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I have three IPs assigned to a single interface (modified results of netstat /rn):

2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether aa:aa:aa:aa:aa:aa brd ff:ff:ff:ff:ff:ff
    altname enp181s0f0
    inet 1.1.1.1/32 scope global eno1
       valid_lft forever preferred_lft forever
    inet 1.1.2.2/32 scope global eno1
       valid_lft forever preferred_lft forever
    inet 1.1.3.3/24 metric 100 brd 1.1.3.255 scope global dynamic eno1
       valid_lft 46655sec preferred_lft 46655sec

Is it possible to create a virtual network interface and route traffic to this virtual network interface from connections originating from IP addresses 1.1.1.1 and 1.1.2.2, leaving connections originating from 1.1.3.3 as is?

Edit: the "other end" of the virtual network will be for a VM (hosted in KVM)

Thank you.

Ali Khakbaz
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Shopgeek
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1 Answers1

0

This is the cobbled together solution.

-=-=-=-

ip link add veth0 type veth peer name veth1

ip link set veth0 up


ip link set veth1 up


ip link add br0 type bridge  # bridge for VM


ip link set br0 up


ip link set veth1 master br0 # link veth1 to the bridge


ip rule add from 1.1.1.1 lookup vmroute


ip rule add from 1.1.2.2 lookup vmroute


ip route add default dev veth0 table vmroute

-=-=-=-=-=-=

Then add the VM's virtual interface to the bridge.

Hope this helps someone.

Shopgeek
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