>Number: 154943
>Category: misc
>Synopsis: ifconfig gifX create on existing gifX clears IP
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Feb 21 17:30:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Piotr KUCHARSKI
>Release: FreeBSD 8.2-PRERELEASE amd64
>Organization:
>Environment:
System: FreeBSD 8.2-PRERELEASE #18 r218734M: Wed Feb 16 18:19:49 CET 2011
with zfs 28 patches applied (though it should not matter)
>Description:
erroneous 'ifconfig gifX create' (on a wrong gif interface) clears
existing IP assignments (which of course destroys all tcp connections using
it)
this seems like a regression from 8.1
>How-To-Repeat:
# ifconfig gif5 create
# ifconfig gif5 tunnel 172.16.0.1 172.31.255.254
# ifconfig gif5 10.0.0.1 10.0.0.2
# ifconfig gif5
gif5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
tunnel inet 172.16.0.1 --> 172.31.255.254
inet 10.0.0.1 --> 10.0.0.2 netmask 0xff000000
options=1<ACCEPT_REV_ETHIP_VER>
# ping 10.0.0.2 # just to verify it works, even if it should not matter
64 bytes from 10.0.0.2: icmp_seq=0 ttl=64 time=27.267 ms
# ifconfig gif5 create
ifconfig: ioctl (SIOCAIFADDR): Destination address required
# ifconfig gif5
gif5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
tunnel inet 172.16.0.1 --> 172.31.255.254
options=1<ACCEPT_REV_ETHIP_VER>
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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