I don't know about brocade, but here's what I see in Junos and IOS... ....dhcpv6 relay binding seen... {master:0} agould@eng-lab-5048-2> show dhcpv6 relay binding routing-instance three Prefix Session Id Expires State Interface Client DUID 2699:2699:0:7::100/128 199 2591002 BOUND irb.26 LL_TIME0x1-0x1861ed8c-e8:03:9a:eb:0d:21 ....that same binding above is seen as a /128 route of type access-internal... {master:0} agould@eng-lab-5048-2> show route table three.inet6.0 2699:2699:0:7::100/128 three.inet6.0: 16 destinations, 38 routes (16 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both 2699:2699:0:7::100/128 *[Access-internal/12] 1w5d 03:19:06 > to fe80::fd61:6bfe:da75:4801 via irb.26 --------------------------------------------------------------------------- ....dhcpv6 relay binding seen... eng-lab-3600-1#sh ipv6 dhcp relay binding vrf three Prefix: 2699:2699:FE00:30::/64 (Vlan26) DUID: 00030001B0B2DCCB1D1E IAID: Unknown lifetime: 2592000 expiration: 06:21:48 CDT Oct 25 2017 ....that same binding above is seen as a /64 route of type static... eng-lab-3600-1#sh ipv6 route vrf three 2699:2699:FE00:30::/64 Routing entry for 2699:2699:FE00:30::/64 Known via "static", distance 1, metric 0 Route count is 1/1, share count 0 Routing paths: FE80::B2B2:DCFF:FECB:1D1E, Vlan26 Last updated 3w4d ago eng-lab-3600-1#sh ipv6 route vrf three static IPv6 Routing Table - three - 18 entries Codes: C - Connected, L - Local, S - Static, U - Per-user Static route B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2 IA - ISIS interarea, IS - ISIS summary, ND - ND Default, NDp - ND Prefix DCE - Destination, NDr - Redirect, O - OSPF Intra, OI - OSPF Inter OE1 - OSPF ext 1, OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1 ON2 - OSPF NSSA ext 2 .... S 2699:2699:FE00:30::/64 [1/0] via FE80::B2B2:DCFF:FECB:1D1E, Vlan26 ...and as you can see, I have no static routes configured ... so it's interesting that these routes are seen as static.... eng-lab-3600-1#sh run | in ip route eng-lab-3600-1# -Aaron Gould