Virtual ip on linux not working on the network

I tried to setup one virtual ip on my linux box using:

ifconfig eth0:1 192.168.1.200 netmask 255.255.255.0 up
route add -host 192.168.1.200 dev eth0:1


my eth0 card has the ip 192.168.1.199 this is the physical card and
192.168.1.200 is the virtual address i want to add to this interface.

The default gateway for this machine is 192.168.1.1

This works fine on the same box, i can ping the 192.168.1.200 address
but on the network i cant reach the ip 192.168.1.200.

If i go to another segment of the network, lets say 192.168.100.1 i
can ping 192.168.1.199 the real interface but i cant ping
192.168.1.200 the virtual interface.

If i setup another machine on the same switch with the 192.168.1.199
ip i can see this ip from anywhere in the network. (so the routing on
the network is ok)

What is the real way to make a virtual ip on linux and what i have to
do for this ip to be visible to the network ?

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,--- invasyon writes:
| I tried to setup one virtual ip on my linux box using:

| ifconfig eth0:1 192.168.1.200 netmask 255.255.255.0 up
| route add -host 192.168.1.200 dev eth0:1

The above 'route' statement is not required, as adding an interface
implicitly creates a route for that, and hence no need to explicitly
create the route.

| my eth0 card has the ip 192.168.1.199 this is the physical card and
| 192.168.1.200 is the virtual address i want to add to this interface.

| The default gateway for this machine is 192.168.1.1

| This works fine on the same box, i can ping the 192.168.1.200 address
| but on the network i cant reach the ip 192.168.1.200.

| If i go to another segment of the network, lets say 192.168.100.1 i
| can ping 192.168.1.199 the real interface but i cant ping
| 192.168.1.200 the virtual interface.

| If i setup another machine on the same switch with the 192.168.1.199
| ip i can see this ip from anywhere in the network. (so the routing on
| the network is ok)

| What is the real way to make a virtual ip on linux and what i have to
| do for this ip to be visible to the network ?

Looks like ARP announcement for 192.168.1.200 is not reaching the
network switch or is being filtered. Also check your box's iptables,
and switch's settings.

HTH
- --
Ashish Shukla आशीष श�क�ल http://wahjava.wordpress.com/
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> | What is the real way to make a virtual ip on linux and what i have to
> | do for this ip to be visible to the network ?
>
> Looks like ARP announcement for 192.168.1.200 is not reaching the
> network switch or is being filtered. Also check your box's iptables,
> and switch's settings.


iptables on this machine is empty (iptables -F)

i tried pinging the router from this virtual interface (ping -vc1 -w
3 -I 192.168.1.200 192.168.1.1) and also the broadcast address (ping -
b -I 192.168.1.200 192.168.1.255) trying to clear the arp table on the
router and after a few seconds my interface was alive on the net...
thanks..