Does Catalyst 4000 support ISL? February 21, 2024 Kevin Cisco Switches FAQS / FAQS 124 Views catalyst 4000 不支持ISL,支持802.1q。 Share: FacebookTwitterLinkedInWhatsAppPinterestE-Mail Prev: What are the three-layer packet forwarding rates of Catalyst 2948G-L3, 4000, and 6000? Next: How to determine your switch engine model? Related Oops! No Related Posts.