CARP forcing failover

[Freddie Cash]

Do you have the preemption sysctl enabled? That will fail-over all carp
interfaces when any one fails.

"sysctl -a | grep carp"

I'm pretty sure there's also an ifconfig command to force the state as
either master or backup. Check the man page.


On Feb 28, 2017 5:01 PM, "Aristedes Maniatis" <ari at ish.com.au> wrote:

> I have a pair network gateway boxes running FreeBSD 11 and pf. Upstream
> runs VRRP to provide redundant links, one to each gateway. Internally I'm
> using CARP for failover.
>
> All works well, but I find that manually failing over the link is a bit
> complicated. In short I have this:
>
> em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         media: Ethernet autoselect (100baseTX <full-duplex>)
>         status: active
>         carp: BACKUP vhid 1 advbase 1 advskew 50
> igb0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         media: Ethernet autoselect (1000baseT <full-duplex>)
>         status: active
>         carp: BACKUP vhid 2 advbase 1 advskew 50
> igb0.2: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
> 0 mtu 1500
>         status: active
>         vlan: 2 vlanpcp: 0 parent interface: igb0
>         carp: BACKUP vhid 3 advbase 1 advskew 50
>         groups: vlan
>
> That's two internal vlans and one external network. Each interface has its
> own vhid since that's the advice I had in the past.
>
> Now, what command can I type that I could run remotely (SSH over the em0
> link) to force all the CARP addresses simultaneously to decrease the
> advskew and become MASTER. Alternatively I could run something on the
> MASTER to make it BACKUP. Everything I've done so far is one command per
> interface which has got me in trouble before as I manage to accidentally
> remove my own access to the box before I'm done.
>
> Cheers
> Ari
>
> please cc me.
>
> --
> -------------------------->
> Aristedes Maniatis
> CEO, ish
> https://www.ish.com.au
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>
>