If the Ethernet service instance uses double-VID forwarding mode, the VXLAN tunnel must use double-VID learning mode. If the VXLAN tunnel uses SVID-only forwarding mode, the Ethernet service instance must use SVID-only learning mode. If the Ethernet service instance uses SVID-only forwarding mode, the VXLAN tunnel must use SVID-only learning mode. If the VXLAN tunnel uses MAC forwarding mode, the Ethernet service instance must use source MAC learning mode. If the Ethernet service instance uses MAC forwarding mode, the VXLAN tunnel must use source MAC learning mode. For example, if a VSI has an Ethernet service instance and a VXLAN tunnel, the following requirements must be met: In any of the learning modes, the outgoing interface in a MAC address entry is the Ethernet service instance or VXLAN tunnel interface where the entry is learned.įor correct forwarding, the VXLAN tunnels and Ethernet service instances of a VSI must use matching MAC learning modes and VXLAN Layer 2 forwarding modes. The MAC address in a MAC address entry uses the 0-SVLAN tag -CVLAN tag format. The MAC address in a MAC address entry uses the 0-SVLAN tag -0 format.ĭ ouble-VID learning mode-The device generates MAC address entries based on the inner and outer VLAN IDs (CVLAN and SVLAN tags) of data frames. SVID-only learning mode-The device generates MAC address entries based on the outer VLAN IDs (SVLAN tags) of data frames. S ource MAC learning mode-The device generates MAC address entries based on the source MAC addresses of data frames. The device supports the following MAC learning modes for Ethernet service instances and VXLAN tunnels: The entries can be manually created or dynamically learned. If double-VID or SVID-only forwarding mode is used, make sure the VSI's MAC address table contains VLAN-based MAC address entries. The VTEP can perform MAC address table lookup based on the outer VLAN ID or both the inner and outer VLAN IDs. In double-VID or SVID-only forwarding mode, a VTEP forwards the traffic received from an Ethernet service instance or VXLAN tunnel based on the VLAN information. For correct forwarding, make sure the traffic of a VLAN is forwarded along the same path. If the network contains a large number of user terminals, use double-VID or SVID-only forwarding mode to reduce the MAC address table size and avoid forwarding failure caused by MAC address conflicts. About the VXLAN Layer 2 forwarding mode and the MAC learning modeīy default, a VTEP uses MAC forwarding mode, which means forwarding Layer 2 traffic based on the destination MAC address.
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