Max num of static entries

loganathan Govindaraj loganosc at
Mon Aug 16 14:47:57 UTC 2010

thanks max , we are assigning the ip address based on client class
identifier which is not the mac


On Mon, Aug 16, 2010 at 7:55 PM, Marc Perea <marccp at> wrote:

>  Hi loganathan,
> How are you assigning the static addresses? From a pool of one IP per
> client, or with the fixed-address statement tied to some host entry? (i.e.
> class based or host based matching) We currently have over 13,000+ static
> host entries in production and dhcpd restarts in under a second whi en
> taking config changes and operates perfectly. As an added bonus, static
> assignment allows us to duplicate the config to N servers for redundancy
> without having to run any failover protocols.
> On the other hand, we used to do class based matching and a pool of one IP
> per client, and things were very painful. dhcpd would take over a minute to
> restart and accept config changes, and would also have exceptionally poor
> performance (<5 DORA/s processing).
> I don't know if there's a cap, but if there is it is easily higher than 13k
> and change. I suspect the only limitation is your system memory.
> As the standard warning I've heard in the past, if you decide to match on
> something like MAC to assign these static IPs, beware of spoofing and be
> aware that this is by no means securing the network.
> --Marc
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the dhcp-users mailing list