Questions tagged [dhcpv6]

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

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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 ...
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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 ...
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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 ...
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Running ISC DHCP SERVER6 for IPV6 on ubuntu

I am using ISC DHCP SERVER6 for ipv6 on ubuntu machine. My requirement is 1. I am using two ubuntu machines. Dhcpv6 server is running on one machine and dhcpv6 client is running on another machine. 2....
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Can I use my Ubuntu system as IPv6 enabled router

I had to study the behavior of a Microcontroller when connected to DHCPv6 enabled router. But i don't have such a router, so I was wondering if my PC running Ubuntu 14.04 can be used to provide ...
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Ubuntu 18.04 server configured with static ipv6 request dhcp ipv6 address

I'm having trouble understanding why an Ubuntu 18.04 LTS server installed on a bhyve host insists on requesting a dhcpv6 address despite being configured with a static address with dhcp6 off. root@...
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1answer
337 views

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-...
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301 views

dhclient does not send DHCPv6 Solicit message on disconnect/connect, keeps old lease

Network background: Connecting to an IPv4/IPv6 native dual-stack network on a campus with multiple VLAN's and network segments. Using only stateful DHCPv6 with no SLAAC permitted. When disconnecting ...
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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 ...
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983 views

IPv6 in an Ubuntu 16.04 Behind a Router

I'm running Ubuntu 16.04 behind a router. I can get IPv6 on the router working, but it fails on the client. If anyone has any input on how I can resolve that, I'd appreciate it. I can use either ...
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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 ...
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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 ...
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185 views

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::...
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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 ...
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493 views

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?
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2k views

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 ...
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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 ...