Multiple IPv4 addresses on a single network adapter

[victorvas]

Hi. The network is divided into subnets and the computer needs access to
these subnets to route information. How to add additional IPv4 addresses to a single network adapter?

[fvgit]

hostname.if(5)

There's an extensive example a little down the manpage. Check out the alias lines.

[J65nko]

You did not show the actual network layout, but usually accessing subnets is done with routing, and not by adding multiple addresses to a single host.

If I would have to access the 10.14.91.00/24 network and the host 192.168.0.102 can reach that network, I would manually add a route with:

# route add -net 10.14.91 -host 192.168.0.102
add net 10.14.91: gateway 192.168.0.102

There is a nice example of manual route setup for three networks at https://en.wikipedia.org/wiki/Defaul...y#Multi-router

[jggimi]

It is valid to configure multiple IP subnets over a single network segment -- a single Ethernet network, for example.

But it can be confusing, because routing between subnets that share a network segment is physically unnecessary, and consumes bandwidth as it replicates packets. If routing in this fashion is being used for governance, it may be ineffective -- devices can easily circumvent it and communicate directly.


Typically, IP subnets are aligned with unique network segments.