DNAC layer 3 handoff with HA FTD

[M. G.]

Hi all, 

I am trying to set up Layer 3 handoff between cisco border node on one side and pair of FTD in HA mode on the other. The problem is that DNAC uses /30 subnet for P2P connectivity and I need minimum 3 IPs to use ( 1 on switch and 2 for active/standby FTD). If I change subnet to /29 it is all good until I try to add another VN which results in DNA overriding the configuration and reconfigure the subnets back to /30.

Is there a way to configure DNAC to use /29 instead of /30 for these links? 

[usaf_27]

This specific feature kept me from implementing SD-Access in which I made a wish on. It is now available in the 2.3.4.x version I believe.  It can now be customized. 

Per the Release notes.
“Custom Border Layer 3 Handoff IP Addressing”

[PabMar]

Hi,

Why not make the switchports trunk and let the Borders and FTDs build the BGP neighbor relationship through those trunks?

Regards.