I forgot to mentioned, just to be clear, these IFs are all
one node, the same one hos, its routing table:
10.5.6.0 0.0.0.0 255.255.255.0 U 350
0 0 nm-team1
172.25.12.0 0.0.0.0 255.255.255.0 U 100
0 0 p3p3
192.168.2.0 0.0.0.0 255.255.255.0 U 110
0 0 em2
192.168.2.0 0.0.0.0 255.255.255.0 U 111
0 0 em1
no default gateways, so you can see these are directly
connected networks
$ traceroute -n 10.5.6.17 -i em1
traceroute to 10.5.6.17 (10.5.6.17), 30 hops max, 60 byte
packets
1 10.5.6.17 0.426 ms !X 0.393 ms !X 0.311 ms !X
$ traceroute -n 10.5.6.17 -i em2
traceroute to 10.5.6.17 (10.5.6.17), 30 hops max, 60 byte
packets
1 10.5.6.17 0.382 ms !X 0.326 ms !X 0.274 ms !X
$ traceroute -n 10.5.6.17 -i nm-team1
traceroute to 10.5.6.17 (10.5.6.17), 30 hops max, 60 byte
packets
1 10.5.6.17 0.407 ms !X 0.342 ms !X 0.294 ms !X
$ traceroute -n 10.5.6.17 -i p3p3
traceroute to 10.5.6.17 (10.5.6.17), 30 hops max, 60 byte
packets
1 * * *
2 * * *
3 * * *
4 * * *
I was expecting kernel's network would know best, what to
do, especially that: (enp6s0f0 is 10.5.6.17)
root@10.5.6.17 ]$ ping 172.25.12.222 -I enp6s0f0
PING 172.25.12.202 (172.25.12.222) from 10.5.6.17 enp6s0f0:
56(84) bytes of data.
64 bytes from 172.25.12.222: icmp_seq=1 ttl=64 time=0.396 ms
there are two switches and vlans, switches routes auto
configured, no default gateways on the switches neither, to
try to simplify & troubleshoot.
regards
L.
On 16/08/16 11:59, John R Pierce wrote:
On 8/16/2016 3:53 AM, lejeczek wrote:
$ ping 10.5.6.17 -I p3p3
PING 10.5.6.17 (10.5.6.17) from 172.25.12.202 p3p3:
56(84) bytes of data.
and nothing, ping waits and no reply, Ctrl+C
with such a simple setup rules based routing should not
be involved, kernel should figure it out, right?
you specifically said to send that packet to an interface
on the wrong network, of course, its not going to get
through, unless there's an external route from that
network to the destination. I'm presuming there's a router
somewhere else between your 192.168.2.0/24 network and
10.5.6.17, that would enable those ping -I em1/2 commands
to work. note that the recipient of the ping needs to
have a route to get back to the source, too.
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