Pool independent GI Address
stephan at sanders.koeln
Mon Dec 15 08:57:44 UTC 2014
"Simon Hobson" <dhcp1 at thehobsons.co.uk> wrote:
> Now I am really confused !
> Is 10.10.0.0/16 where the client devices live, or where >Server A
> lives ? From what you wrote earlier it sounded like >the former, this
> >sounds like the latter.
Let me explain the solution.
Each domain is located on a switch/router with a dhcp-relay.
on each domain are two subnets configures (primary and secondary
10.10.1.0/29 primary GI and GW address: 10.10.1.1
10.11.1.0/29 secondary GW address: 10.11.1.1
The dhcp relay allows to use more than one dhcp server but only to
define one GI address.
So for the first server everything is fine. The GI address is within
the pool. But the Backup Server
will receive discovers from the GI 10.10.1.1 and has to offer addresses
from 10.11.1.0/29. Selection of which /29 pool
should be done by option82. option82 will be filled by the dhcp relay
with a string for the remote-id.
> The server will *NOT* try and allocate an address from >anything other
> than 10.10.0.0 because it doesn't have any >addresses in teh other
> >subnets to give out. But it will >know that regardless of whether the
> GI-Addr is in 10.10, >10.11, or 10.20 it can give out addresses in the
> >10.10.0.0 subnet.
Thats the way i want run my configuration.
> Lastly, looking back at your original post, you could help yourself by
> better formatting - with no indentation it's almost impossible to see
> >what's in what scope. Compare these two presentations :
the initial spaces are lost from email translation :-S
Sorry for confusing.
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