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You’re getting MAC flaps because the ECY-300 isn’t forwarding any BPDUs, so RPVST+ can’t detect the loop and both ports stay forwarding.Cisco covers this exact behavior here: https://community.cisco.com/t5/networking-knowledge-base/importance-of-bpdu...
Sorry for the late reply, Michael.If your P2P links are meant to run as pure Layer 3, the problem is that Meraki still treats them as switchports. Since they stay in Layer 2, RSTP will naturally block one side of the triangle. On Catalyst, no switchp...
You need to enable ip routing on the L3 switch for the SVIs to actually route traffic between VLANs.Seehttps://www.ciscopress.com/articles/article.asp?p=3089357&seqNum=6 https://pingmynetwork.com/network/ccna-200-301/intervlan-routing
The routing logic is fine, but dropped packets usually come from inconsistent tagging or a mismatch on the uplink trunk between the switch and the gateway. Before touching SFPs, verify that both sides carry the exact same VLANs as tagged and that the...
Hi Michael,The issue isn’t really OSPF but the fact that the inter-DC links are still running at Layer 2. With RSTP enabled, one leg will always be blocked to prevent a loop, which is why the DC2–DC3 link stays unused. Disabling RSTP removes that lim...
