The hash algorithm for EX platforms(except ex9200 and ex4600)is fixed and the user cannot configure it.
The values used are:
IPv4 - src/dst IP, src/dst port
IPv6 - src/dst IPv6, src/dst port, IPv6 flow label
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If this worked for you please flag my post as an "Accepted Solution" so others can benefit. A kudo would be cool if you think I earned it.