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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Netplan- How to configure a static IPv6-address and SLACC
I’m facing a situation where I need to configure an interface with both a private static IPv6 address and SLAAC (Stateless Address Autoconfiguration) addresses. The reason behind this requirement is ...
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Setup IPv6 network - no connectivity
I have a SonicWall TZ-300 firewall and I'm trying to setup a simple IPv6 network. Unfortunately, the Windows computer is not getting internet access (browse or tracert -6 to google IPv6). See below my ...
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Configure DHCPv6 on a Layer 3 Switch
I am training under Packet Tracer and I would like to be able to assign IPv6 addresses to my VLANs using a Layer 3 Switch as a DHCPv6 server (Between Layer 3 Switch and PCs there is a normal Switch). ...
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Windows DHCP IOT retain same IP
I am trying to address a problem.
We have a windows DHCP server and some devices, which we need to replace on needs. The device has a custom DHCP client which sends DHCP-DISCOVERY Packet with ...
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DHCPv6 Prefix Delegation IPv6 address assignment mechanism
When we run a DHCPv6 server with prefix delegation only (no range delegation at all).
Like this:
subnet6 2a02:5250:aaae:1005::0/64 {
prefix6 2a02:5250:aaaf:1001:: 2a02:5250:aaaf:f500:: /64;
}
...
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4
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Setting up multiple IPv6 routes over a single interface on Linux
tldr; A LAN device is able to get 2 separate internet connection (1 NATted from ISP Router, 1 from manual PPP connection). Able to separate ISP-WAN and PPP-WAN IPv4 into 2 routes using ip rules but ...
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Routed IPv6 on internal bridge with virtualized OPNsense router
I'm struggling with adding IPv6 to the internal bridge of my setup, here is what I have:
┌────────────────────────────────────────────────────────────────────────────────────────────────────...
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How does Windows DHCPv6 server prevent conflicts with other DHCPv6 servers?
With Windows DHCP server I can have two servers serving a network's scope so that if one fails the other picks up the slack. With DHCPv4 there are two options for doing this, the first is to set up a ...
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systemd-networkd not launching DHCPv6 client
The systemd-networkd documentation makes this statement...
By enabling DHCPv6 support explicitly, the DHCPv6 client will
be started regardless of the presence of routers on the link
This is the ...
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Simple stateful DHCPv6 using ISC DHCP and RADVD. Doesnt work?
I'm trying to set a simple ipv6 network using ISC DHCPv6 on a linux machine.
Here is my dhcpd6.conf:
subnet6 beef:fade::/112 {
max-lease-time 3600;
range6 beef:fade::100 beef:fade::fffe;
}
The ...
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How to configure DHCPv6 in Proxmox without bridge?
(crosspost: Network stack exchange)
I have a setup with Proxmox connected via WiFi. Everything works for my needs and IPv4 connectivity too.
Now, I want to see if it is possible to do some DHCPv6 ...
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ISC Dhcpv6 pool
I recently set up a dhcpv6 server in my network. The problem is: I set the range of it to
#VLAN120
subnet6 2001:470:2249:120::/64 {
range6 2001:470:2249:120::20 2001:470:2249:120::250;
...
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How to properly implement DHCPv6-PD to downstream router with Linux?
I am trying to configure a DIY Linux based IPv6 router / firewall to do the following:
Obtain a /56 prefix from the ISP on interface "wan0"
Provide /64 addresses to hosts on "lan1"...
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Does isc-dhcp-server-ldap work with DHCPv6?
I'm trying to add IPv6 to my network, which uses DHCPv4 with its data stored in an LDAP server. I'm using the Ubuntu module isc-dhcp-server-ldap v4.4.1 to configure the DHCPv4 server and I'm very ...
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What is default IPv6 configuration on routers
I've just started learning IPv6. I have a router running OpenWrt and I would like to configure it to use IPv6. As I know this address can be assigning to a client with or without DHCPv6 server. Do you ...
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How can DHCPv6 server allocate fixed IPv6 addresses to clients if it's not allowed to interpret DUID?
According to RFC3315:
Each DHCP client and server has a DUID. DHCP servers use DUIDs to
identify clients for the selection of configuration parameters and in
the association of IAs with clients. DHCP ...
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1
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OpenWrt allow IPv6 rule to access a server with global IPv6 on local area
First of all, I have a domain with dns configured to point to my device global address witch is set to static with my ISP gloabl prefix as xxxx:xxxx:xxxx:de01::3/64 in dhcpcd.conf.
I'm using Openwrt ...
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How to include vendor-specific option 17 suboptions 11, 12 and 13 in DHCPv6 solicit/request using dhclient
My request is to include option 17 sub-options 11, 12 and 13 in DHCPv6 solicit/request and I configured the same in dhclient6.conf on my Ubuntu as below.
send dhcp6.vendor-opts 00:00:0d:e9:00:0b:00:06:...
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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 ...
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Are DHCPv6 Information-request messages via unicast permitted?
RFC8415 section 16:
A server MUST discard any Solicit, Confirm, Rebind, or
Information-request messages it receives with a Layer 3 unicast
destination address.
RFC8415 section 18.4:
For example, ...
