By default each AP is automatically assigned to a default AP group named “default-group” and WLANs IDs (1-16) map to this default group. When customized AP groups are defined on a WLC, the APs must be manually assigned to the AP group. If WLCs with switchover are deployed, each WLC SSO pair is considered a single mobility peer. When you enable LAG, the WLC sends packets out on the same port on which it received them.
The client only has to perform a WPA2 4-way handshake in order to derive new encryption keys. As a Cisco best practice it is recommended that the customized AP group configurations on the primary, secondary and tertiary WLCs be consistent. If an AP joins a WLC with an undefined AP group name, the AP maintains its assigned AP group but will inherit any configurations applied to the default-group.
Cisco Flex 7500 Wireless Controller
Centralized management allows you to create configurations for all your devices that can be quickly and easily applied to new endpoints if one would physically fail. Firmware can also be updated en masse across an organization, and alerts can be configured to help you identify specific problem areas. This can take time to plan out your access and routing policies but will be well worth it in the management phase of your deployment. You may encounter times when certain access rules need to be specified to make sure devices work. If a company device connects to the guest Wi-Fi, will their corporate email still work?
Note Cisco does not support deploying local mode APs using a centralized WLC over a wide area network. If remote APs need to be supported over a WAN, Cisco recommends implementing the FlexConnect architecture. The VideoStream feature makes the IP multicast stream delivery reliable over the air, by converting the broadcast frame over the air to a unicast frame.
Enterprise Wireless: Solutions, Limitations & Alternatives
An MSK is still derived on the client supplicant and RADIUS server from the initial 802.1X/EAP authentication phase . When you use WPA2-PSK instead of an EAP authentication method, the PSK is the MSK. Fast roaming is performed by avoiding 802.1X/EAP authentications during a roam. CCKM can be implemented with all of the different encryption methods available for WLANs including WEP, TKIP, and AES.
Mobility groups are used to help facilitate seamless client roaming between APs that are joined to different WLCs. The primary purpose of a mobility group is to create a virtual WLAN domain in order to provide a comprehensive view of a wireless coverage area. The equivalent WISM2 design consisting of two Catalyst 6500 series chassis in a VSS configuration each with a WiSM2 module installed.
Flexible, Cloud Native Networking is Here – Light Reading
In this example each pair of WLCs are connected to the distribution / core layer switches servicing each group of buildings. The distribution / core layer switches are Catalyst switches configured as multilayer or VSS that are interconnected using layer 3 links. Figure 2-38 shows the recommended WLC placement for a CUWN deployment for a small campus network implementing a distribution layer operating as a collapsed core. The distribution layer provides connectivity to the WLCs, WAN and Internet edge. Depending on the size of the LAN, the WLCs may connect directly to distribution layer or be connected by means of a dedicated switch block . The small campus in this example is a single building with multiple access layer switches.
- Unlike LWAPP which operated in either a Layer 2 or Layer 3 mode, CAPWAP only operates in Layer 3 and requires IP addresses to be present on both the AP and WLC.
- In almost all cases for enterprise wireless, you’ll be using a centralized on-premises and/or cloud-hosted controller to manage your access points.
- Devices may regain a signal or choose the weaker of two points and stay connected to that poor signal.
- Watch this introduction video to learn about how ExtremeCloud IQ can help your organization increase network performance and insights, reduce cost and complexity, and eliminate downtime.
- Note By default, DTLS uses a RSA 128-bit AES / SHA-1 cipher suite which is globally defined using the config ap dtls-cipher-suite command.
- Which wireless technology is used to enable 802.11a-ht and 802.11m network speeds.
The process is identical to inter-subnet roaming shown in Figure 2-32 where the roamed client’s traffic is tunneled to the anchor WLC. All ICMPv6 RS, NA and NS packets are tunneled to the anchor WLC so that the IPv6 client can maintain its original VLAN and IPv6 address providing a seamless roaming experience. The configuration for IPv6 mobility is the same as for IPv4 mobility and requires no separate software on the client side to achieve seamless roaming. The only required configuration is the WLCs must be part of the same mobility group.
WLC Broadcast and Multicast Details
Don’t get me wrong, all the documentation is there it just takes quite a bit of time to read everything and make the determination. That said, doing upgrades can be a little time intensive, but https://www.globalcloudteam.com/ not that much worse than any other system we maintain. Local generally means a network that is contained within a building or campus, representing a geographical or functional construct.
APs connected to WLC-1 and WLC-2 are configured to use WLC-BACKUP as their secondary WLC. Cisco Prime Infrastructure 2.2 is available for purchase as a virtual or physical appliance. The virtual appliance can be installed on top of VMware’s industry-standard hypervisor and is available in multiple versions to support networks of different sizes. A physical appliance is also available for large network deployments, when dedicated CPU and memory resources are required. Application visibility—Configures and used as a source of performance data embedded Cisco instrumentation and industry-standard technologies to deliver networkwide, application-aware visibility. These technologies include NetFlow, Network-Based Application Recognition 2 , Cisco Medianet technologies, Simple Network Management Protocol , and more.
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A CUWN provides a more intelligent and efficient implementation by centrally caching and managing the clients PMKs. For this to function the APs must be under common administrative control, with a centralized device that caches and distributes the PMKs to all of the APs in the WLAN system. For a CUWN, the WLC performs this task for all which of the following enterprise wireless deployment the CAPWAP APs under its control and uses mobility messaging to exchange PMKs between other WLCs within its Mobility group. If the second WLC does not have access to the original VLAN the client was on, a Layer 3 roaming event will occur. All traffic from the client must be tunneled using a mobility tunnel to the anchor controller.
Distributing the WLCs spreads the MAC, ARP and ND processing and table maintenance between the distribution layer switches reducing CPU load. This architecture also allows for faster convergence during a distribution layer failure as only a subset of the entries need to be re-learned by the affected distribution layer. If the campus deployment supports fewer than 25,000 clients, a centralized WLC architecture can be employed where the WLCs are connected to the core by means of a dedicated switch block .
Wireless Design and Implementation: Enterprise Best Practices
Cisco also supports Locally Significant Certificates to provide additional security for enterprises who wish to issue certificates from their own Certificate Authority . Rajeev Shah is the Co-Founder and CEO ofCelona, a Silicon Valley-based innovator of enterprise wireless networking solutions. Select the deployment model that works best with your organization, and then decide whether you want to enroll by device or by user.