https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263986
Delta Regeer <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #9 from Delta Regeer <[email protected]> ---
I have a similar issue, but slightly different.
I have multiple interfaces:
igc4/vlan1001.
igc4 receives a default route/on-link prefix that is using a GUA and has a
valid router lifetime of greater than 0.
vlan1001 however is used only for storage traffic. It is a pure IPv6 only VLAN
and configuration is done with ULA addressing, that is advertised with a router
lifetime of 0.
Unfortunately that means that when vlan1001 accepted the router advertisement
it never installs the on-link route for the prefix it received, even though we
expressly want to force that /64 onto vlan1001 (10 GbE) instead of out through
igc4 (1 GbE).
Even adding a manual IP address in the same /64 will not install the on-link
route:
igc4: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0
mtu 1500
options=4e427bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_MAGIC,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,MEXTPG>
ether 20:7c:14:f4:83:f4
inet 172.16.109.131 netmask 0xffffff00 broadcast 172.16.109.255
inet6 fe80::227c:14ff:fef4:83f4%igc4 prefixlen 64 scopeid 0x5
inet6 2601:283:4c01:29a0:227c:14ff:fef4:83f4 prefixlen 64 autoconf
pltime 604800 vltime 2592000
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
vlan1001: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric
0 mtu 9000
options=4600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6,MEXTPG>
ether 20:7c:14:f4:83:f5
inet6 fe80::227c:14ff:fef4:83f5%vlan1001 prefixlen 64 scopeid 0xb
inet6 fd9b:d0c4:d2c8:736e::4 prefixlen 64
inet6 fd9b:d0c4:d2c8:736e:227c:14ff:fef4:83f5 prefixlen 64 detached
autoconf pltime 604800 vltime 2592000
groups: vlan
vlan: 1001 vlanproto: 802.1q vlanpcp: 0 parent interface: ix0
media: Ethernet autoselect (10Gbase-Twinax
<full-duplex,rxpause,txpause>)
status: active
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
# ndp -p
2601:283:4c01:29a0::/64 if=igc4
flags=LAO vltime=2592000, pltime=604800, expire=29d23h59m32s, ref=1
advertised by
fe80::4262:31ff:fe08:9276%igc4 (reachable)
# netstat -rn
Routing tables
Internet:
Destination Gateway Flags Netif Expire
default 172.16.109.1 UGS igc4
127.0.0.1 link#10 UH lo0
172.16.109.0/24 link#5 U igc4
172.16.109.131 link#10 UHS lo0
Internet6:
Destination Gateway Flags
Netif Expire
::/96 link#10 URS
lo0
default fe80::4262:31ff:fe08:9276%igc4 UG
igc4
::1 link#10 UHS
lo0
::ffff:0.0.0.0/96 link#10 URS
lo0
2601:283:4c01:29a0::/64 link#5 U
igc4
2601:283:4c01:29a0:227c:14ff:fef4:83f4 link#10 UHS
lo0
fd9b:d0c4:d2c8:736e::4 link#10 UHS
lo0
fd9b:d0c4:d2c8:736e:227c:14ff:fef4:83f5 link#10 UHS
lo0
fe80::%lo0/10 link#10 URS
lo0
fe80::%igc4/64 link#5 U
igc4
fe80::227c:14ff:fef4:83f4%lo0 link#10 UHS
lo0
fe80::%ix0/64 link#6 U
ix0
fe80::227c:14ff:fef4:83f5%lo0 link#10 UHS
lo0
fe80::%lo0/64 link#10 U
lo0
fe80::1%lo0 link#10 UHS
lo0
fe80::%vlan1001/64 link#11 U
vlan1001
fe80::227c:14ff:fef4:83f5%lo0 link#10 UHS
lo0
ff02::/16 link#10 URS
lo0
# rdisc6 igc4
Soliciting ff02::2 (ff02::2) on igc4...
Hop limit : 64 ( 0x40)
Stateful address conf. : No
Stateful other conf. : No
Mobile home agent : No
Router preference : medium
Neighbor discovery proxy : No
Router lifetime : 1800 (0x00000708) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
Source link-layer address: 40:62:31:08:92:76
Prefix : 2601:283:4c01:29a0::/64
On-link : Yes
Autonomous address conf.: Yes
Valid time : 2592000 (0x00278d00) seconds
Pref. time : 604800 (0x00093a80) seconds
Recursive DNS server : fd9b:d0c4:d2c8:6c6f::1
DNS server lifetime : 900 (0x00000384) seconds
DNS search list : home.arpa
DNS search list lifetime: 900 (0x00000384) seconds
from fe80::4262:31ff:fe08:9276
# rdisc6 vlan1001
Soliciting ff02::2 (ff02::2) on vlan1001...
Hop limit : 64 ( 0x40)
Stateful address conf. : No
Stateful other conf. : No
Mobile home agent : No
Router preference : medium
Neighbor discovery proxy : No
Router lifetime : 0 (0x00000000) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
Source link-layer address: 40:62:31:08:92:76
Prefix : fd9b:d0c4:d2c8:736e::/64
On-link : Yes
Autonomous address conf.: Yes
Valid time : 2592000 (0x00278d00) seconds
Pref. time : 604800 (0x00093a80) seconds
from fe80::4262:31ff:fe08:9276
Both FreeBSD and Linux will create an ip address, but Linux will happily
install the on-link prefix, whereas FreeBSD will not.
Note that I would expect that no matter what as long as a prefix does not clash
with an existing prefix on the system, I would expect it to be installed
on-link correctly, even if the router lifetime is 0 and there is no ::/0 route
provided on that network segment. Whether that address is ULA (as is the case
from Filipe or myself) or GUA, since the same issue exists when I use a GUA
prefix on the same network.
While searching for bugs I did find this other bug:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=104851 that seems to be
somewhat related, and probably in the same part of the codebase.
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