rc.conf changes IPV6

Dan The Man dan at sunsaturn.com
Tue Nov 22 01:50:34 UTC 2011

Good point, I did switch to new config, let me find a box I can take down 
and I'll report back. I assume you'd be right considering how shell 
scripting works, that would not make much sense...


Dan The Man
CTO/ Senior System Administrator
Websites, Domains and Everything else
Email: Dan at SunSaturn.com

On Mon, 21 Nov 2011, Doug Barton wrote:

> On 11/21/2011 17:39, Dan The Man wrote:
>> On Mon, 21 Nov 2011, Stefan Bethke wrote:
>>> Am 21.11.2011 um 20:25 schrieb Dan The Man:
>>>> I notice we have changed way IPV6 is done in rc.conf now.
>>>> I assume someone will update:
>>>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-ipv6.html
>>>> My question now concerns aliases, and what the norm will end up being.
>>>> Here is example below:
>>>> Here we have the new layout with IPV6, the below works fine, however
>>>> since
>>>> the ifconfig lines for IPV4 and IPV6 are essentially the same other
>>>> than the actual "inet" and "inet6", will it be ok to start with
>>>> alias0 for both IPV4 and IPV6, or should I in this example be
>>>> starting at alias4 for IPV6?
>>>> I would like idea to keep it way it is each protocal starting at alias0.
>>>> defaultrouter=""
>>>> hostname="sunsaturn.com"
>>>> #IPV4
>>>> ifconfig_em1="inet netmask"
>>>> ifconfig_em1_alias0="inet netmask"
>>>> ifconfig_em1_alias1="inet netmask"
>>>> ifconfig_em1_alias2="inet netmask"
>>>> ifconfig_em1_alias3="inet netmask"
>>>> #IPV6
>>>> ipv6_activate_all_interfaces="YES"
>>>> ipv6_network_interfaces="em1"
>>>> ipv6_defaultrouter="2001:49f0:4004:0000:0000:0000:0000:0001"
>>>> ifconfig_em1_ipv6="inet6 2001:49f0:4004:0000:0000:0000:0000:0002
>>>> prefixlen 48"
>>>> ifconfig_em1_alias0="inet6 2001:49f0:4004:0000:0000:0000:0000:0003
>>>> prefixlen 48"
>>>> ifconfig_em1_alias1="inet6 2001:49f0:4004:0000:0000:0000:0000:0004
>>>> prefixlen 48"
>>> Remember that rc.conf follows shell syntax and sematics, so the second
>>> _alias0 and _alias1 will overwrite the previous ones.
>>> In 9.0 you can use the ipv4_addrs_<ifname> variable to set both the
>>> IPv4 "main" address as well as "alias" addresses, see rc.conf(5).
>>> There doesn't seem to be an equivalent IPv6 option, as best as I can
>>> tell.
>> You would assume so Stefan, that the duplicate alias0 would overwrite,
>> but it seems since ifconfig separates the namespace for IPV4/IPV6 it
>> actually works.
> I don't see how that could possibly be true, how have you tested it?
> Doug
> -- 
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