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Date: Wed, 06 Nov 2013 01:43:35 +0100
From: Thomas Steen Rasmussen <thomas@gibfest.dk>
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Subject: ifconfig_if_aliases not documented in /etc/defaults/rc.conf or in
 handbook
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Hello there,

ifconfig_if_aliases can greatly simplify rc.conf for machines with
many IP aliases, since renumbering of all the _aliasN entries is
no longer needed. But the syntax is not documented in
/etc/defaults/rc.conf or in handbook at
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/configtuning-virtual-hosts.html

Consider the example aliases from the handbook link above:
ifconfig_fxp0_alias0="inet 10.1.1.2 netmask 255.255.255.255"
ifconfig_fxp0_alias1="inet 10.1.1.3 netmask 255.255.255.255"
ifconfig_fxp0_alias2="inet 10.1.1.4 netmask 255.255.255.255"
ifconfig_fxp0_alias3="inet 10.1.1.5 netmask 255.255.255.255"
ifconfig_fxp0_alias4="inet 202.0.75.17 netmask 255.255.255.240"
ifconfig_fxp0_alias5="inet 202.0.75.18 netmask 255.255.255.255"
ifconfig_fxp0_alias6="inet 202.0.75.19 netmask 255.255.255.255"
ifconfig_fxp0_alias7="inet 202.0.75.20 netmask 255.255.255.255"

Can now be written as:
ifconfig_fxp0_aliases="inet 10.1.1.2-5/32 inet 202.0.75.17-20/28"

This should be included both in /etc/defaults/rc.conf and in the handbook :)

Thanks and best regards,


/Thomas Steen Rasmussen