Fail over serves on different VLANS

S Ca sjcarr at
Thu Jan 14 15:45:26 UTC 2016

On 14 January 2016 at 12:18, Klaus Vink Slott <gqv604 at> wrote:
> How does the server "see if the other server makes an offer". Do they need
> to bee on the same VLAN or is it communicated directly between the servers?

The client broadcasts it's DHCPREQUEST in which it states which server
it has chosen, those packets are then forwarded by the IP helpers to
both DHCP failover peers.

DHCP failover doesn't need both peers to be in the same VLAN, the only
requirement is that the IP helper sends to both peers simultaneously.


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