Hi,
a trunk link in Cisco is a tagged port = a port which transports multiple VLANs.
If you want to increase speed you must do an etherchannel which is a logical bundling of physical ports.
But if your trafic flow is mainly between 1 src and 1 dst then you will not do load-balancing because the traffic in the bundle will always use the same physical port due to the load-balancing algorithm.
Regards.
Alain.
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