First you should check, whether and which IPv6 addresses are already configured (perhaps auto-magically during auto-configuration).
Usage:
# /sbin/ip -6 route show [dev <device>]
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Example:
# /sbin/ip -6 route show dev eth0
3ffe:ffff:0:f101::/64 proto kernel metric 256 mtu 1500 advmss 1440
fe80::/10 proto kernel metric 256 mtu 1500 advmss 1440
ff00::/8 proto kernel metric 256 mtu 1500 advmss 1440
default proto kernel metric 256 mtu 1500 advmss 1440
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Usage:
Example (output is filtered for interface eth0). Here you see different IPv6 routes for different addresses on a single interface.
# /sbin/route -A inet6 |grep -w "eth0"
3ffe:ffff:0:f101 ::/64 :: UA 256 0 0 eth0 <- Interface route for global
¬ address
fe80::/10 :: UA 256 0 0 eth0 <- Interface route for link-local
¬ address
ff00::/8 :: UA 256 0 0 eth0 <- Interface route for all multicast
¬ addresses
::/0 :: UDA 256 0 0 eth0 <- Automatic default route
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