CCNP-2

Networking/Network General (Anything)

CCNP-2

포항돼지 2021. 10. 20. 18:53

Wireless LAN Design consideration

WLC랑 AP연결되면 Secret Tunneling을 통해 커뮤니케이션을 시작한다(CAPWAP Tunel)

CAPWAP 터널을 통해 Data및 Update , WLC와의 커뮤니케이션이 이뤄진다

Subnet will not be changed isn't 50 is moving

CAPWAP is recognized end user as 10.1.1.50 and it will works even he is in the WLC2 device

Intra-Controller Roaming Each controller supports same-controller client roaming across access points managed by the same controller. This roaming is transparent to the client as the session is sustained, and the client continues using the same DHCP-assigned or client-assigned IP address.

같은 서브넷의 2개의 다른 액세스 포인트에 접근하게 되면 Intra control roaming 이 일어남

Inter Controller Roaming Anchor Controller and Foreign Controller !! i got a remeber this

Inter Controller Roaming, Subnet 이 다를 경우 일어남

다른 VLAN 및 다른 브로드캐스트 도메인(Layer 2 Roaming). 어떻게 work 하는가?IP Address 안바뀌고, WLC1,2 CAPWAP을 통해 (Layer 3 Roaming) Ack 받아서 사용가능함(Anchor Controller and Foreign Controller)

CAPWAP Tunnel Transport User data traffic and administrate traffic tooWhat if Access controller is located in remote branch site and WLC is located in HQ?-> Central Swich mode(Cisco Flex Connect), Layer 2 단에는 그냥 Switch 끼리 통신하므로 Bandwidth Saving이 된다

Flex Connect Local mode allows stay in local too even layer 3

SDN

Intent base networking

Intent-based networking (IBN) is a form of network administration that incorporates artificial intelligence (AI), network orchestration and machine learning (ML) to automate administrative tasks across a network. ... Intent-based networking and software-defined networking (SDN) are similar in many aspects.

SD-WAN이랑 SD-Access 많이 알아야함 => It is big wave now

SD-WAN 은 그 위에 Virtual 하게 Network Structure 를 생성 가능 하다 (Overlay Network)

Backhauling = Access Layer , Core Layer (Transmit site,gain,antenna and Receive site,gain,antenna)

Relative with Adapted Coding and Modulation (ACM)

Fronthauling = fronthaul is same thing, connection between 2 point in mobile network. (Radio Unit , Distribution Unit)

SD WAN do firewall, encryption,bunch of other function

Intelligent way to routing and other networking

DM VPN

Dynamic Multipoint Virtual Private Network (DMVPN) is a solution which enables the data to transfer from one site to another, without having the verification process of traffic. ... This process helps the data to move from one end to another in the establishment of secured network.