Hey Paul
The command configure sharing address-based custom should be in 15.3 as it has been in XOS since 12.3. The crc-32 however is not there we only supported crc-16
"This command specifies the part of the packet header that the switch examines to select the egress"
"port for address-based load-sharing trunks. The address-based load-sharing setting is global and applies to all load-sharing trunks, or LAGs, that are address-based and configured with a custom algorithm. You change this setting by issuing the command again with a different option."
"The addressing information examined is based on the packet protocol as follows:"
"• IPv4 packets—Uses the source and destination IPv4 addresses and Layer4 port numbers as specified with this command."
"• IPv6 packets—Uses the source and destination IPv6 addresses and Layer4 port numbers."
"• MPLS packets—Uses the top, second, and reserved labels and the source and destination IP"
"addresses."
"• Non-IP Layer 2—Uses the VLAN ID, the source and destination MAC addresses, and the ethertype."
"The xor hash algorithm guarantees that the same egress port is selected for traffic distribution based"
"on a pair of IP addresses, Layer4 ports, or both, regardless of which is the source and which is the"
"destination."
Hope this helps
P