What protocol is used in the Cisco SD-Access solution for scalable connectivity?
Locator/ID Separation Protocol (LISP)
LISP is specifically designed to enhance the control plane in network architectures.
What does LISP separate in network architectures?
Device identity (Endpoint Identifier or EID) from its location (Routing Locator or RLOC)
This separation allows for increased flexibility and scalability.
What is the role of LISP in the Cisco SD-Access solution?
To provide scalable and efficient connectivity within the fabric
LISP acts as a control plane protocol.
True or False: LISP is a proprietary protocol.
False
LISP is an industry-standard protocol.
Fill in the blank: LISP stands for _______.
Locator/ID Separation Protocol
This protocol is crucial for managing device identities and locations.
What are the two main components of Cisco’s fabric architecture?
Underlay network and overlay network
These components work together to provide a scalable, flexible, and efficient networking solution.
What does the underlay network represent?
The physical infrastructure that forms the foundation of the fabric
It consists of physical network devices such as switches and routers, their physical connectivity, and routing protocols.
What is the role of the underlay network in Cisco’s fabric architecture?
Establishes the transport infrastructure over which the overlay network operates
It includes the physical devices and their interconnections.
What does the overlay network abstract?
The underlying physical infrastructure
This abstraction allows for more flexible and dynamic allocation of network resources.
How is the overlay network implemented?
Using virtualization and encapsulation techniques
This allows for the creation of a logical network on top of the physical infrastructure.
Fill in the blank: The underlay network consists of physical network devices such as _______.
switches and routers
True or False: The overlay network operates independently of the underlay network.
False
The overlay network relies on the underlay network for its transport infrastructure.
What does VXLAN stand for?
Virtual Extensible LAN
VXLAN is a network virtualization technology that allows the creation of a virtualized Layer 2 network over a Layer 3 infrastructure.
What is the role of VXLAN tunnel endpoint (VTEP) devices?
To map tenants’ end devices to VXLAN segments and to perform VXLAN encapsulation and de-encapsulation
VTEP devices are crucial for enabling the communication of virtual machines across different network segments.
How many interfaces does each VTEP function have?
Two interfaces
These interfaces include a switch interface for local LAN communication and an IP interface for transport over the IP network.
What is the function of the switch interface in a VTEP?
To support local endpoint communication through bridging
This interface allows devices within the same local area network to communicate directly.
What is the function of the IP interface in a VTEP?
To connect to the transport IP network
The IP interface enables communication across different networks by using standard IP routing.
Fill in the blank: VXLAN uses _______ to perform encapsulation and de-encapsulation.
VXLAN tunnel endpoint (VTEP) devices
This process is essential for creating virtual networks that can span across physical network boundaries.
What type of solution is VXLAN?
VXLAN is a MAC-in-UDP type of solution.
What does VXLAN permit regarding Layer 2 information?
VXLAN permits the encapsulation of the Layer 2 information into Layer 3 using UDP.
What does VXLAN allow for in terms of network infrastructure?
VXLAN allows for flexible overlays that contain the Layer 2 information.
Why might you need to use VXLAN in a routed network?
To extend the Layer 2 information from one part of the routed network to another.
Fill in the blank: VXLAN permits the encapsulation of Layer 2 information into Layer 3 using _______.
UDP
True or False: VXLAN can only be used within a single Layer 2 network.
False
