I'm not sure, if this was the right list to ask for this? It seems to me, that this list is for patches only...
On 21.10.2016 00:00, Matthias Peter Walther wrote: > Hello, > > I'm Matthias and I'm new to this list. I just signed up, to ask the > following question. > > I have a configuration like this: > > root@des1 ~ # ip rule > 0: from all lookup local > 32765: from all iif lo lookup ffnet suppress_prefixlength 0 > 32766: from all lookup main > 32767: from all lookup default > (ffnet is table 42) > root@des1 ~ # ip r s > default via 5.9.86.151 dev eth0 > 5.9.86.151 dev eth0 proto kernel scope link src 5.9.86.144 > root@des1 ~ # ip r s t 42 > blackhole default > > I have the default routing table, and a routing table number 42. I > could use an ip rule filtering by destination ip, but I wanted to try > suppress_prefixlength. > > Let's say I want to ping 8.8.8.8. What I expect is, that the package > is put into routing table 42 by the ip rule 32765. As there is no more > specific route for 8.8.8.8 than the default route in table 42, I > expect the suppress_prefixlength 0 option to put it back to the > default routing table and then to be send out through eth0. > > Instead this configuration takes the whole machine offline: > > root@des1 ~ # ping 8.8.8.8 > connect: Invalid argument > > When I delete the ip rule 32765 containing the suppress_prefixlength, > the machine is back online. > > Do I not understand the suppress_prefixlength-feature correctly or is > this a bug? I tested with Kernel 4.7 and 4.6, both show the same > behaviour as described above. > > Thanks for any replies in advance. > > Regards, > Matthias