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Modify RDNSS in Router Advertisements on Linux/pfsense/OpenWrt
I have a linux box that acts as a bridge behind my ISP's modem-router. The reason I need bridge mode is because the ISP router doesn't support IPv6 prefix delegation. If I use my additional linux box ...
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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 ...
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DHCPv6 (RFC 8415) - What are reasonable initial values for time intervals T1/T2?
As described in Section 18.2. - Client Behavior of DHCP - RFC 8415 a client uses the Solicit message to discover DHCP servers configured to assign leases or return other configuration parameters on ...
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Is it possible to combine SLAAC for address assignment with DHCPv6 for dynamic DNS?
Is it possible to use DHCPv6 for dynamic DNS registration in a network where SLAAC is used for address assignment (i.e. both the "Managed Address Configuration" and the "Other ...
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1
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651
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Configuring isc-dhcpd server for DHCPv6 with multiple NTP addresses
I'm trying to configure a DHCPv6 server to provide more than one NTP address (option 56) using the isc-dhcpd server. Is there a currently supported way of doing this?
My first attempt was defining a ...
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How to serve custom DNS server to DHCPv6 clients in OpenWRT?
How to serve custom dns to dhcp clients in openWrt? explains how to serve custom DNS server for DHCP clients on IPv4.
But how to do it for IPv6? I tried adding DNS server's IPv6 address but it doesn'...
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How to disable IPv6 dhcpstaticipcoexistence on Server 2019
I have a Server 2019 host that has a static IPv6 address. It seems Microsoft added a feature in Windows 10 that is also present in 2019 where a host can have both a static IP address, as well as a ...
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Cannot add DHCPv6 reservation on Server 2012 R2 (error 20022)
I am trying to add DHCPv6 reservations on a Windows Server 2012 R2, but I do not want to use the "random" IPv6 the server chose (convert lease to reservation), but I want to use another, specific IPv6....
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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).
...
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IPv6 with DHCP6: where does the default route come from?
My ISP provides native IPv6 with DHCP6-PD; my router is a Netgear router running OpenWrt. Everything works fine, but I want to understand how exactly, because there are no RAs whatsoever from the ISP'...
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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, ...
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Is there a DHCPv6 equivalent of DHCPv4's private-use options?
DHCPv4 allows for custom information to be provided to network devices, using "private-use" options. The IANA registry of DHCP parameters reserves option numbers 224 to 254 for private use.
...
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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 ...
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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 ...
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Debian: Get single IPv6 over DHCP with Prefix Delegation
I've a Debian 9 server with multiple network interfaces acting as web server connected to an ISP-provided optical network terminal (ONT) @ 1Gbps. The ISP provides us with multiple dynamic IPv4 ...
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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 ...
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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 - ...
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Why i can't get a IPv6 address from a relay network
My dhcp server using isc dhcpd v4.3.6,dhcpd6.conf file:
subnet6 2001:xx:xxx:xxx::/64 {
range6 2001:xx:xxx:xxx::10 2001:xx:xxx:xxx::ffff;
option dhcp6.name-servers 2001:...
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Is it common for DHCPv6 and RA to provide IPv6 addr in the same subnet?
For IPv6, both DHCP and RA (the "prefix information" option, with the A flag) can provide IPv6 addresses to hosts. I'm still confused if it's common for DHCPv6 and RA to provide IP addresses in the ...
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Issues with adding and using IPv6 "Predefined Options" on Windows Server 2012r2 DHCP
The Windows Server DHCP Service has the ability to add predefined options for IPv4 and IPv6 by right clicking on the protocol and selecting "Set Predefined Options"
On IPv4 they work in just the same ...
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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 ...
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Unnamed devices in server 2012 dhcpv6
I have a server 2012 R2 box running DHCP for IP v4 and v6. In reviewing the leases for the IP6, there are a set that do not have names. These have a DUID type of 04 as shown in this picture:
IPv6 ...
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ipv6: low level technical explanation of Stateless address autoconfiguration
I have a clear understanding of broadcast, DHCP and general network configuration for ipv4. I'm looking for a low level technical explanation of network configuration for ipv6.
Some of the terms that ...
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How to disable rapid-commit option on DHCPv6 client (systemd-networkd and dhcpcd)
I tried IPv6 support in Amazon EC2 VPC. Amazon EC2 VPC uses RA and DHCPv6 for IPv6 addressing.
Problem
AFAIK, a EC2 instance receives an RA message with manged flag, then it sends a DHCPv6 solicit ...
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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 ...
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How to set up IPv6 with Prefix Delegation (PD) on a Cisco ASA?
Our business internet provider recently enabled IPv6 for our fiber connection. They assigned us a /48 to use. Great, I can finally move away from using our 6in4 tunnel. Or not?...
They want us to use ...
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488
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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 ...
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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 ...
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DHCPv6 not working when UFW is enabled (Ubuntu 16.04 LTS)
So, as the title says, I setup a isc-dhcp-server for DHCPv6, which is working as long as UFW is disabled.
Once enabled, though I have all the necessary rules in place, and UFW is enabled for v6, it ...
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DHCPv6 CONFIRM message in Linux
I'm testing DHCPv6 client. One of the tasks I need to check is if the CONFIRM message is sent as described in RFC (if it occurs in specified timeout). I know that this message is sent to be sure if it ...
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