Background
My FreeBSD box has two interface, net0 is main fiber line(fast speed), net1 is backup line(Japan KDDI povo slow line).
At first, I set static route for backup wireguard line. Unfortenately, all packet to the static route([End Point IP address]) uses slow line[NG].
for Example previous config(/etc/rc.conf)
static_routes="backup_line"
route_backup_line="-net [End Point IP address] -gateway 192.168.220.1"
(192.168.220.1 is backup line default router)
Now I know the fib(Forwarding Informations Base), I use fib 1 for backup wireguard line.
Backup line is only used by below wireguard line[OK].
And I can remove above static route.
Step1: /etc/sysctl.conf
add below things into /etc/sysctl.conf(enable fibs)
net.fibs=2
net.add_addr_allfibs=1
Step2: /etc/rc.conf
# net1 is for fib1
ifconfig_ue0_name="net1"
ifconfig_net1="192.168.220.3/24 fib 1"
# set default route for fib 1
static_routes="fib1_default"
route_fib1_default="-fib 1 default -gateway 192.168.220.1"
Step3: /usr/local/etc/wireguard/wg0.conf
use PostUp line
[Interface]
Privatekey = [Privatekey]
Address = 10.8.41.1/24
table = off
ListenPort = 1111
PostUp = /sbin/ifconfig wg0 tunnelfib 1
[Peer]
PublicKey = IOx7n4S1rBZPlj6an2rMQSddj07RMQFkWPAyvtJsYnY=
AllowedIPs = 10.8.0.0/16, 192.168.0.0/24
Endpoint = [End Point IP address]:1111
PersistentKeepAlive = 30
NOTES:
When you uses multiple wireguard lines, if you want selectively to use net0(fast line)for one of wireguard line, you use wg*.conf without "PostUp = /sbin/ifconfig wg* tunnelfib 1".
