docs/172743: IPv6 handbooks lacks info about accepting router advertisements

[Wade Duvall]

>Number:         172743
>Category:       docs
>Synopsis:       IPv6 handbooks lacks info about accepting router advertisements
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Oct 16 01:10:00 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Wade Duvall
>Release:        9.0-RELEASE
>Organization:
>Environment:
FreeBSD <hostname redacted> 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Oct 16 16:15:22 EDT 2012     <hostname redacted>:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
The IPv6 handbook page (found here http://www.freebsd.org/doc/handbook/network-ipv6.html) explains how to set up a static ipv6 addr, but not how to accept router advertisements. It should contain something to the effect of:

ifconfig_$if_ipv6="accept_rtadv" is used to enable IPv6 router advertisements.
>How-To-Repeat:
Boot up a fresh 9.0-RELEASE on an IPv6 enabled network with SLAAC and follow instruction on IPv6 handbook page. Observe yourself getting no IPv6
>Fix:
Add ifconfig_$if_ipv6="accept_rtadv" and a bit about accepting router advertisements to the docs

>Release-Note:
>Audit-Trail:
>Unformatted: