Re: rtadvd appears to ignore options set in /etc/rtadvd.conf

From: John Hay <john_at_sanren.ac.za>
Date: Thu, 24 Jul 2025 03:26:12 UTC
Hi Karl,

What if you use a = instead of the #? For example :vltime=86400:

I set rdnss and dnssl using = and that works.

John


On Thu, 24 Jul 2025 at 01:38, Karl Denninger <karl@denninger.net> wrote:

> On 7/23/2025 16:47, Bjoern A. Zeeb wrote:
>
> On Wed, 23 Jul 2025, Karl Denninger wrote:
>
> Hi,
>
> (sorry I deleted the message as the tex/only part was barely parsable).
>
> Can you, for testing, try adding an
>     addr="xxx:xxx:xxx:xxxx::":\
> to one of your entries and see if the behaviour changes?
>
> /bz
>
> root@IpGw:/etc # more /etc/rtadvd.conf
> # Set the preferred lifetime to 10 minutes on advertised prefixes.
> # All other parameters are default.
> #
> default:\
>         :vltime#86400:\
>         :pltime#3600:\
>         :prefixlen#64:addr="xxx:xxx:xxx:xxxx::":
> ix1:\
>         :vltime#86400:\
>         :pltime#3600:\
>         :prefixlen#64:addr="xxx:xxx:xxx:xxxx::":
> ix1.4:\
>         :vltime#86400:\
>         :pltime#3600:\
>         :prefixlen#64:
>
> No change -- the announcement is going out on ix1 from the gateway.
>
> On machine receiving the advertisements:
>
> 19:35:49.085297 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 56)
> fe80::2e0:b4ff:fe68:f895 > ff02::1: [icmp6 sum ok] ICMP6, router
> advertisement, length 56
>         hop limit 64, Flags [none], pref medium, router lifetime 1800s,
> reachable time 0ms, retrans timer 0ms
>           source link-address option (1), length 8 (1): 00:e0:b4:68:f8:95
>           prefix info option (3), length 32 (4): 2606:83c0:8000:1b00::/64,
> Flags [onlink, auto], *valid time 2592000s, pref. time 604800s*
>
>
> --
> Karl Denninger
> karl@denninger.net
> *The Market Ticker*
> *[S/MIME encrypted email preferred]*
>