLI and the package.yaml file.
If a platform supports multicast routing; but the network does not support multicast, an activation error message is displayed. On some platforms, to enable multicast routing, you must disable IGMP snooping. If multicast traffic forwarding is enabled on an app in a network, you cannot activate another app on the same network, without enabling multicast on that app.
Application Hosting Virtual Network Interface Card Network Type Supported Platform and Release Cisco IOS Network Address Translation (NAT) • Catalyst 9300 Series Switches and C9300L in Cisco IOS XE Gibraltar 16.12.1 • Catalyst 9400 Series Switches in Cisco IOS XE Amsterdam 17.1.1 On both these platforms, NAT is supported through the hardware data-port features applied on the front-panel data ports and on the AppGigabitEthernet port. Cisco IOx NAT Not supported Application Hosting 13