| no one 2003-11-26, 2:23 pm |
| Let's say you set up a network printer with an internal
print server. When you first put it online, it will pick
up a dynamically assigned address from DHCP. Generally,
when I designate a DHCP pool of assignable addresses, I
exclude the first 20 or 25 for static assignments
(servers, print servers, routers, etc). But I forgot to
statically assign the one for the new network printer.
So I would set up an exclusion for that IP address in my
address range so DHCP would not assign it to another
client. This effectively created an "exclusion" for that
IP address. Alternatively, I could have gone in and
statically assigned the print server an IP address in the
range below 20 or 25. A "REAL" reservation would be set
up if you set up your assignable addresses as x.y.z.1-
254/24 and then create reservations for x.y.z.1-25. Same
difference. You have defined the entire class c address
as an assignable pool and then reserved the first 25 for
static assignment. An exclusion is used when you want to
exclude an address within the assignable pool for
instances like the network printer above. Clear as mud?
>-----Original Message-----
>
>I understand that you create an Exclusion Range in DHCP
>for say Static addresses or to exclude other subnet
>addresses from dynamically being assigned.
>But when or why do you create Reservations in DHCP to
>reserve what ??
>And when do you know which one to use??
>
>.
>
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