Flashcard Set 2
(10 cards)
What is a switch called that does not participate in the SD-Access fabric but are part of it because of automation?
SD-Access Extension Node
What are required of devices in order to participate in an SD-Access fabric?
- They must support all of the hardware ASICs
- They must support Field Programmable Gate Arrays
what 2 controllers are required for SD-Access?
- Identity Services Engine (ISE)
- DNA Center
What is the purpose of the underlay network?
its sole purpose is to transport data packets between network devices for the SD-Access fabric overlay.
What is an overlay network and what is its purpose?
- It is a virtual (tunneled) network that virtually interconnects all of the network devices forming a fabric of interconnected nodes
- It abstracts the inherent complexities and limitations of the underlay network
What 3 things should be addressed when configuring the underlay network and why should they be addressed?
- Performance
- Scalability
- High availability
- Because any problems with the underlay can affect the operation of the fabric overlay.
Is it possible to use STP in the underlay network?
It is possible but it is not recommended.
What is the recommended design for the underlay network?
- Layer 3 routed access layer
- ISIS as the IGP
What 3 reasons are why ISIS is the recommended IGP for the underlay network?
- Neighbor establishment without IP dependencies
- Peering capability using loopback addresses
- Agnostic treatment of IPv4, IPv6, and non-IP traffic.
What 2 models of underlay are supported?
- Manual underlay
- Automated underlay
