164 | Dynamic Host Configuration Protocol (DHCP)
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After an IP address is leased to a client, only that client may release the address. FTOS performs a IP +
MAC source address validation to ensure that no client can release another clients address. This is a default
behavior, and is separate from IP+MAC source address validation. For more information, refer to IP+MAC
Source Address Validation on page 185.
Exclude Addresses from the Address Pool
The DHCP server assumes that all IP addresses in a DHCP address pool are available for assigning to
DHCP clients. You must specify the IP address that the DHCP server should not assign to clients.
Specify an Address Lease Time
Specify a Default Gateway
The IP address of the default router must be on the same subnet as the client. To specify the default
gateway:
3 Specify the range of IP addresses from which the
DHCP server may assign addresses.
•
network is the subnet address.
•
prefix-length specifies the number of bits
used for the network portion of the address
you specify.
network network /prefix-length
Prefix-length Range: 17 to 31
DHCP <POOL>
4 Display the current pool configuration.
show config
DHCP <POOL>
Task Command Syntax Command Mode
Exclude an address range from DHCP assignment. The
exclusion applies to all configured pools.
excluded-address
DHCP
Task Command Syntax Command Mode
Specify an address lease time for the addresses in
a pool.
lease {days [hours] [minutes] | infinite}
Default: 24 hours
DHCP <POOL>
Task Command Syntax Command Mode
Specify default gateway(s) for the clients on the subnet, in
order of preference.
default-router address
DHCP <POOL>
Step Task Command Syntax Command Mode
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