the reason why the second one works, is because the order does matter.
you need to configure the device's interesting bits, before you start
assigning an IP address to it.
On 2014 Aug 19 (Tue) at 19:31:36 -0400 (-0400), Stefan Olsson wrote:
:I've pinpointed the issue with my carp setup. Finally!
:
:It seems like the order of things in hostname.carp0 matters more than
:I thought it did.?
:
:This doesn't work so well:
:# cat /etc/hostname.carp0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
:inet 192.168.16.1/24??
:vhid 100 pass blahblah advbase 5 advskew 0
:
:
:This works however:
:# cat /etc/hostname.carp0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
:vhid 100 pass blahblah advbase 5 advskew 0
:inet 192.168.16.1/24 ??
:
:
:
:Both result in exactly this:
:# ifconfig carp0
:carp0: flags=28843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,NOINET6> mtu 1500
:? ? ? ? lladdr 00:00:5e:00:01:64
:? ? ? ? priority: 0
:? ? ? ? carp: MASTER carpdev em0 vhid 100 advbase 5 advskew 0
:? ? ? ? groups: carp
:? ? ? ? status: master
:? ? ? ??inet 192.168.16.1 netmask 0xffffff00 broadcast 192.168.16.255
:
:
:----
:-The difference is that with the latter order, carp becomes "muted". Although
ip-traffic?
:and arp passes through fine, there is no sign of carp when I do tcpdump on
em0. If
:the vhid is added before the ip-address however, carp works as expected and
tcpdump can capture
:the carp-advertisements going out on em0.?
:
:-It would be nice if someone with more insight could explain in detail why the
second
:order in hostname.carp0 doesn't work.?
:-I am aware that I could have had it all in one line, but because of
readability etc
:I chose to split it into two lines.?
:
--
The sooner all the animals are dead, the sooner we'll find their money.
-- Ed Bluestone, "The National Lampoon"
