Option 82 fast change
Niall O'Reilly
Niall.oReilly at ucd.ie
Thu Sep 11 16:36:32 UTC 2008
On Thu, 11 Sep 2008 15:41:04 +0100, Anders Rosendal <anders at rosendal.nu>
wrote:
> Then we are at least three.
> Have a public network where customers are assigned one "static ip"
> through dhcp, and when they change equipment on there ports they don't
> get the IP for the "new" equipment.
> Would like to see some kind of leasetime-override.
Be careful what you wish for.
Over-riding leases is likely to be a source of problems.
Can you depend on the customer to set the Client ID of the
equipment to a site-specific string chosen by you? This may
be an immediate work-around, as the ISC DHCP server (IIUC)
heeds a Client-ID string in preference to a MAC Address.
IIRC, there has been some discussion on this list about the
desirability of a configuration option to force the MAC address
(rather than the Client ID string) to be the key for the lease.
If this idea reaches the top of the work-list, it might be
useful to consider providing an additional flavour of this
option which would allow the lease key to be derived from
Option-82 data.
Best regards,
Niall O'Reilly
University College Dublin IT Services
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