Date: Tue, 21 Jun 2022 19:10:04 +0200 From: Stefan Bethke <stb@lassitu.de> To: freebsd-net@freebsd.org Subject: fib 1 DHCP and RA default route Message-ID: <6B824787-2D1D-4811-8EB3-0C59E253DBE3@lassitu.de>
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[-- Attachment #1 --] I'm setting up a new router that has both an ADSL/PPPoE and a cable modem upstream. I've configured mpd5 for the PPPoE connection, and I'd like to have the cable modem provide a second, independent connection through FIB 1 over igb2. rc.conf (partially): ifconfig_igb2_descr="Cable Modem" ifconfig_igb2="DHCP fib 1" ifconfig_igb2_ipv6="inet6 accept_rtadv defaultif" gateway_enable="YES" ipv6_gateway_enable="YES" pf_enable="YES" dhclient_flags="-b" dhcp6c_enable="YES" dhcp6c_interfaces="igb2" dhcp6c_fib=1 I think this should be sufficient to receive both an IPv4 and IPv6 address and a default route, however, neither one is added. When I manually add them, they are removed after a while. $ ifconfig igb2 igb2: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 description: Cable Modem options=4e527bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,NOMAP> ether 00:0d:b9:xx:xx:62 inet6 fe80::20d:b9ff:fe58:5262%igb2 prefixlen 64 scopeid 0x3 inet6 2a02:8108:0:90:xxxx:8eb4:28c2:6315 prefixlen 128 inet 31.16.xxx.4 netmask 0xffffff00 broadcast 31.16.xxx.255 fib: 1 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=8023<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL,DEFAULTIF> $ setfib 1 netstat -rnfinet Routing tables (fib: 1) Internet: Destination Gateway Flags Netif Expire 31.16.xxx.0/24 link#3 U igb2 31.16.xxx.4 link#3 UHS lo0 127.0.0.1 link#4 UHS lo0 $ setfib 1 netstat -rnfinet6 Routing tables (fib: 1) Internet6: Destination Gateway Flags Netif Expire ::/96 ::1 UGRS lo0 ::1 link#4 UHS lo0 ::ffff:0.0.0.0/96 ::1 UGRS lo0 2a02:8108:0:90:xxxx:8eb4:28c2:6315 link#3 UHS lo0 2a02:8108:xxxx:9d00::/64 link#17 U br103 2a02:8108:xxxx:9d00:0:ff:fe00:367 link#17 UHS lo0 fe80::/10 ::1 UGRS lo0 fe80::%igb2/64 link#3 U igb2 fe80::20d:b9ff:fe58:5262%igb2 link#3 UHS lo0 ff02::/16 ::1 UGRS lo0 For IPv6, I thought that setting defaultif would make the kernel add the default route when an appropriate RA is received, and on my old router, that was working; I can't seem to see what difference I have in the config, apart from using FIB 1 instead of the default. And for IPv4, I see that I get the default router through DHCP, but somehow /sbin/dhclient-script is not adding a default route. If I add it manually, it will be removed eventually. Any suggestions? Stefan -- Stefan Bethke <stb@lassitu.de> Fon +49 151 14070811 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEJ+hF98o4r3eU/HiPD885WK4W4sEFAmKx+20ACgkQD885WK4W 4sFkRQf+OAPVYw/hjKLaBp/6TelWOfBbZiBVrgA0l78C2ftB9SDXItg1I/evnF7/ b3wJYV+hvFuACbr2RW/Q+mrys9g98T1asp+lxaLC1EgW0/xmeOI9ujFMGR//FK9e cDsGr6M2vbW8rFEhavtfpNG+zKpgqiF6qB4gY3B/eHBlBlEgf9BOo3Mto80CFXTW hO793ZY78T26jLWj2sMs0/AZGC35uZTO7r/iwQgYtW3HvCiCkaSMEh6PJE68xzhA iOZabbw8DRpCzCUk5WmZZJMXk+G4TaqDMQ7Pp0vhE97d6Ar+0Ki/kQ4UgEMamcGm IeZhF2JKW5a+sHVTxndzBqkfFyXR+A== =z348 -----END PGP SIGNATURE-----
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