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

Copied over from the forum where I also posted it:

rtadvd/should,/by the documentation, allow me to control the SLACC 
pltime and vltime intervals. I have the following in my /etc/rtadvd.conf 
file:

Code:

|# Set the preferred lifetime to 10 minutes on advertised prefixes. # 
All other parameters are default. # default:\ :pltime#3600:\ 
:vltime#86400:\ :prefixlen#64: ix1:\ :pltime#3600:\ :vltime#86400:\ 
:prefixlen#64: ix1.4:\ :pltime#3600:\ :vltime#86400:\ :prefixlen#64:|

And it is invoked with this in /etc/rc.conf:
Code:

|# # Ipv6 routing; we MUST be an IPv6 router for the INTERNAL interface 
to # distribute IPv6 # rtadvd_enable="Yes" rtadvd_interfaces="ix1 ix1.4"|

And is indeed running with these two interfaces (the latter is a VLAN)

However, when a device gets a SLACC address....
Code:

|[karl@NewFS ~]$ ifconfig mce0 mce0: 
flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> 
metric 0 mtu 1500 
options=66ef07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,NV,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,HWRXTSTMP,MEXTPG,VXLAN_HWCSUM,VXLAN_HWTSO> 
ether 50:6b:4b:12:c8:58 inet 192.168.10.100 netmask 0xffffff00 broadcast 
192.168.10.255 inet6 fe80::526b:4bff:fe12:c858%mce0 prefixlen 64 scopeid 
0x4 inet6 2606:83c0:8000:1b00:526b:4bff:fe12:c858 prefixlen 64 autoconf 
pltime 604800 vltime 2592000 media: Ethernet 10GBase-CR1 
<full-duplex,rxpause,txpause> status: active nd6 
options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>|

Note the pltime and vltime.

And a tcpdump shows indeed that while rtadvd is advertising, it is 
sending the defaults and NOT what I set:
Code:

|[root@NewFS /home/karl]# tcpdump -v -n -i mce0 icmp6 and ip6[40] == 134 
tcpdump: listening on mce0, link-type EN10MB (Ethernet), snapshot length 
262144 bytes 13:25:49.345417 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|

And further, on the gateway:
Code:

|root@IpGw:/usr/local/etc # rtadvctl show ix1: 
flags=<UP,CONFIGURED,PERSIST> status=<RA_SEND> mtu 1500 DefaultLifetime: 
30m MinAdvInterval/MaxAdvInterval: 3m20s/10m AdvLinkMTU: <none>, Flags: 
<none>, Preference: medium ReachableTime: 0s, RetransTimer: 0s, 
CurHopLimit: 64 AdvIfPrefixes: yes Next RA send: Wed Jul 23 13:29:52 
2025 Last RA send: Wed Jul 23 13:25:49 2025 ix1.4: 
flags=<UP,CONFIGURED,PERSIST> status=<RA_SEND> mtu 1500 DefaultLifetime: 
30m MinAdvInterval/MaxAdvInterval: 3m20s/10m AdvLinkMTU: <none>, Flags: 
<none>, Preference: medium ReachableTime: 0s, RetransTimer: 0s, 
CurHopLimit: 64 AdvIfPrefixes: yes Next RA send: Wed Jul 23 13:28:31 
2025 Last RA send: Wed Jul 23 13:19:55 2025|


Ok, what am I missing? That /etc/rtadvd.conf syntax certainly LOOKS correct.

Freebsd-14.3-STABLE, if it matters.

This isn't a "critical" problem but if I have reason to restart the 
gateway, for example, and it gets a different Ip6 delegation, the old 
SLACC addresses stick around for a looooooong time -- and I'd prefer 
they not, obviously.

-- 
Karl Denninger
karl@denninger.net
/The Market Ticker/
/[S/MIME encrypted email preferred]/