Hi Yu,
This simple configuration:
{
"Dhcp6": {
"subnet6": [
{
"subnet": "fd74:5656:15e2:10::/64",
"id": 1,
"interface": "ens256",
"pools": [
{
"pool": "fd74:5656:15e2:10::200 - fd74:5656:15e2:10::9999"
}
]
}
]
}
}
runs just fine on my test server. No syntax error. Can you provide
the syntax error you received?
Thank you,
Darren Ankney
On Tue, Feb 13, 2024 at 2:40 PM Xiao, Yu (CCI-Atlanta) <[email protected]> wrote:
>
> So I re-read the 9.2.18 IPv6 Subnet Selection section again, it mentioned
> specifically how to configure for LAN lease, but it mentioned the interface
> parameter, however, during my test, this parameter is not working and I have
> to use the parameter “interface-id” in order to make the kea process running.
> I am wondering if there’s a documentation bug here and something else is
> preventing the LAN DHCP use.
>
>
>
> I am wondering if anyone from ISC can help explain this further, thank you!
>
>
>
> “
>
> the DHCPv6 server must be able to operate while only using link-local
> addresses. Therefore, an optional interface parameter is available within a
> subnet definition to designate that a given subnet is local, i.e. reachable
> directly over the specified interface. For example, a server that is intended
> to serve a local subnet over eth0 may be configured as follows:
>
> "Dhcp6": {
>
> "subnet6": [
>
> {
>
> "id": 1,
>
> "subnet": "2001:db8:beef::/48",
>
> "pools": [
>
> {
>
> "pool": "2001:db8:beef::/48"
>
> }
>
> ],
>
> "interface": "eth0"
>
> }
>
> ],
>
> ...
>
> }
>
>
>
> “
>
>
>
>
>
> Best Regards,
>
> Yu
>
>
>
>
>
> From: Kea-users <[email protected]> on behalf of Xiao, Yu
> (CCI-Atlanta) via Kea-users <[email protected]>
> Date: Tuesday, February 13, 2024 at 1:44 PM
> To: Darren Ankney <[email protected]>, Kea user's list
> <[email protected]>
> Cc: Xiao, Yu (CCI-Atlanta) <[email protected]>
> Subject: Re: [Kea-users] [EXTERNAL] Re: DHCPv6 not working o PVE LAN
>
> Hi Darren,
>
>
>
> Thank you for your kind advice! I have configured ens18 having the ipv6 as
> 2001:db8:1::1/64 and changed the configuration file as below to add the
> interface IP. But still having the same error.
>
>
>
> {
>
> # DHCPv6 configuration starts on the next line
>
> "Dhcp6": {
>
> # First we set up global values
>
> "valid-lifetime": 400,
>
> "renew-timer": 100,
>
> "rebind-timer": 200,
>
> "preferred-lifetime": 300,
>
> # Next we set up the interfaces to be used by the server.
>
> "interfaces-config": {
>
> "interfaces": [ "ens18/2001:db8:1::1" ]
>
> },
>
> # And we specify the type of lease database
>
> "lease-database": {
>
> "type": "memfile",
>
> "persist": true,
>
> "name": "/var/lib/kea/dhcp6.leases"
>
> },
>
> # Finally, we list the subnets from which we will be leasing addresses.
>
> "subnet6": [
>
> {
>
> "id": 1,
>
> "subnet": "2001:db8:1::/64",
>
> "pools": [
>
> {
>
> "pool": "2001:db8:1::1-2001:db8:1::ffff"
>
> }
>
> ],
>
> "interface-id": "ens18/2001:db8:1::1"
>
> }
>
> ]
>
> # DHCPv6 configuration ends with the next line
>
> }
>
> }
>
> Packet information:
>
>
>
> Frame 2: 174 bytes on wire (1392 bits), 174 bytes captured (1392 bits)
> Ethernet II, Src: 42:f1:11:7a:0d:e7 (42:f1:11:7a:0d:e7), Dst:
> c6:0b:eb:d1:72:98 (c6:0b:eb:d1:72:98)
> Internet Protocol Version 6, Src: fe80::40f1:11ff:fe7a:de7, Dst:
> fe80::c40b:ebff:fed1:7298
> User Datagram Protocol, Src Port: 547, Dst Port: 546
> DHCPv6
> Message type: Advertise (2)
> Transaction ID: 0x912c7c
> Client Identifier
> Option: Client Identifier (1)
> Length: 18
> DUID: 0004a33501e38515e1763e47e3b0c5f85510
> DUID Type: Universally Unique IDentifier (UUID) (4)
> UUID: a33501e38515e1763e47e3b0c5f85510
> Server Identifier
> Option: Server Identifier (2)
> Length: 14
> DUID: 000100012d55697d42f1117a0de7
> DUID Type: link-layer address plus time (1)
> Hardware type: Ethernet (1)
> DUID Time: Feb 6, 2024 17:04:45.000000000 EST
> Link-layer address: 42:f1:11:7a:0d:e7
> Link-layer address (Ethernet): 42:f1:11:7a:0d:e7 (42:f1:11:7a:0d:e7)
> Identity Association for Non-temporary Address
> Option: Identity Association for Non-temporary Address (3)
> Length: 64
> IAID: ca53095a
> T1: 0
> T2: 0
> Status code
> Option: Status code (13)
> Length: 48
> Status Code: NoAddrAvail (2)
> Status Message: Server could not select subnet for this client
>
>
>
>
>
> Best Regards,
>
> Yu
>
>
>
>
>
> From: Darren Ankney <[email protected]>
> Date: Tuesday, February 13, 2024 at 5:30 AM
> To: Kea user's list <[email protected]>
> Cc: Xiao, Yu (CCI-Atlanta) <[email protected]>
> Subject: [EXTERNAL] Re: [Kea-users] DHCPv6 not working o PVE LAN
>
> Hi Yu,
>
> Without looking too closely, I'd imagine that this subnet:
> 2001:db8:1::/64 does not exist in your network? Therefore there is no
> way for Kea to select this subnet? It doesn't look like your traffic
> was relayed, so your Kea server would need to find that subnet
> configured on a local interface on which it was listening. Try adding
> this subnet to the ens18 interface (this is just a guess, btw).
