net.inet.carp.preempt

M

muzinim

It is my understanding that if I enable net.inet.carp.preempt, when one carp interface on the master goes down, all carp interfaces should also go down but I am not finding this to be true. When I down either interface on the master, the other interface continues to be master. My configuration is as follows:

Master:

Code: 
cloned_interfaces="carp0 carp1"
ifconfig_carp0="vhid 1 pass <password> 165.196.25.108/25"
ifconfig_carp1="vhid 2 pass <password> 165.196.14.26/24"
Backup:

Code: 
cloned_interfaces="carp0 carp1"
ifconfig_carp0="vhid 1 advskew 100 pass <password> 165.196.25.108/25"
ifconfig_carp1="vhid 2 advskew 100 pass <password> 165.196.14.26/24"

This is what the ifconfig output on the master looks like after I down one of the interfaces:

Code: 
carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
	inet 165.196.25.108 netmask 0xffffff80 
	carp: MASTER vhid 1 advbase 1 advskew 0
carp1: flags=8<LOOPBACK> metric 0 mtu 1500
	inet 165.196.14.26 netmask 0xffffff00 
	carp: INIT vhid 2 advbase 1 advskew 0

And the output of sysctl:

Code: 
sysctl -a | grep "net.inet.carp"
net.inet.carp.allow: 1
net.inet.carp.preempt: 1
net.inet.carp.log: 1
net.inet.carp.arpbalance: 0
net.inet.carp.suppress_preempt: 0
 
muzinim said:
When I down either interface on the master
Click to expand...

How do you do that? You need to take down physical interface, not carp itself.

I'm not sure, but maybe it's necessary for the interface to actually lost link, # ifconfig [i]device[/i] down is not enough. But I cannot confirm that now.
 
You are correct. When I unplugged the cable from the NIC, all interfaces failed over. Thank you for the response.
 
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