SD-Access Questions

[DM812]

I wonder if anyone can help me out with a few queries before possible going forward with a SD-Access deployment using an existing underlay.

We have a core ring that connects all our main sites and is provided by a SP. With regards to applying QoS to the SD-Access overlay, when tagged traffic leaves the overlay on the border node to then hit the SP router to go out onto the WAN, will the QoS values be kept?

Also has anyone been through the migration of upgrading their current kit and deploying SD-Access and if so provide any feedback on the migration process? We have alot of sites and would like to weigh up the costs and testing on one of our main sites.

Thanks.

[vikparma]

Yes, the DSCP value from data packets or markings at the edge of the fabric are copied into the vxlan header till the Border. From Border, when it goes out, these are then copied back to the IP TOS header and preserved.

[jedolphi]

Regarding the feedback on migration processes, you could check the Cisco Live presentation BRKCRS-3493 which is based on real world experiences, https://www.ciscolive.com/global/on-demand-library.html?search=brkcrs-3493#/session/1571888607137001yDeW