Supported Interface Types for External Router Connections
Question
Which two types of interfaces are supported on border leaf switches to connect to an external router? (Choose two.)
Answers
Explanations
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A. B. C. D. E.BE.
The Cisco Application Centric Infrastructure (ACI) is a software-defined networking (SDN) solution that provides centralized management of the network infrastructure. The ACI architecture is based on a spine-leaf topology, where the spine switches provide connectivity between the leaf switches. The leaf switches are connected to the endpoints and the external network through border leaf switches.
The border leaf switches are responsible for connecting the ACI fabric to external networks, such as the internet, other data centers, or other IP networks. To achieve this, the border leaf switches need to have interfaces that can support the external routing protocols and provide connectivity to the external devices.
The two types of interfaces that are supported on border leaf switches to connect to an external router are:
Subinterface with 802.1Q tagging: This type of interface allows you to create multiple logical interfaces (subinterfaces) on a physical interface, each with a different VLAN ID. This allows the border leaf switch to connect to the external router using a trunk link, where each VLAN represents a different network or subnet. The 802.1Q tagging is a standard protocol for VLAN tagging that is supported by most network devices.
Switch Virtual Interface (SVI): This is a virtual interface that represents a VLAN on a switch. The SVI allows the switch to route traffic between VLANs and to the external network. The SVI is configured with an IP address that is used as the default gateway for the devices connected to the VLAN.
Therefore, the correct answers to the question are B. subinterface with 802.1Q tagging and E. Switch Virtual Interface. The other options are not suitable for connecting to an external router.
- A. Subinterface with VXLAN tagging: VXLAN is a tunneling protocol used to overlay virtualized networks over a physical network. It is not used for connecting to external routers.
- C. FEX host interface: FEX (Fabric Extender) is a module that extends the capabilities of the switch and allows for additional ports. It is not used for connecting to external routers.
- D. Out of band interface: This type of interface is used for management purposes only and is not used for data traffic.
