Just FYI, we're running16.09.03: I found the reference in google, and 
considered it antique.

On 2021-01-10 12:39 a.m., Erik Auerswald wrote:
> In my experience, asking about token-bucket algorithm details is often
> a sign for the asker to not see the forest for the trees.
>
>> The very first Cisco manual I found in a Google search explained how
>> to */set/* excess burst size (!)
>>
>> https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_plcshp/configuration/12-4/qos-plcshp-12-4-book.pdf  
> IOS 12.4 is quite old.  I do not expect current documentation to have
> improved significantly, but IOS 12.4 was a thing well before CoDel existed.
>
Looking at the current manual set, it emphasizes "Weighted Random Early 
Detection", and does not discuss the token-bucket algorithm at all, 
though pages describing QOS say it is used.

Amusingly, the page about WRED carefully repeats itself, suggesting a 
slight proofreading problem (;-)) 
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_conavd/configuration/xe-16/qos-conavd-xe-16-book/qos-conavd-oview.html


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David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
davecb@spamcop.net           |                      -- Mark Twain