routeprotocol.com

CCNP Enterprise Core (350-401)

  • Connecting Lightweight AP to WLC

    For a Cisco Lightweight Access Point to function, it must connect to a Cisco Wireless LAN controller. The access point must discover the wireless LAN controller and bind itself to it in order to function. A Cisco lightweight access point is designed to be ‘touch-free’; meaning it can be unboxed and connected to the wired…

  • Cisco Wireless – Lightweight Topology

    In lightweight mode, a Cisco access point can’t provide a working BSS for wireless users. In order for a Cisco wireless access point in lightweight mode to become functional, it must join a Cisco Wireless LAN Controller to become active. This dependency on a Cisco WLC is known as a split-MAC architecture: The access point…

  • Cisco Wireless – Autonomous Topology

    An autonomous access point is self contained offering a fully functional basic service set (BSS). They are a natural extension to a switched network and can offer wireless service set identifiers (SSID) to connect to wired virtual local area networks (VLANs) at the access layer. The autonomous access point provides a short and simple path…

  • Wireless LAN Topologies

    Cisco Wireless Access Points can operate in two modes, autonomous or lighweight. The mode that a Cisco Wireless Access Point operates in depends on the software image that has been installed onto the device. Autonomous access points are self-sufficient and standalone, but lightweight access points rely on a controller device to operate sufficiently.

  • Carrying Data Over RF Signals

    The basic RF signal is known as a carrier signal, it is used to carry useful information. In terms of wireless, a wireless LAN signal carries data. To add this data to the wireless carrier signal, the frequency of the original carrier signal must be preserved but some altering occurring to signify a 1 or…

  • Wireless Signals and Modulation

    With a wired link, a electrical signal is applied at one end and carried to the other end. This is simple for the wire as it’s continuous and conductive. There is no wire for a wireless link, so it is not as continuous or conductive. A wireless link send signals in a steady up and…

  • VXLAN With Static Unicast Underlay

    VXLAN can be configured without multicast. It can be configured simply by pointing one router towards another using unicast. User-Device-1 can ping User-Device-2 in the same subnet, despite there no being no routing between them. User-Device-1#ping 10.1.1.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds: !!!!! Success…

  • VXLAN with Multicast Underlay

    One of the control planes with VXLAN is with a Multicast Underlay; this is how it was configured. The goal is to allow User-Device-1 on 10.1.1.1 to communicate on User-Device-2 on 10.1.1.2 via VXLAN, making both devices appear as if they were in a single broadcast domain. Site-1 and Site-2 are the enterprise owned routers.…

  • Cisco Software Defined Access (SD-Access)

    Cisco Software Defined Access is an example of VXLAN implementation with the LISP control plane. VXLAN specific originated from Layer 2 LISP specification that aimed to introduce Layer 2 segmentation support to LISP. LISP encapsulation can only support IP in IP over UDP encapsulation, whilst VXLAN can encapsulate the original ethernet header to perform MAC…

  • Virtual Extensible Local Area Network (VXLAN)

    VXLAN is an overlay data plane encapsulation scheme developed to address the various issues seen in layer 2 networks. It can extend Layer 2 and Layer 3 overlay networks over a Layer 3 underlay network, using MAC-in-IP/UDP tunnelling. Each overlay is known as a VXLAN segment. IANA (Internet Assigned Numbers Authority) gave VXLAN the UDP…