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HOWTO: multiple default routes
Thanks to phoenix help I was able to setup multiple default routes, or a default route per network/interface to be precise, in Debian/Linux it is as simple as that:
/etc/network/interfaces Code:
iface eth0 inet static address 10.0.0.1 netmask 255.255.255.0 gateway 10.0.0.254 iface eth1 inet static address 20.0.0.1 netmask 255.255.255.0 gateway 20.0.0.254 Code:
NETWORK0 NETWORK1 \ / \ / \ / \ / \ / ROUTER0 ROUTER1 10.0.0.254 20.0.0.254 \ / +------\----------------/------+ | \ / | | em0 em1 | | 10.0.0.1 20.0.0.1 | | | | FREEBSD BOX | | | +------------------------------+ We will have to use setfib(1) to create two (or more) separete routing tables per network/interface. Add these lines to /boot/loader.conf file: Code:
ipfw_load="YES" net.fibs=16 Code:
# cd /usr/src/sys/$( uname -m )/conf # cp GENERIC /root/ROUTES # ln -s /root/ROUTES # echo "options ROUTETABLES=16" >> ROUTES # cd /usr/src # make NO_MODULES=1 kernel KERNCONF=ROUTES KODIR=/boot/routes # mv /boot/routes/kernel /boot/kernel/kernel # reboot Nest set your networks/interfaces as usual in /etc/rc.conf file: Code:
ifconfig_em0="inet 10.0.0.1/24" ifconfig_em1="inet 20.0.0.1/24" # check /etc/rc.local for default routes All the rest configuration resides in /etc/rc.local file: Code:
# define default routes setfib 0 route delete default setfib 0 route add default 10.0.0.254 setfib 1 route delete default setfib 1 route add default 20.0.0.254 # assing route tables to interfaces ipfw -f flush ipfw add allow ip from any to any via lo0 ipfw add setfib 1 ip from any to any via em0 ipfw add setfib 0 ip from any to any via em1 ipfw add allow ip from any to any Code:
# /etc/rc.d/netif restart # /etc/rc.d/local restart
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