Fibre Channel, or FC, is a high-speed network technology (commonly running at 1, 2, 4, 8, 16, and 32 gigabit per second rates) primarily used to connect computer data storage to servers. Fibre Channel is primarily used in storage area networks (SAN) in enterprise storage. Fibre Channel networks are known as a fabric because they operate in unison as one big switch. Fibre Channel mainly runs on optical fiber cables within and between data centers.
You will see a log message like this in case the controller software does not support the more recent access points: “Discarding primary discovery request in LWAPP from AP xx:xx:xx:xx:xx:xx supporting CAPWAP”
We downloaded the most recent version of software (220.127.116.11 at the time of writing this post) and downloaded it to the controller. We rebooted the controller and licenses were gone!
We tried to re-install the license backup file we had made before upgrading but it FAILED!
We switched back to the previous software version immediately and rebooted the controller. The Licenses were back then.
We guessed that it was because we had made a major upgrade (from version 7.4.x. to 8.2.x) so we decided to upgraded to the very first version of controller software where Aironet 3702I APs were supported for the first time. We upgraded to controller software version 7.6.110 and this time it was successful.
I don’t know if Cisco guys approve this workaround but it worked for us.
QoS is a set of techniques to manage bandwidth, delay, jitter, and packets loss for flows in a network. The Internet Engineering Task Force (IETF) defines two major models for QoS on IP-based networks: Integrated Services (Intserv) and Differentiated Services (Diffserv).
The Intserv model integrates resource reservation and traffic control mechanisms to support special handling of individual traffic flows. The Diffserv model uses traffic control to support special handling of aggregated traffic flows.
The first script is used to configure 61 Cisco Catalyst 2960S access switches for DHCP Snooping in a way that every switch builds the DHCP Snooping database with its own hostname on the FTP server so that different databases do not overwrite each other.