Cisco Smart Licensing

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Call Home vs Smart Transport (Smart Licensing)

✅ 1. Purpose & Role

Call Home

  • Originally designed as a generic messaging and alerting mechanism (e.g., TAC alerts, diagnostics, telemetry).
  • Later adapted as a legacy transport option for Smart Licensing.
  • Still works, but not the preferred method for modern Smart Licensing workflows.
    [homeinteriorz.com], [interior-designy.com]

Smart Transport

  • A transport mechanism created specifically for Smart Licensing communication with Cisco CSSM.
  • Provides more reliable and streamlined license registration, reporting, and authorization.
  • Recommended by Cisco as the default licensing transport.


  1. iscoasa(config)# license smart
ciscoasa(config-smart-lic)# 

  2. ciscoasa(config-smart-lic)# transport type smart
or   ciscoasa(config-smart-lic)# transport type callhome



The system periodically synchronizes license information with Cisco Smart Software Manager. Normal license communication occurs every 30 days, but with the grace period, your appliance will operate for up to 90 days without calling home.


  • Default Smart Transport URL: https://smartreceiver.cisco.com/licservice/license on TCP port 443
  • Smart Call Home Transport URL: https://tools.cisco.com/its/service/oddce/services/DDCEService on TCP port 443 (and port 80 for HTTP)
  • CSLU / On-Premise Local URL: http://<ip-address>/cslu/v1/pi/<tenant-id> (configured locally when pointing to an internal server) 

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