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New Member

Cisco ACS Deployment / License question

Hi all ,

If i have ACS  CSACS-4.2-WIN-K9  and i want to upgrade to CSACS-5.5-VM-UP-K9 .

does i need any license 

CSACS-5-ADV-LIC         ACS 5 Security Group Access System License


CSACS-5-LRG-LIC         ACS 5 Large Deployment Add-on License 


Now i found that :

Large Deployment license is needed if customer has more than 500 devices (AAA clients). There is no such option in ACS 4.2

Security Group Access System license is required for Security Group Access (SGA) and 802.1AE (also known as MACsec) functions. 


but how to see how many  clients have on ACS , and i i have more that 500 i need license , and i i have less than 500 i dont need any license ?


Kind Regards



Cisco Employee

The need for license is

The need for license is checked by how many IPs are defined in the 'Network Devices and AAA clients section'

If IP ranges are not being used, then simply export the report for all the AAA devices and check the number of rows in the exported file to get a count of the network devices and hence the number of IP addresses being used.

New Member

Hi, I want to upgarde csacs



I want to upgarde csacs server from 4.x to 5.6 . Can it be done or to start 5.6 from scratch .

if i put new csacs 5.x , how to i backup database  ? any document ? will it be compatibile ?


Kind regards,


Cisco Employee

Direct upgrade is not

Direct upgrade is not possible due to the core OS change. Prior to 5.x, ACS was running on the top of Widows. With version 5.x and later, ACS is installed on the top of Linux OS (Cent OS). 

The good news is that you can migrate from 4.x to 5.x:

You can migrate to 5.6 directly from

ACS 4.1.4
ACS 4.2.1

For more info take a look at this link:


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New Member

Now regarding 5.5 i will put

Now regarding 5.5 i will put in on VMware , can i have two machines , some HA replication with same license  ?

One active , one standby , some database replication on day base level ? or similar ?

Can i use same license ?

 I bought from Cisco :


Cisco Employee

Yes, you can cluster the

Yes, you can cluster the devices together where you will only make changes on the primary ACS node. Those changes will be replicated to the secondary unit.

Each ACS appliance needs and comes with the Base license

For the cluster, you only need a single Large license


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Cisco Employee

No 2 ACS cannot be put in the

No 2 ACS cannot be put in the replication with the same license. The requirement for the ACS to be put is replication are:


1. Same version

2. Different License


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New Member

Hi , In CSACS-5.5-VM-UP-K9 ,

Hi ,


In CSACS-5.5-VM-UP-K9 , i get base license already in software ?

because i didnt get it separetly .




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