que es ccna

que es ccna.In general, when a client sends a packet to Server 1, the following will happen, roughly as shown in Figure 12.10.The external controller sends the packet through the tunnel to the anchor controller instead of forwarding it. The anchor point controller then forwards the packet to Server 1. Moon Burden Server 1 responds by returning the traffic to the anchor point controller. The anchor controller then returns it to the external controller through a tunnel. The external controller then returns the packet to the client. If this client roams to another external controller, the database is transferred to the new external controller, but the anchor controller does not change.(3) Configuring the tunnelIn order to configure the tunnel, you must first decide which type of tunnel to use. The default is asymmetric mode and the controller must match its configuration. Select CONTROLLER > MobilityManagement> MobilityAnchor Config0 Figure 12-11 shows the final configuration page.This configuration page enables you to configure the Keep AliveCount and KeepAlive Interval, as well as a Symmetric Mobility Tunnel Mode checkbox, which is not enabled by default. Keep Alive Count is the number of ping commands sent to the anchor controller before the anchor controller is considered unreachable, the default value is 3. Keep Alive Interval is the time interval (in seconds, the default value is 10) between ping commands sent to the anchor controller.(4) Mobile Anchor PointsMobile anchor points are also known as guest tunnels or automatic anchor point moves. With Mobile Anchor Point, all client traffic belonging to the WLAN (especially Guest, WLAN) is tunneled to the intended WLC or set of controllers configured as anchor points for that particular WLAN. This feature restricts the clients to a specific subnet and allows for a more12.2 Basic Topics 169more control. Typically, a client is fastened to the first controller with which it is associated. But what should you do if you want to fasten a client to one of the controllers on the firewall DMZ interface? Use a move anchor to force the client to fasten to a controller, rather than to the first controller it is associated with. This will force its traffic to tunnel to the DMZO and then that traffic must pass through the firewall and its associated policies to reach the rest. This is done on a per-WLAN (per-WLAN) basis.Figure 12.11 Mobile Anchor Point Configuration