When considering the IPv6 product, I would suggest you read USGv6-Revision-1 (1) to define the specification you need for the product. Then go to the USGv6 Registry (2), select the features and read the Supplier Declaration of Conformity (SDOC) to ensure that the product meets your requirements. Do this prior to having the discussion with the vendor sales. 

Also, ask for documents which provide details on performance and security testing. It will save you hours of troubleshooting problems and patching vulnerability.  

Lessons learned from implementing IPv6 products.

(1) https://www.nist.gov/programs-projects/usgv6-program/usgv6-revision-1
(2) https://www.iol.unh.edu/registry/usgv6

Joe Klein

"inveniet viam, aut faciet" --- Seneca's Hercules Furens (Act II, Scene 1)
"I skate to where the puck is going to be, not to where it has been." -- Wayne Gretzky
"I never lose. I either win or learn" - Nelson Mandela



On Sat, Nov 20, 2021 at 2:36 AM John Lee <jllee9753@gmail.com> wrote:
Cisco and Juniper routers have had v6 functionality for over 10 years. Lucent/Nokia, and others. Check UNL list at
https://www.iol.unh.edu/registry/usgv6 for v6 compliant routers and switches.

John Lee

On Fri, Nov 19, 2021 at 5:48 PM John Levine <johnl@iecc.com> wrote:
It appears that Michael Thomas <mike@mtcc.com> said:
>And just as impossible since it would pop it out of the fast path. Does
>big iron support ipv6 these days?

My research associate Ms. Google advises me that Juniper does:

https://www.juniper.net/documentation/us/en/software/junos/routing-overview/topics/concept/ipv6-technology-overview.html

As does Cisco:

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9600-series-switches/nb-06-cat9600-ser-sup-eng-data-sheet-cte-en.pdf

R's,
John