W dniu 7.06.2023 o 09:03, Benoit Chesneau pisze:
Hi all,
Hello !
What I am trying to achieve is to connect to remote peers using information found in fib1 routing table setup in freebsd and export / import routing information in this table using BGP. I don't know your exact requirements, but you can use fib 0 for peering and fib 1 for keeping routes, that's common. You can also run BIRD under fib 1 and use fib 0, 1 or even 2 for routes keeping, that's all allowed.
The issue I have right now is that this configuratin doesn't work. It can't connect to the remote A.B.C.0 ip and I get such errors in logs:
``` 2023-06-06 02:05:58.571 <TRACE> enkiv4: A.B.C.D/24: ignored 2023-06-06 02:05:58.571 <TRACE> enkiv4: A.B.C.D/32: [alien] created 2023-06-06 02:05:58.571 <TRACE> enkiv4.ipv4 > added [best] A.B.C.D/32 0L 4G unicast 2023-06-06 02:05:58.571 <TRACE> enkiv4.ipv4 < rejected by protocol A.B.C.D/32 0L 4G unicast ```
Is this pattern expected to work? I am wondering if it's not an issue in Freebsd 13.2p0 version. I tried different combination these days without success. Any help would be much appreciated :)
The connection used for bgp arrived on a vlan 20 on nic2 which I setup on fib1, while the management interface is on another nic (bge0) and get its IP using DHCP:
``` bge0 ---> fib 0 (used for management) DHCP vlan20 -> fib 1 (connect to remote BGP peer) , static /31 IPV4 ```
Is BIRD running in fib 1 ? Are you invoking bird from setfib(1)?
Here is a snippet of network setup:
``` # ifconfig bge0 bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=c019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE> ether 94:18:82:7b:88:20 inet6 fe80::9618:82ff:fe7b:8820%bge0 prefixlen 64 scopeid 0x3 inet 192.168.88.249 netmask 0xffffff00 broadcast 192.168.88.255 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
# ifconfig vlan20 vlan2021: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=680703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6> ether 50:65:f3:8b:98:71 inet A.B.C.1 netmask 0xfffffffe broadcast 255.255.255.255 inet6 fe80::5265:f3ff:fe8b:9871%vlan2021 prefixlen 64 scopeid 0xb groups: vlan vlan: 20 vlanproto: 802.1q vlanpcp: 0 parent interface: mlxen0 fib: 1 media: Ethernet autoselect (40Gbase-CR4 <full-duplex,rxpause,txpause>) status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
$ sudo netstat -rn4 Routing tables
Internet: Destination Gateway Flags Netif Expire A.B.C.0/31 link#11 U vlan2021 A.B.C.1 link#11 UHS lo0 127.0.0.1 link#7 UHS lo0 ```
This is routing table for fib 0, what about: $netstat -rn4 -F1 ?
A minimal setup (edited for anonymization) in Bird is the following
``` router id A.B.C.1; ipv4 table tabv4 sorted;
protocol kernel enkiv4 { learn; kernel table 1; ipv4 { table tabv4; import all; export all; }; }
protocol bgp transit_ipv4_1 { local A.B.C.1 as XXXX; neighbor A.B.C.0 as XXXX; default bgp_med 0; default bgp_local_pref 50; password "somepass"; ipv4 {
table tabv4; import keep filtered; import filter ebgp_import; export filter ebgp_export; next hop self; }; }; ```
routes that will be adverised are setup as blackhole routes directly in FreeBSD. Should I setup them using the static protocol?
Benoît
-- Marek Zarychta