On 2/8/22 14:12, David Ramsey wrote:
Lab testing I've done shows that the Active/Standby HA configuration
works well if one or the other DHCP servers fails completely.
Automatic takeover and recovery work nicely.
If an Active/Standby HA implementation were to go "split brain" with
core network severed between DHCP servers, however, both would go
active and the lease DBs would no longer be in sync.
How to recover from that when the network is restored? I know there
are a ton of variables involved - lease times, how long network was
segmented, # subscribers, etc.... but I am wrestling with what would
be the optimal approach/logic to consolidate and recover ?
Help?
Thanks folks, --David
The admin docs[0] do a fairly decent job of explaining how HA failover
situations are recovered from. The amount of time it takes is directly
related to the dhcp statemachine timers, which are influenced by your
settings.
0:
https://kea.readthedocs.io/en/kea-2.1.2/arm/hooks.html#scope-transition-in-a-partner-down-case
Chad
--
Chad Catlett
[email protected]
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