https://craftednetworks.work/2026/08/31/sp-b-igp-foundation-dual-stack-is-is-l2-for-a-modern-service-provider-core/Yet another Blogen2026-08-31T23:56:52+00:00SP-B IGP Foundation: Dual-Stack IS-IS L2 for a Modern Service Provider CoreNetwork, networking, technology, cisco, IS-IS