Unable to add default root no such device error in linux

Question

I try have access internet so i should add default route to my linux server my ip address is 10.1.1.1 but my default gateway is 20.1.1.1

I tried to add default gateway with route add default 20.1.1.1 but get error :

siocaddrt: no such device

I tried to use virtual nic like eth0:0 to add ip address in range my default gateway where linux permit me to add default gateway but again I get error as same last error.

Answer 1

I find solution first i add route to another subnet

route add e.f.g.h/32 dev eth0:1

second i add:

route add default gw e.f.g.h

and my problem solved, i hope no one stick in this error .