-Yes, you can use up to two times the bandwidth limit you procured by using the bandwidth available on the secondary connection of your ExpressRoute circuit. The built-in redundancy of your circuit is configured using primary and secondary connections, each of the procured bandwidth, to two Microsoft Enterprise Edge routers (MSEEs). The bandwidth available through your secondary connection can be used for more traffic if necessary. Since the secondary connection is meant for redundancy, it isn't guaranteed and shouldn't be used for extra traffic for a sustained period of time. To learn more about how to use both connections to transmit traffic, see [use AS PATH prepending](expressroute-optimize-routing.md#solution-use-as-path-prepending).
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