09-26-2017 11:57 PM
Would you effectively have double the performance in terms of LPS when you setup DHCP failover? For example, would a 1420 with a 300 LPS yeild 600 LPS when setup for DHCP failover with another 1420?
Solved! Go to Solution.
09-27-2017 09:23 PM
Not necessarily, DHCP Failover is a configuration to increase reliability and ensure availability in case one server is not reachable.As part of configuration, we are adding IP helpers to both the servers and they in turn process all the DHCP requests that originate in the subnet either in standalone and n FO configuration.
If you are concerned about the LPS I would suggest to split the DHCP scope based on the traffic and assign to both servers rather than in an FO configuration.
Hope this helps.
10-04-2017 04:02 PM
Thanks Syan for the response. I queried because I know both DHCP servers in FO will process the traffic but only one actually responds and continues to process the client request and send the offer, so assumed the standby is not impacted much. My question is for sizing purposes as queried by a client. I agree splitting the scope is a good option for increased performance especially if client numbers are less than 50% of the total scope size.
10-04-2017 04:08 PM
Just to clarify, together the dhcp peers can handle higher than 300 lps in the given example but definitely not 600 lps. The peers has to process discovers but it's spared of the laod from subsequent process in DORA.