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Questions tagged [dhcpv6]

DHCPv6 is a protocol for advanced host auto configuration features on IPv6

DHCPv6 is a protocol used for auto configuration of hosts when more features than those offered by SLAAC are needed. DHCPv6 is used in combination with router advertisements such as those produced by . For simple network setups DHCPv6 is not needed and using alone will be sufficient.

20 questions
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Obtaining an IPv6 prefix via Prefix Delegation in Xenial

I want to configure an Ubuntu (Xenial) box as an IPv4 and IPv6 router. (I have IPv4 working already.) I intend to use dnsmasq to distribute globally routable IPv6 addresses via RA. However, to do that, I first need to get the Ubuntu box acting as…
hsivonen
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DUID for wired and wireless adapters are the same. Ubuntu 16.04.2

So, I have already looked at this post and it has only partially answered my question, but added just as much confusion. I looked at both of the dhclient6-* files, one for the wired adapter, and the other for the wireless. They appear to be the…
user436183
3
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1 answer

How to retrieve the duid used in the dhcpv6 client

I m using odhcp6c as DHCPv6 client I want to know the DUID used by the my interface in the DHCPv6. How to retrieve the DUID?
Mohamed KALLEL
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Get IPv6 on PPPoE in Ubuntu

I have a strange situation here. If anyone can help, please do so. We're talking about a Linux Box running as Router using Ubuntu 18.04.3 LTS, with 2 interfaces: "lan" - which connects to my internal LAN and "wan" - which connects to my…
Adam
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How do I get Ubuntu 16.04 to generate a type 3 DUID instead of a Type 1 DUID?

I'm trying to get IPv6 set up on a client (no GUI) using DHCPv6. It appears that Ubuntu by default configures dhclient to generate a Type 1 DUID (LLT) - an ID based on the mac address and the time of boot. Instead I'd like it to generate a Type 3…
Megan Walker
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Get dynamic and static IPv6 address

I'm trying to make my Ubuntu 16.04.1 home server have (at least) two IPv6 addresses for its bonding interface of two physical network interfaces: A static local one from the fd:: range (for a Samba4 primary domain controller). A dynamic global one,…
Gunnar Arndt
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Ubuntu server 20.04 IPv6 DUID

on an Ubuntu server acting as an DHCPv6 client with netplan set like this renderer: networkd dhcp6: true I received an IPv6 address but I need the DUID to create a static lease on a router. I did a lot of research on the internet but I found no…
clorant
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Cannot disable IPv6 Autoconf and Privacy Extensions, but sysctl values are set to disable it

Why I cannot disable IPv6 autoconfiguration even if the sysctl values are set to this? net.ipv6.conf.default.autoconf = 0 net.ipv6.conf.default.accept_ra = 0 net.ipv6.conf.all.accept_ra = 0 net.ipv6.conf.all.autoconf =…
Seolh
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DHCPv6 timeout preferred valid

Can someone tell me what this means, and how to fix it? Ubuntu 18.04. Dec 4 14:37:16 myserver systemd-networkd[28369]: enp2s0: DHCPv6 address xxxx:xxxx:xxxx:xxxx::49/128 timeout preferred 3600 valid 3600 Lots of these in the log.
alabamatoy
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How to connect to ipv6?

My server is connected to a network which supports ipv6, however, it can't connect to any ipv6 address. Ping6 returns a message "network is unreachable." and curl ipv6 don't work as well. How to check whether my network really supports ipv6 and if…
Poster Rubin
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wide-dhcpv6 is failing to start because its using an interface that does not exist

I and trying to restart wide-dhcpv6 and I get this in the journalctl Feb 03 12:09:49 router sudo[1285]: ciaran : TTY=pts/0 ; PWD=/home/ciaran ; USER=root ; COMMAND=/bin/systemctl restart wide-dhcpv6-client Feb 03 12:09:49 router sudo[1285]:…
cTurtle98
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How are IAID's calculated?

I am troubleshooting DHCPv4 queries and trying to understand how the IAID values are calculated. According to the code in dhclient (dhc6.c - line 1715 to 2971) the IAID should be the last 4 (least significant) digits of the network card's MAC…
Ben
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Lost ipv6 address after trying to setup ipv6 forwarding

I have built a router based on Ubuntu server 16.04 LTS, which also acts as my home server. Right after fresh installation when I use ip addr, it successfully gave me the global ipv6 (not the local link that looks like fe80::) that Comcast assigns…
Yinzhou Zhu
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1 answer

DHCPv6 assigned 64 prefix instead of 112 prefix

I'm trying to setup my DHCPv6 on ubuntu to assign an address with a 112 prefix. My configuration looks like this: subnet6 2001:db8:a0b::640a:0/112 { range6 2001:db8:a0b::6464:640a 2001:db8:a0b::6464:640d; default-lease-time 600; …
ocp1000
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Not able to run isc-dhcp-server6, getting error "PID Permission denied." for IPv6 server

Not able to run isc-dhcp-server6, getting error "Can't create PID file /run/dhcp-server6/dhcpd6.pid: Permission denied." I have added a isc-dhcp-server and configured IPv4 and IPv6 conf files. Once service started, I am getting the service status as…
Quality_Engineer
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