On Friday, 12 March 2021 10:15:04 GMT John Winters via GLLUG wrote: > On 11/03/2021 15:14, Chris Bell via GLLUG wrote: > > Hello, > > IPv6 is designed so that a single address can be allocated to multiple > > interfaces, for example in a round-robin, and a single interface can have > > multiple addresses. > > I am using Debian 10 Buster on various computers including RaspberryPi and > > find that I can manually add addresses to a running computer, but if I > > attempt to configure multiple addresses only the last is accepted, and > > all but one is lost after a reboot. > > I've found various ways of configuring additional IPv6 addresses on > Raspbian / Debian Buster. It depends to a large extent on whether it's > headless or using a graphical desktop - where there are desktop client > components which want to get involved. > > On a plain (headless) Raspbian system, what I did was to edit > /etc/dhcpcd.conf and added the following two lines at the end: > > interface eth0 > static ip6_address=2001:<more of it>:4001/64 > > That causes dhcpcd to allocate that one in addition to the one it > calculates from the MAC address. > > On another headless Raspberry Pi, but running plain Debian Buster (not > Raspbian) I put the following in /etc/network/interfaces.d/eth0 > > auto eth0 > allow-hotplug eth0 > iface eth0 inet dhcp > > iface eth0 inet6 static > address 2001:<the rest> > netmask 64 > > This causes the interface to be configured with *just* that IPv6 address > (no auto-calculated one) but you can always put additional ones there too. > > I suppose it depends on whether you're running dhcpcd or not. Raspbian > does by default, but Debian doesn't. > > HTH > John
Thanks for the suggestion, which I will try, but I have had problems with even dhcpcd.conf on a raspberrypi. Systemd instructions go into great detail, but it still does not enable more than one IPv6 address per interface. I hope that debian 11 Bullseye will work. -- Chris Bell Website http://chrisbell.org.uk -- GLLUG mailing list [email protected] https://mailman.lug.org.uk/mailman/listinfo/gllug
