Campus lan and Wireless lan solution Design Guide

Catalyst 9200 Series StackWise-160/80 
Catalyst 9200 Series switches enable stacking of up to 8 switches and 416 ports using a stack-ring fabric 
known as either StackWise-160 or StackWise-80. StackWise-160 is supported on Catalyst 9200 switch 
models with the support of up to 160 Gbps stack bandwidth. StackWise-80 is supported on Catalyst 9200L 
switch models with the support of up to 80 Gbps stack bandwidth.
Catalyst 9300 Series StackWise-480/360 
Catalyst 9300 Series switches enable stacking of up to 8 switches and 448 ports using a stack-ring fabric 
known as either StackWise-480 or StackWise-360. StackWise-480 is supported on Catalyst 9300 switch 
models with the support of up to 480 Gbps stack bandwidth. StackWise-360 is supported on Catalyst 9300L 
switch models with the support of up to 360 Gbps stack bandwidth.

---

© 2020 Cisco and/or its affiliates. All rights reserved. 
Page 29 of 76
EtherChannel 
EtherChannel allows multiple physical Ethernet links to combine into one logical channel, allowing for load 
sharing of traffic among the links in the channel as well as redundancy in the event that one or more links in the 
channel fail. Up to eight Ethernet ports can be combined into a single logical channel. Multichassis 
EtherChannel (MEC) and cross-stack EtherChannel extend traditional EtherChannel by allowing Ethernet ports to 
be aggregated towards different physical chassis that form a single virtual switch (StackWise Virtual pair or 
switch stack). 
Software Maintenance Upgrades (SMUs) 
An SMU is a software package that can be installed on Catalyst 9000 Series switches to provide a patch fix for 
bugs or security resolution to an already released image. The SMU type describes the effect the installed SMU 
has on the corresponding system. SMUs might not have an impact on traffic, or might result in device restart, 
reload, or switchover. Hot patching enables SMU to take effect after activation without the system having to be 
reloaded. After the SMU is committed, the changes are persistent across reloads. In certain cases, SMUs may 
require a cold (complete) reload of the operating system. This action affects the traffic flow for the duration of 
the reload. If a cold reload is required, users will be prompted to confirm the action. 
Note: 
SMUs support patching using install mode only. SMUs are only supported on long-lived extended 
maintenance releases from IOS XE 16.6.1 on.