SMC Networks SMC6724L3 Instrukcja Użytkownika Pobierz pdf (Strona 105)

D

YNAMIC

H

OST

C

ONFIGURATION

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ROTOCOL

3-57

Configuring Address Pools

You must configure IP address pools for each IP interface that will provide

addresses to attached clients via the DHCP server.

Command Usage

• First configure address pools for the network interfaces. Then you can

manually bind an address to a specific client if required. However, note

that any static host address must fall within the range of an existing

network address pool. You can configure up to 8 network address pools,

and up to 32 manually bound host address pools (i.e., one address per

host pool).

• When a client request is received, the switch first checks for a network

address pool matching the gateway where the request originated (i.e., if

the request was forwarded by a relay server). If there is no gateway in the

client request (i.e., the request was not forwarded by a relay server), the

switch searches for a network pool matching the interface through which

the client request was received. It then searches for a manually configured

host address that falls within the matching network pool. If no manually

configured host address is found, it assigns an address from the matching

network address pool. However, if no matching address pool is found the

request is ignored.

• When searching for a manual binding, the switch compares the client

identifier and then the hardware address for DHCP clients. Since

BOOTP clients cannot transmit a client identifier, you must configure a

hardware address for this host type. If no manual binding has been

specified for a host entry with a hardware address or client identifier, the

switch will assign an address from the first matching network pool.

• If the subnet mask is not specified for network or host address pools, the

class A, B, or C natural mask is used (see page 3-178). The DHCP server

assumes that all host addresses are available. You can exclude subsets of

the address space by using the IP Excluded Address field on the DHCP

Server General configuration page.

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