Failover peer outside pools?
nicolas at ecarnot.net
Thu Nov 5 09:44:25 UTC 2015
All our subnets are behind routers that have ip helpers, redirecting
DHCP requests towards 2 dhcp servers in failover peers (we have around
10 DHCP servers in couples).
In our setup, I just noticed that amongst our hundreds of
shared-networks using failover peers, some subnets have a strange
I saw that in some rare cases, we have some subnets with *no* pool, thus
*no* failover setup, where there's just one static reservation declared,
and it is working.
But I was wondering how it goes?
- when the host is requesting some DHCP traffic, it is broadcasted via
the router towards 2 DHCP server that have no idea about what the other
did some hours ago in this subnet
- as the only request is about a static ip, I guess any of both server
is answering correctly, but not telling the other.
So I'm embarrassed that the router is broadcasting the DHCP traffic to 2
servers that don't talk (about this particular subnet - there are
chatting about others).
The documentation seems to imply that failover definition lies only
I could create a pool just to add failover context, but the same doc
also states that static reservation should stay outside pools.
Am I missing something?
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