>
> Thank you,
> Darren Ankney
>
> On Mon, Feb 12, 2024 at 5:08 PM Xiao, Yu (CCI-Atlanta) via Kea-users
> <[email protected]> wrote:
> >
> > Greetings,
> >
> >
> >
> > I am working on a home lab as concept design for DHCP ipv6. I have two
> > Rocky 8 VMs under PVE, one is server which installed kea-dhcp6 and the
> > other is the client. I used the dummy configuration in the Kea manual with
> > a few changes on T1 and T2 but the same IP information. But I don’t see the
> > client got any IPv6 from the server. I did the packets capture using
> > tcpdump. I can see the solicit and advertise packets, but in the advertise
> > packet, I see status message: Server could not select subnet for this
> > client.
> >
> >
> >
> > I did Google and found previous discussions email from this mailer, so I
> > added the interface-id configuration under “subnet6” section. But still, I
> > see the same error message. I have opened the port for DHCPv6 on server
> > side, also there’s IPv4 connectivity between the server and the client with
> > static Ips.
> >
> >
> >
> > Can anyone provide some insights? Thank you all!
> >
> >
> >
> >
> >
> >
> >
> > Configuration:
> >
> > {
> >
> > # DHCPv6 configuration starts on the next line
> >
> > "Dhcp6": {
> >
> >
> >
> > # First we set up global values
> >
> > "valid-lifetime": 400,
> >
> > "renew-timer": 100,
> >
> > "rebind-timer": 200,
> >
> > "preferred-lifetime": 300,
> >
> >
> >
> > # Next we set up the interfaces to be used by the server.
> >
> > "interfaces-config": {
> >
> > "interfaces": [ "ens18" ]
> >
> > },
> >
> >
> >
> > # And we specify the type of lease database
> >
> > "lease-database": {
> >
> > "type": "memfile",
> >
> > "persist": true,
> >
> > "name": "/var/lib/kea/dhcp6.leases"
> >
> > },
> >
> >
> >
> > # Finally, we list the subnets from which we will be leasing addresses.
> >
> > "subnet6": [
> >
> > {
> >
> > "id": 1,
> >
> > "subnet": "2001:db8:1::/64",
> >
> > "pools": [
> >
> > {
> >
> > "pool": "2001:db8:1::1-2001:db8:1::ffff"
> >
> > }
> >
> > ],
> >
> > "interface-id": "ens18"
> >
> > }
> >
> > ]
> >
> > # DHCPv6 configuration ends with the next line
> >
> > }
> >
> >
> >
> > }
> >
> >
> >
> > Packets capture info:
> >
> > Frame 2: 174 bytes on wire (1392 bits), 174 bytes captured (1392 bits)
> >
> > Ethernet II, Src: 42:f1:11:7a:0d:e7 (42:f1:11:7a:0d:e7), Dst:
> > c6:0b:eb:d1:72:98 (c6:0b:eb:d1:72:98)
> >
> > Internet Protocol Version 6, Src: fe80::40f1:11ff:fe7a:de7, Dst:
> > fe80::c40b:ebff:fed1:7298
> >
> > User Datagram Protocol, Src Port: 547, Dst Port: 546
> >
> > DHCPv6
> >
> > Message type: Advertise (2)
> >
> > Transaction ID: 0x2f54ab
> >
> > Client Identifier
> >
> > Server Identifier
> >
> > Identity Association for Non-temporary Address
> >
> > Option: Identity Association for Non-temporary Address (3)
> >
> > Length: 64
> >
> > IAID: ca53095a
> >
> > T1: 0
> >
> > T2: 0
> >
> > Status code
> >
> > Option: Status code (13)
> >
> > Length: 48
> >
> > Status Code: NoAddrAvail (2)
> >
> > Status Message: Server could not select subnet for this client
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Best Regards,
> >
> > Yu
> >
> >
> >
> > --
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> >
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