Date: Sat, 5 Mar 2011 19:43:41 +0100 From: fredrik danerklint <fredan@fredan.se> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: ifconfig lo1 down Message-ID: <201103051943.41917.fredan@fredan.se>
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Hi,
I would like to know what is the differents between ip4 and ip6 for this
command.
First:
#ifconfig lo1
lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3<RXCSUM,TXCSUM>
inet xx.xx.xx.2 netmask 0xffffffff
inet6 2a03:xxxx:xxxx::xxxx:xx02 prefixlen 128
nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
$ ping xx.xx.xx.2
PING xx.xx.xx.2 (xx.xx.xx.2): 56 data bytes
64 bytes from xx.xx.xx.2: icmp_seq=0 ttl=64 time=0.012 ms
64 bytes from xx.xx.xx.2: icmp_seq=1 ttl=64 time=0.010 ms
^C
and
$ ping6 2a03:xxxx:xxxx::xxxx:xx02
PING6(56=40+8+8 bytes) 2a03:xxxx:xxxx::xxxx:xx02 --> 2a03:xxxx:xxxx::xxxx:xx02
16 bytes from 2a03:xxxx:xxxx::xxxx:xx02, icmp_seq=0 hlim=64 time=0.053 ms
16 bytes from 2a03:xxxx:xxxx::xxxx:xx02, icmp_seq=1 hlim=64 time=0.032 ms
^C
Now we run this command:
# ifconfig lo1 down
and trying to ping again:
$ ping xx.xx.xx.2
PING xx.xx.xx.2 (xx.xx.xx.2): 56 data bytes
ping: sendto: No route to host
ping: sendto: No route to host
ping: sendto: No route to host
^C
--- xx.xx.xx.2 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss
works as expected (and this is what I want) but this command, however:
$ ping6 2a03:xxxx:xxxx::xxxx:xx02
PING6(56=40+8+8 bytes) 2a03:xxxx:xxxx::xxxx:xx02 --> 2a03:xxxx:xxxx::xxxx:xx02
16 bytes from 2a03:xxxx:xxxx::xxxx:xx02, icmp_seq=0 hlim=64 time=0.048 ms
16 bytes from 2a03:xxxx:xxxx::xxxx:xx02, icmp_seq=1 hlim=64 time=0.033 ms
16 bytes from 2a03:xxxx:xxxx::xxxx:xx02, icmp_seq=2 hlim=64 time=0.032 ms
^C
--- 2a03:xxxx:xxxx::xxxx:xx02 ping6 statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.032/0.038/0.048/0.007 ms
My question is why is it not the same behavior of ip6 as of ip4?
--
//fredan
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