Just thinking out loud, when you try to change description on gateway via BAT; does the import export method cos the gateway to get deleted and then get inserted? or does it just append only the new updates? How does BAT work.
Do we have any Cisco document to support this fact?
AFAIK it is just like updating a setting on the gateway through the webpage of cucm, it does not need to delete and readd the entry in the database. The same will apply to the IP phones, if the entries are deleted and readded when updated through bulk, it may result in issues like registration failure and others. Nothing in the documentation though that describes this in detail.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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