Hi all, Is there a way to insert custom metadata in a packet (other than the match tuple) that can then be extracted in a switch? Specifically, I am looking for something like Click's Paint element that allows marking packets with a 'color'. Later, another network element can look at the color and use it to decide forwarding behavior.
Initially, I was thinking of using VLAN tags for this. But then, those tags can collide with tags used in the underlying network and can create confusion. http://www.read.cs.ucla.edu/click/elements/paint Thanks
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