IKEv2 DDOS documentation for IOS XE

I've been going through the book "IKEv2 IPsec Virutal Private Networks" and they discuss IKEv2's ability to prevent DDOS. However they don't go into much detail.

I found this cisco article was shows some good implementation and monitoring but I couldn't find anything to reference IOS XE.

https://www.cisco.com/c/en/us/td/docs/wireless/asr_5000/21-2/IPSec/21-2-IPSec-Reference/21-2-IPSec-Reference_chapter_010011.pdf

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Does anyone know of anything?

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EDIT:

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ANSWER -

https://www.cisco.com/en/US/docs/ios-xml/ios/sec_conn_ikevpn/configuration/15-1mt/Configuring_Internet_Key_Exchange_Version_2.html#GUID-8412F9B6-A3E2-4C28-A6E3-1A995FF71500

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EDIT2 : All I had to do was keep reading as this is all addressed in page 200 something