Hello
Am Donnerstag, 30. Mai 2013, 16:00:58 schrieb Michal Kubeček:
On Thursday 30 of May 2013 15:43EN, Jiri Slaby wrote:
On 05/30/2013 10:57 AM, Günther J. Niederwimmer wrote:
techz kernel: [ 2632.076419] IPv4: martian source 192.168.100.255
from 192.168.100.100, on dev eth1
techz kernel: [ 2632.076425] ll header: 00000000: ff ff ff ff ff ff
70 71 bc e2 cf fb 08 00 ......pq......
It is unlikely something to be broken in the networking stack. Better
question to ask is who is 192.168.100.100 and why it started telling
about itself to be 192.168.100.255... Hm?
I may have overlooked something but from the source it looks like this
might just mean that a packet from 192.168.100.100 to 192.168.100.255
has been received on an interface RP filter considers wrong.
Output of "ip addr show", "ip route show" and "ip neigh show" would
definitely tell us more.
OK.
ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: mtu 1500 qdisc pfifo_fast state UP
qlen 1000
link/ether 70:71:bc:e2:cf:fb brd ff:ff:ff:ff:ff:ff
inet 192.168.100.100/24 brd 192.168.100.255 scope global eth0
inet6 2001:15c0:65ff:868c:bd3d:4977:e126:5f91/64 scope global temporary
dynamic
valid_lft 585359sec preferred_lft 66359sec
inet6 2001:15c0:65ff:868c:7271:bcff:fee2:cffb/64 scope global dynamic
valid_lft 2591515sec preferred_lft 604315sec
inet6 fe80::7271:bcff:fee2:cffb/64 scope link
valid_lft forever preferred_lft forever
3: eth1: mtu 1480 qdisc pfifo_fast state UP
qlen 1000
link/ether 70:71:bc:e2:cf:fd brd ff:ff:ff:ff:ff:ff
inet6 2001:15c0:65ff:868c:a46a:6dcc:3c76:cb42/64 scope global temporary
dynamic
valid_lft 585359sec preferred_lft 66359sec
inet6 2001:15c0:65ff:868c:7271:bcff:fee2:cffd/64 scope global dynamic
valid_lft 2591515sec preferred_lft 604315sec
inet6 2001:15c0:65ff:868c::64/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::7271:bcff:fee2:cffd/64 scope link
valid_lft forever preferred_lft forever
4: wlan0: mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 6c:62:6d:25:57:b9 brd ff:ff:ff:ff:ff:ff
ip route show
default via 192.168.100.210 dev eth0
127.0.0.0/8 dev lo scope link
169.254.0.0/16 dev eth0 scope link
ip -6 route show
2001:15c0:65ff:868c::/64 dev eth1 proto kernel metric 256
2001:15c0:65ff:868c::/64 dev eth0 proto kernel metric 256 expires 2591820sec
fe80::/64 dev eth0 proto kernel metric 256
fe80::/64 dev eth1 proto kernel metric 256
default via 2001:15c0:65ff:868c::1 dev eth1 metric 1024
default via fe80::215:17ff:fe13:b8a7 dev eth1 proto ra metric 1024 expires
1620sec
default via fe80::215:17ff:fe13:b8a7 dev eth0 proto ra metric 1024 expires
1620sec
ip neigh show
fe80::215:17ff:fe13:b8a7 dev eth1 lladdr 00:15:17:13:b8:a7 router STALE
fe80::215:17ff:fe13:b8a7 dev eth0 lladdr 00:15:17:13:b8:a7 router STALE
2001:15c0:65ff:868c::1 dev eth1 lladdr 00:1b:21:6a:7c:4f router STALE
192.168.100.220 dev eth0 lladdr 00:15:17:13:b8:a6 STALE
192.168.100.210 dev eth0 lladdr 00:1c:c0:a3:9f:4b STALE
192.168.100.223 dev eth0 lladdr 00:16:3e:68:8e:bf REACHABLE
--
mit freundlichen Grüßen / best Regards,
Günther J. Niederwimmer
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