Hi kamranniaz
Hope you’re doing well, I found a “discussion” at the Cisco Support Community that might be very helpful to solve your query. Please consult this link: https://supportforums.cisco.com/discussion/13338921/stackwise-bandwidth
Also I would ike to share with you the following:
Cisco recommends the use of a controller dedicated to guest traffic, this controller is known as the guest anchor controller.
The guest anchor controller is usually located in an unsecured network area, often called the demilitarized zone (DMZ). Other internal WLAN controllers from where the traffic originates are located in the enterprise LAN. An EoIP tunnel is established between the internal WLAN controllers and the guest anchor controller in order to ensure path isolation of guest traffic from enterprise data traffic. Path isolation is a critical security management feature for guest access. It ensures that security and quality of service (QoS) policies can be separate, and are differentiated between guest traffic and corporate or internal traffic.
An important feature of the Cisco Unified Wireless Network architecture is the ability to use an EoIP tunnel to statically map one or more provisioned WLANs (that is, SSIDs) to a specific guest anchor controller within the network. All traffic - both to and from a mapped WLAN - traverses a static EoIP tunnel that is established between a remote controller and the guest anchor controller.
The selection of the guest anchor controller is a function of the amount of guest traffic as defined by the number of active guest client sessions, or as defined by the uplink interface capacity on the controller, or both.
I hope this information is helpful, wish you have a great week!
