Date: Tue, 30 Jul 2024 15:44:21 +0100 From: Roy Marples <roy@marples.name> To: "Karl Denninger" <karl@denninger.net> Cc: "freebsd-net" <freebsd-net@freebsd.org> Subject: Re: DHCPv6 IA_PD - how-to Message-ID: <1910419702c.f8dcf010456961.6536659919669261420@marples.name> In-Reply-To: <fb6a9b28-7d52-42d8-a9e3-cd693b746bd2@denninger.net> References: <050440F8-B3D8-4B2C-85BD-D5C09C303037@distal.com> <20240727.122108.862717899466090274.moto@kawasaki3.org> <190fdf3e353.11351bb5e292296.3216692081725884177@marples.name> <20240730.091027.1008656135460861216.moto@kawasaki3.org> <fb6a9b28-7d52-42d8-a9e3-cd693b746bd2@denninger.net>
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---- On Tue, 30 Jul 2024 15:06:17 +0100 Karl Denninger wrote ---=20
> Ok so I have a "new problem" attempting to use dhcp6c for BOTH =
IPv4 and IPv6.
> This is the salient part of the configuration file (the rest is =
basically defaults):
> # Generate SLAAC address using the Hardware Address of the inte=
rface
> #slaac hwaddr
> # OR generate Stable Private IPv6 Addresses based from the DUID
> #slaac private
> =20
> allowinterfaces igb0
> =20
> #ipv6only
> #ipv4only
> =20
> #
> # Do not run these hooks; DO run the DDNS one in exit-hooks
> #
> nohook resolv.conf hostname ntp.conf
> =20
> interface igb0
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ia_na 1
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ia_pd 1/::/56 igb1/0/64=
igb1.4/1/64
> =20
> If I do "ipv6only" and run dhcpcd -T then I do get a prefix:
> root@IpGw:/usr/local/etc # dhcpcd -T
> dhcpcd-10.0.8 starting
> DUID 00:01:00:01:2e:3a:76:f1:00:0d:b9:46:71:88
> igb0: IAID b9:46:71:88
> igb0: IA type 3 IAID 00:00:00:01
> igb0: IA type 25 IAID 00:00:00:01
> igb0: soliciting a DHCPv6 lease
> igb1: activating for delegation
> igb1: IAID b9:46:71:89
> igb1.4: activating for delegation
> igb1.4: IAID ff:00:00:04
> igb0: soliciting an IPv6 router
> igb0: ADV 2600:6c5d:7009:600:c5e0:25ed:b364:36c2/128 from fe8=
0::201:5cff:fe70:7c46
> igb0: REPLY6 received from fe80::201:5cff:fe70:7c46
> interface=3Digb0
> pid=3D3395
> protocol=3Ddhcp6
> reason=3DTEST
> skip_hooks=3D'resolv.conf hostname ntp.conf'
> ifcarrier=3Dup
> ifflags=3D34883
> ifmetric=3D1001
> ifmtu=3D1500
> ifwireless=3D0
> new_dhcp6_client_id=3D000100012e3a76f1000db9467188
> new_dhcp6_domain_search=3Dsearch.charter.net
> new_dhcp6_ia_na1_ia_addr1=3D2600:6c5d:7009:600:c5e0:25ed:b364:36c2
> new_dhcp6_ia_na1_ia_addr1_pltime=3D3337
> new_dhcp6_ia_na1_ia_addr1_vltime=3D3337
> new_dhcp6_ia_na1_iaid=3D00000001
> new_dhcp6_ia_na1_t1=3D1537
> new_dhcp6_ia_na1_t2=3D2617
> new_dhcp6_ia_pd1_iaid=3D00000001
> new_dhcp6_ia_pd1_prefix1=3D2600:6c5d:5d00:9d00::
> new_dhcp6_ia_pd1_prefix1_length=3D56
> new_dhcp6_ia_pd1_prefix1_pltime=3D3337
> new_dhcp6_ia_pd1_prefix1_vltime=3D3337
> new_dhcp6_ia_pd1_t1=3D1537
> new_dhcp6_ia_pd1_t2=3D2617
> new_dhcp6_name_servers=3D'2607:f428:ffff:ffff::1 2607:f428:ff=
ff:ffff::2'
> new_dhcp6_server_id=3D000100012261b73d00144f9bcc84
> dhcpcd exited
> =20
> This looks ok.=C2=A0 That prefix is good and I presume if I let it s=
et the other interfaces it will be ok.
> =20
> But if I do not say "ipv6only", leaving it that commented out so =
I can get both, I get on dhcpcd -T:
> root@IpGw:/usr/local/etc # dhcpcd -T
> dhcpcd-10.0.8 starting
> DUID 00:01:00:01:2e:3a:76:f1:00:0d:b9:46:71:88
> igb0: IAID b9:46:71:88
> igb0: IA type 3 IAID 00:00:00:01
> igb0: IA type 25 IAID 00:00:00:01
> igb0: soliciting a DHCPv6 lease
> igb1: activating for delegation
> igb1: IAID b9:46:71:89
> igb1.4: activating for delegation
> igb1.4: IAID ff:00:00:04
> igb0: rebinding lease of 71.15.253.203
> igb0: leased 71.15.253.203 for 2813 seconds
> interface=3Digb0
> pid=3D3358
> protocol=3Ddhcp
> reason=3DTEST
> skip_hooks=3D'resolv.conf hostname ntp.conf'
> ifcarrier=3Dup
> ifflags=3D34883
> ifmetric=3D1001
> ifmtu=3D1500
> ifwireless=3D0
> old_broadcast_address=3D255.255.255.255
> old_dhcp_lease_time=3D3600
> old_dhcp_message_type=3D5
> old_dhcp_rebinding_time=3D3150
> old_dhcp_renewal_time=3D1800
> old_dhcp_server_identifier=3D96.33.192.1
> old_domain_name_servers=3D'71.10.216.1 71.10.216.2'
> old_interface_mtu=3D1500
> old_ip_address=3D71.15.253.203
> old_network_number=3D71.15.252.0
> old_routers=3D71.15.252.1
> old_subnet_cidr=3D22
> old_subnet_mask=3D255.255.252.0
> new_broadcast_address=3D255.255.255.255
> new_dhcp_lease_time=3D2813
> new_dhcp_message_type=3D5
> new_dhcp_rebinding_time=3D2363
> new_dhcp_renewal_time=3D1013
> new_dhcp_server_identifier=3D96.33.192.1
> new_domain_name_servers=3D'71.10.216.1 71.10.216.2'
> new_interface_mtu=3D1500
> new_ip_address=3D71.15.253.203
> new_network_number=3D71.15.252.0
> new_routers=3D71.15.252.1
> new_subnet_cidr=3D22
> new_subnet_mask=3D255.255.252.0
> dhcpcd exited
> =20
> =20
> And if I actually boot the machine that way (rather than run it in =
test) I get only IpV4; the v6 solicitation never happens. =20
Don't use -T in the real world. It will exit once one address family comple=
tes.
You probably want the --noconfigure option.
Roy
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