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Document interactions of rad(8), carp(4), and SOII:

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When running rad(8) on top of carp(4), ifconfig carp0 -soii is a good idea.
ok florian@ jmc@
This commit is contained in:
stsp 2018-11-09 21:33:55 +00:00
parent ac45176945
commit a3ec52dc1a
1 changed files with 14 additions and 2 deletions
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16
usr.sbin/rad/rad.8
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@ -1,4 +1,4 @@
.\" $OpenBSD: rad.8,v 1.2 2018/08/03 20:09:48 jmc Exp $
.\" $OpenBSD: rad.8,v 1.3 2018/11/09 21:33:55 stsp Exp $
.\"
.\" Copyright (c) 2018 Florian Obser <florian@openbsd.org>
.\" Copyright (c) 2016 Kenneth R Westerback <kwesterback@gmail.com>
@ -15,7 +15,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: August 3 2018 $
.Dd $Mdocdate: November 9 2018 $
.Dt RAD 8
.Os
.Sh NAME
@ -146,3 +146,15 @@ The
.Nm
program was written by
.An Florian Obser Aq Mt florian@openbsd.org .
.Sh CAVEATS
When running
.Nm
on a
.Xr carp 4
interface, it is recommended to either disable SOIIs (persistent Semantically
Opaque Interface Identifiers) on the interface with
.Xr ifconfig 8 ,
or ensure that all CARP peers have the same SOII key stored in
.Pa /etc/soii.key .
Otherwise the default IPv6 router's link-local address will change during CARP
failover, which temporarily disrupts connectivity of IPv6 autoconf clients.