Hi Burke, You can use link-aggregation 802.3AD with the sg-300. Try to make the trunk in the sg-300 with LACP enabled (before you make the trunk, otherwise LACP is disabled and you will only be able to do so by deleting the trunk and add it again). Flow control is enabled in the sg-300 (altough i'm not sure if this is needed). I've got the sg-300 and the QNAP TS 439 pro II+.
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