https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205368
Bug ID: 205368
Summary: fails to shut down IPv6 loopback interfaces
Product: Base System
Version: 10.2-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: cwf...@gmx.net
FreeBSD 10.1 and 10.2 will not shut down IPv6 loopback interfaces properly.
Loopback Interfaces continue to function for IPv6 even when set "down", while
IPv4 on the very same interface behaves correctly:
nxnew# [~] uname -a
FreeBSD nxnew.whatever 10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666: Wed Aug 12
15:26:37 UTC 2015 r...@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
amd64
nxnew# [~] ifconfig lo1 create
nxnew# [~] ifconfig lo1 192.168.255.255/32
nxnew# [~] ifconfig lo1 inet6 fe80::1
nxnew# [~] ifconfig lo1 inet6 2001:db8:c01:ff::1/128
nxnew# [~] ping6 2001:db8:c01:ff::1
PING6(56=40+8+8 bytes) 2001:db8:c01:ff::1 --> 2001:db8:c01:ff::1
16 bytes from 2001:db8:c01:ff::1, icmp_seq=0 hlim=64 time=0.107 ms
16 bytes from 2001:db8:c01:ff::1, icmp_seq=1 hlim=64 time=0.058 ms
^C
--- 2001:db8:c01:ff::1 ping6 statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.058/0.083/0.107/0.024 ms
nxnew# [~] ifconfig lo1 down
nxnew# [~] ping6 -c 2 2001:db8:c01:ff::1
PING6(56=40+8+8 bytes) 2001:db8:c01:ff::1 --> 2001:db8:c01:ff::1
16 bytes from 2001:db8:c01:ff::1, icmp_seq=0 hlim=64 time=0.091 ms
16 bytes from 2001:db8:c01:ff::1, icmp_seq=1 hlim=64 time=0.053 ms
--- 2001:db8:c01:ff::1 ping6 statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.053/0.072/0.091/0.019 ms
nxnew# [~] ping -c 2 192.168.255.255
PING 192.168.255.255 (192.168.255.255): 56 data bytes
--- 192.168.255.255 ping statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss
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