Re: Loosing alias IPs

Buki wrote:
On Mon, Aug 20, 2007 at 10:34:49AM -0700, Doug Barton wrote:
FYI, this isn't really a question for -isp, freebsd-questions@xxxxxxxxxxx would have been a better choice.

On Sun, 19 Aug 2007, Pavlos Georgiadis wrote:

Hello,

I have a FreeBSD 6.2 server that get's his IP address from DHCP
(although this IP is static). I have also configured 3 more alias IP
addresses.

My problem is that anytime the DHCP lease is renewed (with the same IP
address always), one of the 3 aliases is lost.

Is this a bug? Or am I doing something wrong?

My setup is as follows:

the IP address that the server gets by DHCP is X.X.139.45

rc.conf
ifconfig_em0="DHCP"
ifconfig_em0_alias0="inet X.X.141.113 netmask 0xfffff000"
ifconfig_em0_alias1="inet X.X.142.124 netmask 0xfffff000"
ifconfig_em0_alias2="inet X.X.142.128 netmask 0xfffff000"
You probably want to do this either in dhclient.conf or in a dhclient-exit-hooks script. Check the man pages to get an idea of how to go about this, and ask on -questions if you need more help.

Also, aliased Ip addresses must be configured with netmask /32


This is only true if the IP aliases are in the same network as the first IP address. The following would be a valid configuration:

ifconfig_em0="inet 192.168.0.1/24"
ifconfig_em0_alias0="inet 192.168.0.2/32"
ifconfig_em0_alias1="inet 192.168.1.1/24"
ifconfig_em0_alias2="inet 192.168.1.2/32"


Tom
Good luck,

Doug

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Buki

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