On 02/05/18(Wed) 14:45, Christopher Zimmermann wrote: > On 2018-05-02 Martin Pieuchot <m...@openbsd.org> wrote: > > On 02/05/18(Wed) 11:47, Christopher Zimmermann wrote: > > > I just want to bring this up again. Can some network guru give me an ok > > > or some feedback please? > > > > Can you explain with words why we shouldn't send a redirect? The > > comment above your diff states clearly: > > > > "If forwarding packet using same interface that it came in on, > > perhaps should send a redirect to sender to shortcut a hop." > > > > So you're suggesting no to do that, why? > > That's not exactly what I'm suggesting. > > In this setting: > > A 192.168.4.7 <--> 192.168.4.1 Gateway 192.168.1.1 <--> 192.168.1.2 B > > I observed this senseless redirect: > > 192.168.4.1 > 192.168.4.7: icmp: redirect 192.168.1.2 to host 192.168.4.1 > in plain language it means: > "Hi 192.168.4.7, I'm 192.168.4.1. You sent me a packet for 192.168.1.2. > I'm not the best route, next time send it to 192.168.4.1." > So the gateway is instructing host 192.168.4.7 to use gateway > 192.168.4.1 instead of 192.168.4.1. (this is not a typo!)
How does your routing table looks like?
