License Storage Management; Cisco Catalyst 3850 Switch Stacking; Overview - Cisco Catalyst 3850 Deployment Manual

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License Storage Management

The license information is stored in two hidden flash partitions: active and backup. The following information
describes how the license information is stored and managed in the flash:
●
Customer-ordered image-level license information is stored in the factory default license file, initially created
by Cisco manufacturing.
●
The license detail file maintains the license information for all the supported licenses, including license type,
absolute usage, EULA acceptance status, and in-use state.
● License usage of the active licenses is updated once daily in the license detail file. The license right-to-
use activate and license right-to-use deactivate commands also update the license detail file.
● A checksum is maintained and verified to prevent any tampering with the license files.
● Following activation, a license remains activated during reloads and image upgrades and downgrades.
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Erasing the configuration does not affect the license file because it is hidden in the flash.
●
If the license file in the primary partition is corrupted or tampered with, the license file from the backup
partition is used.
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If both the partitions are corrupted, Cisco can recreate the license files using the factory default files.

Cisco Catalyst 3850 Switch Stacking

Overview

Cisco Catalyst 3K switches define stacking architecture for enterprise networks to expand form factors, switching
capacity, and redundancy in the wiring closet. Cisco StackWise
effective solution that delivers scale, performance, resiliency, and operational simplicity. To build the next-
generation modular stack product, Cisco made significant changes to the StackWise Plus hardware and software
architecture for the Cisco Catalyst 3850 Switch. The new Cisco Catalyst 3850 Switch is built upon high-speed next-
generation Cisco application-specific integrated circuit (ASIC) technology and combined with the feature-rich and
powerful Cisco IOS XE Software operating system.
The new StackWise-480 architecture allows you to build a high-speed stack ring with superior features and
services scalability compared with StackWise Plus. The initial software version supports physically stacking up to
four Cisco Catalyst 3850 Switches to form a stack ring. To accommodate varying port density requirements, the
hardware can support both 48- and 24-port switches in a single stack ring. The Cisco Catalyst 3850 Switch
deployed in stack mode is designed to deliver deterministic nonblocking switching performance to as many as 208
ports, including both wired and wireless network devices. The Cisco Catalyst 3850 Switch delivers uncompromised
hardware-accelerated, rich integrated borderless network services and enterprise-class system resiliency. (See
Figures 4 and 5).
© 2015 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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