Multiple IP addresses on one NIC and Multiple internet connections on one nic

isp isps nic ip alias ip aliasing multiple ips on one nic

Multiple Connections to the Internet / two isps on one nic

/etc/iproute2# cat rt_tables

reserved values

255 local 254 main 253 default 0 unspec

local
1 inr.ruhep

82 sdsl 188 fibre

ip route add 82.94.91.64/28 dev eth0 src 82.94.91.77 table sdsl ip route add default via 82.94.91.65 table sdsl ip rule add from 82.94.91.64/28 table sdsl

ip route add 188.204.140.192/27 dev eth0 src 188.204.140.196 table fibre ip route add default via 188.204.140.193 table fibre ip rule add from 188.204.140.192/27 table fibre

to check: ip rule show ip route list table fibre ip route list table sdsl

More information: http://linux-ip.net/html/adv-multi-internet.html#ex-adv-multi-internet-outbound-ip-

routing

http://www.policyrouting.org/iproute2.doc.html#ss9.5

ip address management with ip addr - http://linux-ip.net/html/tools-ip-address.html#tb-tools-ip-addr-scope

ip addr add 188.204.140.195/27 brd 188.204.140.223 dev eth1 label eth1:1

A lot on policy routing - http://www.policyrouting.org/iproute2.doc.html#ss9.5

ip link list - shows the physical devices ip addr list - shows the adressees the links have ip addr show dev eth0

Basic ip route - http://linux-ip.net/html/tools-ip-route.html

ip route list - like netstat -rn

/etc/iproute2/rt_tables - contains the routing tables

ip route show table local / main - shows the specified table