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.
Questions tagged [dhcpv6]
61 questions
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votes
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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 clients use DUIDs to
identify a server in…
SF.express
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2
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1 answer
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 custom option 56 in the configuration to be an…
vbeljan
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2
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1 answer
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 DHCP address. This feature is enabled by…
fukawi2
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2
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1 answer
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's routers.
The traffic dump shows two RS messages…
Xiatian
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2
votes
1 answer
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.
Does DHCPv6 have an equivalent of DHCPv4's private-use…
Craig McQueen
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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 way that they worked on 2008 and 2003, one can…
shouldbeq931
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1 answer
Fixed Size of IPv6 SLAAC
My confusion with IPv6 SLAAC is that the router provides the network prefix, and the host generates its own part using EUI-64, which means it is always going to be a 64-bit address.
Now, SLAAC is part of Router Advertisement and this is the only way…
Aashish K Goyal
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0 answers
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 not IPv6.
Apologies for the lengthy post.
My…
RuMAN S
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votes
1 answer
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 router as my main router plugged in my ISP ONT. I…
JB_DELR
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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 Configuration" flags are set)?
The RFCs (for both SLAAC and DHCPv6) don't…
lxgr
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2 answers
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't seem to have worked.
Hikari
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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 addresses and optional static addresses.
Currently…
TCB13
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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:xxx:xx::131;
default-lease-time …
Skytiger
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vote
1 answer
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 same subnet.
SF.express
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1 answer
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 PD, which would be fine except that our Cisco ASA…
Martijn Heemels
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