[Kea-users] Believe my config isn't working well with customer devices

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[Kea-users] Believe my config isn't working well with customer devices

Chris Gross

I have a question about some configuration to see if I’m making my config too simple and thus broken, or if I may have something misconfigured on my network.

Currently I build out a block for a /48 of WAN blocks, and anything in that /48 is allowed to assign a /56 from the /37. Then on my Cisco device, I have a general-prefix named DHCP set for the /48, and assign a /64 from that to each vlan I need a DHCPv6 space.


            "subnet": "2001:db8:2001::/48",

            "pools": [ { "pool": "2001:db8:2001::/48" } ],

            "pd-pools": [


                    "prefix": "2001:db8:2800::",

                    "prefix-len": 37,

                    "delegated-len": 56





ipv6 general-prefix DHCP 2001:db8:2001::/48


interface VlanXXYY

vrf forwarding CGNAT

ip address 100.XX.XX.1

ip helper-address global

ip helper-address global

ip flow ingress

load-interval 30

ipv6 address FE80::1 link-local

ipv6 address DHCP ::5:0:0:0:X/64

ipv6 enable

ipv6 nd managed-config-flag

ipv6 nd other-config-flag

ipv6 nd router-preference High

ipv6 dhcp relay destination 2001:db8::1

ipv6 dhcp relay destination 2001:db8::2

ipv6 verify unicast source reachable-via any



I see plenty of routes taken in my table, but very few IPv6 neighbors and seeing very little IPv6 traffic traversing, especially in comparison to Netflix and other for sure IPv6 sources.

Do I need to expand the /48 “subnet” into a list of /64 pools to assign from to work more efficiently? Missing a flag of some sort in my configuration to indicate to customer routers a smoother experience?


Chris Gross

Network Architect

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