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Today's Topics:
1. DHCPv6 Option 56 configuration (Marek Hajduczenia)
2. Re: DHCPv6 Option 56 configuration (Miloslav H?la)
3. Re: DHCPv6 Option 56 configuration (Marek Hajduczenia)
----------------------------------------------------------------------
Message: 1
Date: Thu, 18 Jan 2024 11:54:55 -0700
From: Marek Hajduczenia <[email protected]>
To: [email protected]
Subject: DHCPv6 Option 56 configuration
Message-ID:
<CAEoryJcT=3fmk612od3peueijjkmzzfngkqvrhe8ir1c7km...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Dear mailing list users,
I have been trying to define NTPv6 option to use with ISC-DHCPD6 daemon
(4.4.1 running on Ubuntu 22.04 server) as follows
# ntp option 56
option space ntp code width 2 length width 2 hash size 2;
option ntp.address code 1 = array of ip6-address;
option opt56 code 56 = encapsulate ntp;
and then use it in a subnet as follows
shared-network enp7s0 {
authoritative;
# deny bootp;
subnet6 fc00:6ce4:40:146::/64 {
pool6 {
# vendor-option-space ntp;
option ntp.address fc00:6ce4:40:146::1;
default-lease-time 600;
min-lease-time 450;
max-lease-time 900;
allow all clients;
range6 fc00:6ce4:40:146::10 fc00:6ce4:40:146::ffff;
}
}
}
but no matter what I do, the ISC does not seem to include Option 56 in the
Reply / Advertise messages, even though the client does request Option 56.
I have spent probably 48 hrs in total already, resulting in discovering
that the only thing that seems to be working is a brute force hex encoded
string (example below)
option dhcp6.ntp-servers code 56 = string;
option dhcp6.ntp-servers
00:01:00:10:20:01:0d:b8:0c:a2:00:02:00:00:00:00:00:00:00:01;
Is there any trick to forcing the ISC daemon to include the encapsulation
option?
Thank you in advance
M
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Message: 2
Date: Thu, 18 Jan 2024 23:14:10 +0100
From: Miloslav H?la <[email protected]>
To: [email protected]
Subject: Re: DHCPv6 Option 56 configuration
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8; format=flowed
Dne 18.01.2024 v 19:54 Marek Hajduczenia napsal(a):
> Dear mailing list users,
> I have been trying to define NTPv6 option to use with ISC-DHCPD6 daemon
> (4.4.1 running on Ubuntu 22.04 server) as follows
Hi,
I think there is an integrated option:
option dhcp6.sntp-servers fc00:6ce4:40:146::1;
Milo
------------------------------
Message: 3
Date: Thu, 18 Jan 2024 22:20:14 +0000
From: Marek Hajduczenia <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: DHCPv6 Option 56 configuration
Message-ID:
<dm6pr20mb2332723739d7421529df45a4f8...@dm6pr20mb2332.namprd20.prod.outlook.com>
Content-Type: text/plain; charset="utf-8"
Thank you, Milo, but the DHCPv6 clients explicitly request option 56 and
happily ignore the vale passed in the sntp option. I dug through all documents
I can find online, including this mailing list, and found nothing showing how
this Option could be implemented. Why is it defined at all if it is not being
used?
M
From: dhcp-users <[email protected]> on behalf of Miloslav H?la
<[email protected]>
Date: Thursday, January 18, 2024 at 3:14?PM
To: [email protected] <[email protected]>
Subject: Re: DHCPv6 Option 56 configuration
Dne 18.01.2024 v 19:54 Marek Hajduczenia napsal(a):
> Dear mailing list users,
> I have been trying to define NTPv6 option to use with ISC-DHCPD6 daemon
> (4.4.1 running on Ubuntu 22.04 server) as follows
Hi,
I think there is an integrated option:
option dhcp6.sntp-servers fc00:6ce4:40:146::1;
Milo
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