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Questions tagged [dhcpv6]

DHCPv6 is similar to classic DHCP as known and very common for IPv4. Since IPv6 features stateless auto configuration (SLAAC), DHCPv6 is less widespread than DHCP for IPv4.

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IPv4 To IPv6 Migration Advice

I'm currently working on adding IPv6 capabilities to our network, and I have some questions on what is considered best practice in 2020 to convert some of the IPv4 concepts we are used to into the IPv6 world. In the current setup that I have, we are…
Max Ehrlich
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Can clients learn their time zone on a network configured using RA?

I found that there are some clients which when they are on an IPv4 network learn their current time zone through DHCP option number 101. On an IPv6-only network where an IP prefix is advertised by radvd on Ubuntu Server 14.04 these clients do not…
kasperd
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Windows Server 2016 IPv6 Hell

We have a small network consisting of a Sonicwall, Windows Server 2016 DC, and Exchange Server 2016 (hosted on a second WS2016 machine) along with a number of Windows 10 clients. Due to compatibility with one of our vendors, we are being forced to…
DWCP
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Why is a /128 IPv6 address assigned via DHCPv6 in Ubuntu?

I am testing the implementation of IPv6 in Ubuntu. My Ubuntu linux client correctly gets RA from server and configures an address in the advertised prefix. Next it gets another address via DHCP which has a /128 mask. 2: eth0:…
Raj
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IPv6 on Amazon VPC: missing default route in Ubuntu

Now that Amazon has extended IPv6 support for VPC to most of their global regions including eu-west-1, I'm trying to get my instances connected. Unfortunately I can't get routing to work. I've followed the steps in the migration guide, i.e. I've…
Martijn Heemels
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How can IPv6 clients find servers such as NTP, SIP

For IPv6, I understand clients may get an address either statelessly using SLAAC, or statefully using DHCPv6 (although I hear Android doesn't support address assignment via DHCPv6). My question is, for clients that configure their IPv6 address via…
Craig McQueen
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How do I enable IPv6 on Fedora 28 on Amazon EC2

I can't seem to get IPv6 working in Fedora 28 in Amazon EC2 (so using cloud-init and DHCPv6). It works in RHEL 7 with the configuration described here. Applying the same configuration to Fedora 28 doesn't seem to do anything. In particular,…
Aram Hăvărneanu
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How to get /64 as prefix length when using DHCPv6 and radvd?

For our networking course we were asked to set up a DHCPv6 server in a virtual machine. I choose to work on a virtual machine(on VMware) running Ubuntu Desktop 16.04 and Lubuntu 14.04 as test client with network adapters set for a specific LAN. I…
Jugurtha
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IPv6 only server PXE provisioning

We are currently preparing for IPv6 only network deployment and struggle to find a unique server identification. In our previous setup, we used mac address as servers primary identification. We were then able to assign the server always the same…
Yarik Dot
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rfc 6939 support for dhcpv6 relay

isc-dhcp-server now supports rfc6939 as of version 4.3, and I would like to be able use it as it is quite nice to be able to just use the mac address to identify dhcpv6 clients. However, I can't seem to find a dhcpv6 relay that supports rfc 6939,…
Bryce Larson
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Debian 8 resolv.conf overwritten by IPv6 autoconfiguration/DHCP when DHCP disabled

I have recently installed Debian 8 on a network with IPv6 DHCP Enabled. /etc/resolv.conf is being overwritten by the IPv6 DHCP entires continually despite the fact that all IPv6 DHCP is disabled, autoconfiguration of IPv6 is disabled, and no…
Nicholas Andre
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Disable DHCPv6 client in Windows

I don't quite understand the link between 4 parameters related to IPv6 stateful and stateless autoconfiguration used under netsh int ipv6 set interface command context in Windows: advertise routerdescovery managedaddress otherstateful From what I…
Chris
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How to get a proper prefix length from DHCPv6 server?

I have two virtual machines with Ubuntu Server 20.04. One of these virtual machines is a DHCPv6 server, and the other one is a client. I am able to set an IPv6 address on the client, but I cannot ping to and from this address. ip -6 route shows this…
user6758
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Run script when ipv6 address changes

I am running a Linux server (openSUSE) behind a router and would like to run a script when the ipv6 address of the server changes (for example because the router gets a new prefix from my provider). The server is using the wicked network daemon. I…
uli
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Linux DHCPv6 server for PD on ppp interfaces

I need to configure prefix delegation on PPPoE. What is the best DHCPv6 server implementation for this? So far I checked the following: isc-dhcp-server - doesn't work with PPP interfaces dibbler - works, but needs all the interfaces to be present…
Karol Jędrzejczyk
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