Downgrades - Cisco Catalyst 9400 System Management Configuration Manual

Smart Licensing Using Policy
Transport type Before Upgrade
Default (callhome)
smart
Not applicable
For example, if the existing
licensing model is RTU.
How Upgrade Affects the Token Registration Process
In the earlier version of Smart Licensing, a token was used to register and connect to CSSM. ID token
registration is not required in Smart Licensing Using Policy. The token generation feature is still available in
CSSM, and is used to establish trust when a product instance is directly connected to CSSM. See
Directly to

Downgrades

To downgrade, you must downgrade the software version on the product instance. This section provides
information about downgrades for new deployments and existing deployments (you upgraded to Smart
Licensing Using Policy and now want to downgrade).
New Deployment Downgrade
This section applies if you had a newly purchased product instance with a software version where Smart
Licensing Using Policy was already enabled by default and you want to downgrade to a software version
where Smart Licensing Using Policy is not supported.
The outcome of the downgrade depends on whether a
in the Smart Licensing Using Policy environment, and further action may be required depending on the release
you downgrade to.
If the topology you implemented while in the Smart Licensing Using Policy environment was "Connected
Directly to CSSM", then a trust code installation can be expected or assumed, because it is required as part
of topology implementation. For any of the other topologies, trust establishment is not mandatory. Downgrading
product instances with one of these other topologies will therefore mean that you have to restore licenses to
a registered and authorized state by following the procedures that are applicable in the Smart Licensing
environment. See
page 108
License or License State Before
Upgrade
evaluation
SLR
registered
evaluation
SLR
registered
Not applicable
For example, if the existing
licensing model is RTU.
CSSM.
Table 10: Outcome and Action for New Deployment Downgrade to Smart Licensing, on
below.
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
How Upgrade Affects the Token Registration Process
Transport Type After Upgrade
cslu (default in Smart Licensing
Using Policy)
off
callhome
off
off
smart
cslu
Trust Code was installed while you were still operating
Connected
107