The VXLAN Gateway implementation is available in two modes: Base Interworking Mode and Full Interworking Mode. By default, the Base Interworking Mode is enabled and Full Interworking Mode is disabled. You change modes through a boot configuration flag.
Important
Changing the mode requires a reboot for the change to take effect, which can cause a loss of traffic.
Base Interworking Mode is the default mode. In this mode, VXLAN Gateway supports Layer 2 gateway communication at line rate between VXLAN and traditional VLAN environments.
Base Interworking Mode has the following limitations:
No support for VXLAN-to-VXLAN communication.
No support for VXLAN-to-SPB communication.
No support for SMLT, vIST, or Simplified vIST.
No support for OVSDB protocol support for VXLAN Gateway.
Each VNID represents a service instance for the VXLAN Gateway. To enable a VNID to extend into the SPB network, you must use Full Interworking Mode.
Note
If your configuration does not have a VXLAN Gateway but has SMLT or vIST, you can enable VXLAN Gateway in the Full Interworking Mode only. SMLT and vIST are incompatible and mutually exclusive with the Base Interworking Mode.
Full Interworking Mode is not the default mode. To configure Full Interworking Mode, you must enable the vxlan-gw-full-interworking-mode boot flag, save the configuration, and then reboot the switch.
Full Interworking Mode supports the Base Interworking Mode communication between VXLAN and traditional VLAN environments as well as VXLAN-to-VXLAN communication and all SPB functionality including vIST and SMLT. Layer 2 and Layer 3 services extend across VXLAN, VLAN, and SPB domains using an internal loopback. In Full Interworking Mode, VXLAN traffic flows at less than full line rate and the total amount of available internal loopback bandwidth depends on the platform used.
Full Interworking Mode has the following limitations:
No support for Simplified vIST.
A VNID cannot have the same value as an I-SID. A consistency check ensures that this does not happen if you change the boot configuration flag to turn off Full Interworking Mode and go into Base Interworking Mode.