topic Re: Migration from Anywhere Border node to External Border node in Software-Defined Access (SD-Access)

Migration from Anywhere Border node to External Border node

aleopoldie — Mon, 28 Jul 2025 14:59:57 GMT

Hi there,

We have standard SDA design with a fabric site including 2 border nodes with some intermediate nodes and edge nodes connected behind.

The problem is we have one border node configured as anywhere and the other one as external.

We plan to configure both border nodes as external, which means migrating the anywhere node to external. To accomplish this, we need to remove it from the fabric and then re-add it with the correct settings.

Has anyone done this before? From my experience and lab testing, this procedure shouldn’t have any impact since it only removes the overlay configuration. The remaining border node should continue to handle the fabric without issues.

It would be really helpful if someone has already gone through this process and can share their insights.

Thanks,

Re: Migration from Anywhere Border node to External Border node

Andrii Oliinyk — Mon, 28 Jul 2025 16:50:33 GMT

1st ensure that non-fabric subnets served by anywhere BN are reachable from external BN.

then safely remove ABN from fabric. in case of issues call the TAC

Re: Migration from Anywhere Border node to External Border node

aleopoldie — Wed, 30 Jul 2025 07:17:18 GMT

Thanks Andrii. We planned this change at the end of the week, I'll let you know.

Re: Migration from Anywhere Border node to External Border node

aleopoldie — Mon, 04 Aug 2025 07:39:27 GMT

Update : we did it last week, it went very smooth and it was really quick.