CCIE enterprise infrastructure exam is the focus of web workers. The new version of the outline involves new knowledge about SDN. Every point can be spoken for a few days. The wireless integration of SD-A is very interesting. Before the CCIE EI exam, our EI products launched the best price, now choose the best time to book this offer, because we provide a 50% discount.
The Cisco Software-Defined Access (SD-Access) solution allows consistent performance for both wired and wireless clients, including host mobility, segmentation based on virtual networks, SGTs, and so on. Cisco Digital Network Architecture (DNA) Center simplifies the Cisco SD-Access fabric deployment and provisioning including wireless integration. SD Access supports two options for integrating wireless access into the network. One option is to use traditional Cisco Unified Wireless Network local-mode configurations“over the top”as a non-native service. In this mode, the SD-Access fabric is simply a transport network for the wireless traffic, which can be useful during migrations. The other option is fully
integrated SD-Access Wireless, extending the SD-Access benefits to include wireless users.
The fabric- enabled WLC integrates with the LISP-based control plane. The control plane is centralized at the WLC for all wireless functions. The WLC is responsible for the AP image management and configuration, RRM, and client session management and roaming.
The fabric-enabled WLC performs the following functions for fabric wireless integration:
●MAC address of the wireless client is used as the EID. The WLC interacts with the host-tracking database on the control plane node for client MAC address registration with SGT and Layer 2 virtual network ID and its mapping with RLOC. The virtual network information is Layer 2 virtual network information and it is mapped to a VLAN on the fabric edge node.
●The WLC is also responsible for updating the host-tracking database with roaming information for wireless clients.
Fabric-enabled AP integrates with the VXL .AN data plane. The wireless data plane is distributed across APs. Fabric mode AP is a local mode AP that needs to be directly connected to the fabric edge node. The fabric edge node onboards APs into the fabric and forms VXLAN tunnels with the APs. The edge node also provides the anycast Layer 3 gateway for connected endpoints. For fabric-enabled SSID, an AP converts 802.11 traffic to 802.3 and encapsulates it into VXL AN, encoding the virtual network ID and SGT information of the client. The AP forwards client traffic based on forwarding table as programmed by the WLC. The AP also applies all wireless specific features like SSID policies, AVC, QoS, and so on.
It is well known that Cisco ’s wireless direction and EI direction are merged, so when you complete the EI written 350-401, you can take the wireless and EI CCIE LAB exams at the same time, but if you are taking the 400-101 written test last year , Then you can only take the EI LAB exam. Therefore, the technology shared today is very important. We will speed up the update of the EI and wireless dumps after the Cisco open exam. You can join our course reservation now to get the best discount. Now the written test information is very accurate, and we have Cisco written test activities, contact us our sales will get this opportunity. Let us continue to analyze the workflow of SD-A wireless.
Cisco SD-Access Wireless Workflow- Adding WLC to Fabric
Using the Cisco DNA Center user interface, you add the WLC to the fabric domain. The fabric configuration gets pushed to the WLC, and the WLC becomes fabric-aware. Most important, the WLC is configured with credentials to establish a secure connection to the control plane node. Then the WLC is ready to participate in Cisco SD-Access Wireless.
Cisco SD-Access Wireless Workflow- -AP Join Process
he AP is connected to the fabric edge device. You need to configure the AP pool in Cisco DNA Center. Cisco DNA Center pre-provisions a configuration macro on the fabric edge node. Once the AP is plugged in and powered up, the fabric edge node discovers that the AP is using Cisco Discovery Protocol. It then applies the macro to assign the switch port to the right VL AN. The AP obtains an IP address using DHCP and gets registered as a“special” wired host to the fabric domain.
Based on the figure, the AP join process in Cisco SD-Access wireless can be explained as follows:
1. The fabric edge registers IP address (EID) of AP and updates the control plane node.
2. The AP joins WLC using traditional methods.
3. The WLC checks if the AP is fabric- capable.
4. Upon success, WLC queries the control plane node to know if the AP is connected to Fabric domain.
5. Control plane node replies to WLC with RL OC for the AP, which means that the AP is attached to Fabric.
6. The WLC performs a Layer 2 LISP registration for the AP in control plane node to pass the important metadata information from WLC to the fabric edge node.
7. In response to the WLC Layer 2 registration, the control plane node notifies fabric edge and passes the metadata that is received from WLC. In simple terms, the metadata is a flag that indicates that the connected device is an AP and it also contains the IP address of the AP.
8. The fabric edge node processes the information that is received from the control plane node. Now, the fabric edge node learns that the device that is connected to it is an AP and creates a VXLAN tunnel interface to the specified IP address.
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