Hello,
I have a few questions about the IPIP tunnel... is it possible to establish a connection between more interfaces/virtual interfaces?

Example:
I have two PCs with multiple public IPs and virtual interfaces on both of them like
eth0: publicip_1
eht0:0 publicip_2
eth0:1 publicip_3
.
.
.

What I need is to use the publicips of the one server on another to send out traffic..

I was able to get it to work successfully between the eth0<->eth0 interfaces but when I use virtual interface to connect the IPIP tunnel like eth0:0<->eth0:0 then the servers cannot ping themself on the this tunnel ips...

Is there limitation in this that IPIP tunnel doesnt work when the remote public IP is on virtual interface?

Thank You in advance

bellow is configuration of the IPIP tunnel I use


if the publicip_server1 and publicip_server2 are assigned to eth0 interface on both servers then the tunnel is established and everything works... when I change this IP to IP of eth0:0 interface then I cannot ping the other PC in the tunnel.

first of all eth0:0 is not a virtual interface, it is an alias on eth0
secondly there is no reason to specify any interfaces for ip-ip, it works on higher layer:
it does not matter at which interface the public IP address is configured

Hello,

I dont specify the interface. The issue is that when I am trying to establish the tunnel using public IP address assigned to the aliased interface then it doesnt work, only when I specify the primary public IPs on eth0 it works

fandar, in both cases IP-address is configured on eth0 interface, eth0:0 is an alias for eth0