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Bug#875308: linklocal ipv6 addresses in debian-installer netcfg



On 09/10/2017 05:02 PM, Michael Gebhard wrote:
> Package: debian-installer
> Version: 20170615+deb9u1
> 
> When entering link local ipv6 addresses with interface suffixes
> as gateway during the network configuration in the debian installer,
> the installer detects the address to be malformed.
> 
> Error message:
> "The IP address you provided is malformed. It should be in the form
> x.x.x.x where each 'x' is no larger than 255 (an IPv4 address), or a
> sequence of blocks of hexadecimal digits separated by colons (an IPv6
> address). Please try again."
> 
> Preseed file from attempting to use the debian installer with
> its network console to reproduce the error:
> 
> d-i debian-installer/locale string en_US
> d-i keyboard-configuration/xkb-keymap select us
> d-i debconf/priority select critical
> d-i auto-install/enabled boolean true
> d-i netcfg/choose_interface select eth0
> d-i netcfg/disable_dhcp boolean true
> d-i netcfg/get_nameservers string dead:beef:aaaa:aaaa::2
> d-i netcfg/get_ipaddress string dead:beef:aaaa:aaaa::1
> d-i netcfg/get_netmask string ffff:ffff:ffff:ffff::
> d-i netcfg/get_gateway string fe80::1%eth0
> d-i netcfg/confirm_static boolean true
> d-i netcfg/get_hostname string somehostname
> d-i netcfg/get_domain string somedomain
> d-i network-console/password password <password>
> d-i network-console/password-again password <password>
> 
> Entering the same ip address netmask and gateway manually produces the same error.
> 
> Configuring the same from a shell in the installer with:
> ip a add dead:beef:aaaa:aaaa::1 dev eth0
> ip l set dev eth0 up
> ip r add default via fe80::1 dev eth0
> Produces a functioning network configuration.
> 
> I suggest the debian installer should be able to deal with link local ipv6 addresses.

You redacted your link-local address to be dead:beef::. I suppose what
you actually mean is one with a fe80:: prefix? (I.e. it'd have been more
helpful to redact the MAC/actual address.)

Kind regards
Philipp Kern

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