Notes of EOS VXLAN Chapter

EOS VXLAN Chapter

• Architecture, couple of new concepts with similar one in VLAN world
• VXLAN = VLAN
• VTEP = Switch
• VTI = Port
• VNI = VLAN
• 1 VNI can attach different VLANs on different VTEP
• HER (head-end replication) handles BUM traffic by using flood list
• VXLAN vs MLAG
• From downstream L2 devices perspective, MLAG peers appear as ONE single virtual switch, which is by MLAG protocol AUTOMATICALLY, like STP, system MAC, etc. 
• But from upstream L3 devices, you have to configure MANUALLY to ensure one router, so the following info MUST BE SAME:
• VLAN-VNI mapping
• VTEP IP of loopback address
• Flood VTEP list
• And be careful:
• OSPF ID must be manually configured to avoid duplicated to confuse the routing
• On DCS-7050X platform (Trident II ASIC), need a recir interface to process the packets twice in case of VXLAN routing.