First alias in config ignored

[Unixnut]

Hi all, I am having an odd issue.

This is the network specific config in my rc.conf:

ifconfig_em0="up"
ifconfig_em1="up"
ifconfig_em2="up"
ifconfig_em3="up"
cloned_interfaces="lagg0 bridge0 tap0"
ifconfig_lagg0="laggproto loadbalance laggport em0 laggport em1 laggport em2 laggport em3 dhcp"

# Jails
ifconfig_lagg0_alias0="inet 192.168.42.150 netmask 255.255.255.0" 
ifconfig_lagg0_alias1="inet 192.168.42.151 netmask 255.255.255.0" 
ifconfig_lagg0_alias2="inet 192.168.42.152 netmask 255.255.255.0" 
ifconfig_lagg0_alias3="inet 192.168.42.153 netmask 255.255.255.0" 
ifconfig_lagg0_alias4="inet 192.168.42.154 netmask 255.255.255.0" 
ifconfig_lagg0_alias5="inet 192.168.42.155 netmask 255.255.255.0" 
ifconfig_lagg0_alias6="inet 192.168.42.156 netmask 255.255.255.0" 
ifconfig_lagg0_alias7="inet 192.168.42.157 netmask 255.255.255.0" 
ifconfig_lagg0_alias8="inet 192.168.42.158 netmask 255.255.255.0" 
ifconfig_lagg0_alias9="inet 192.168.42.159 netmask 255.255.255.0" 
ifconfig_lagg0_alias10="inet 192.168.42.160 netmask 255.255.255.0" 
ifconfig_lagg0_alias11="inet 192.168.42.161 netmask 255.255.255.0" 
ifconfig_lagg0_alias12="inet 192.168.42.167 netmask 255.255.255.0"

However when I start up networking, all the aliases are added except the first one. In the above case it is 192.168.42.150 that ends up missing. If I put another IP address as alias0 it vanishes instead.

I tried just starting from "alias1" thinking perhaps "alias0" isn't valid, however the same issue persists. Always the first entry in my list is missing.

If I try to add the following line at the end:

ifconfig_lagg0_alias13="inet 192.168.42.150 netmask 255.255.255.0"

Then 192.168.42.150 does appear in the list of aliases, but then the second in the list (alias1) vanishes. This is odd. It is as if I only have 11 fixed aliases available on an interface, and any additional aliases pop an alias off the other end.

However I can't think FreeBSD deliberately restricts aliases to 11 per interface, so I wanted to ask if I am doing something wrong with my config?

 

[SirDice]

Are you aware you can use a different way to configure lots of IP addresses?

ipv4_addrs_lagg0="192.168.42.150-161/24 192.168.42.167/24"

 

[Unixnut]

Are you aware you can use a different way to configure lots of IP addresses?

ipv4_addrs_lagg0="192.168.42.150-161/24 192.168.42.167/24"

No I wasn't, the addresses are however handled by a script so I don't manually add each line. The config also contains information about each jail on each line, which I removed for clarity.

I could make changes to the system to define a range, but then I would have to change the system and handle the range manually (plus more logic to detect whether an IP address is already assigned, currently I just grep rc.conf to check). Is that the only way to have more than 11 aliases per interface?

 

[SirDice]

The config also contains information about each jail on each line

You don't need to 'reserve' the IP addresses of a jail. The address will be automatically added to the interface when the jail starts and removed when it's stopped.

 

[Unixnut]

You don't need to 'reserve' the IP addresses of a jail. The address will be automatically added to the interface when the jail starts and removed when it's stopped.

I may not "need to" reserve the IP addresses as far as FreeBSD is concerned, however that is how this existing system of jail management works and re-writing it is not the current intention.

My question is simply about why the first alias vanishes. To all intents and purposes this looks like a bug to me, but perhaps it is a known limitation? Or I am doing something wrong with the configuration?