On 3/5/11 10:43 AM, fredrik danerklint wrote:
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?
I think IPV6 realizes it's sending to itself and short circuits it.. also, show ipv6 routes _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
