Redirection: Load balancer or CNAME?

[Samsam0000]

We had a bunch of domains which no longer have sites tied to them but many have decent links pointing to them.

In most cases we have other relevant content on live sites we can redirect these URL's to.

We have been given the choice of redirection through the load balancer or direct as a cname on our CDN.

I only have experience of 301's - What would be the preferred choice from an SEO perspective?

Thanks,

Sam