On Tue, Feb 27, 2018 at 5:14 PM, Klemen Sladic <gostur...@gmail.com> wrote: > Hi. > > I have a question regarding OSPF operation in some specific route > configuration. > > Let's say I have two devices, each has 2 network interfaces and both running > OSPF. > > ---------------------------- --------------------------| > | DEV1 | | DEV2 | > | eth0 eth1|<==>|eth1 eth0| > | 192.168.0.1 192.168.192.1| |192.168.192.2 192.168.1.1| > ---------------------------- --------------------------- > > The "default" kernel routes are like: > DEV1: > 192.168.192.0/24 dev eth1 proto kernel scope link src 192.168.192.1 > 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.1 > DEV2: > 192.168.192.0/24 dev eth1 proto kernel scope link src 192.168.192.2 > 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.1 > > OSPF and route distribution works as expected through this network. > > Now, I wanted to hide the eth1 subnet from the outside world by > setting 192.168.192.0/24 route source to eth0 IP address, like: > DEV1: > 192.168.192.0/24 dev eth1 scope link src 192.168.0.1 > DEV2: > 192.168.192.0/24 dev eth1 scope link src 192.168.1.1 > > This works from routing perspective, but it breaks OSPF. This is > probably expected, since this has broken a link between two > devices/neighbors. > > My question is if it is possible to somehow configure OSPF to > work with those modified route sources? To be able to exchange > OSPF messages by hopping over eth1 subnet?
Hello, Short answer: No. Longer answer: Use public IP addresses on routers which are visible to the public Internet or else translate ICMP messages from private IPs to public IPs at your network border. If you leak RFC1918 addresses you will probably break PMTUD which breaks TCP in mysterious and subtle ways engineered to drive you completely mad. Alternate answer: MPLS is the tool you're looking for. Regards, Bill Herrin -- William Herrin ................ her...@dirtside.com b...@herrin.us Dirtside Systems ......... Web: <http://www.dirtside.com/> _______________________________________________ Quagga-users mailing list Quagga-users@lists.quagga.net https://lists.quagga.net/mailman/listinfo/quagga-users