This is a very simple userland application for layer-2 ping on
Linux. s2pingd runs as a daemon through systemd, and listens on
ethrenet interfaces using AF_PACKET socket. You can send echo request
frames using s2ping command, and receive reply frames from
s2pingd.
$ s2ping -h
s2ping [options] DSTMAC
-i interface, outgoing interface name (required)
-c count, how many packets xmit (0 means infinite)
-s size, size of probe packet
-I interval, second
-T timeout, second
-h print this help
$ s2ping -i bridge ce:e1:2e:bd:76:44 -c 5
S2PING to ce:e1:2e:bd:76:44 from 4a:d7:07:c2:e4:f2 (bridge) 64 bytes frame
64 bytes from ce:e1:2e:bd:76:44 seq=1 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=2 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=3 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=4 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=5 time=0.00 ms
5 frame(s) sent, 5 frame(s) received, 0.00% lost
git clone https://github.com/upa/s2pingd
cd s2pingd
make
sudo make install
Edit /etc/default/s2pingd.
$ cat /etc/default/s2pingd
# s2pingd options
#
# list of interfaces on which s2pingd runs
S2PINGD_OPTS="vetha vethb"
and, enable s2pingd service on systemd.
sudo systemctl enable s2pingd
sudo systemctl start s2pingd
- broadcast is useful.
$ s2ping -i bridge ff:ff:ff:ff:ff:ff
S2PING to ff:ff:ff:ff:ff:ff from 4a:d7:07:c2:e4:f2 (bridge) 64 bytes frame
64 bytes from ce:e1:2e:bd:76:44 seq=1 time=0.00 ms
64 bytes from 36:ba:10:e0:43:70 seq=1 time=0.00 ms
64 bytes from 36:ba:10:e0:43:70 seq=2 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=2 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=3 time=0.00 ms
64 bytes from 36:ba:10:e0:43:70 seq=3 time=0.00 ms
64 bytes from 36:ba:10:e0:43:70 seq=4 time=0.00 ms
64 bytes from ce:e1:2e:bd:76:44 seq=4 time=0.00 ms
^C
4 frame(s) sent, 4 frame(s) received, 0.00% lost
$
- btw, where is EtherOAM or BFD on Linux...?