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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
210
14-9 ip dhcp excluded-address
This command is used to define some IP addresses and make the DHCP server not assign them to the DHCP client in
the global configuration mode. The no form of this command can be used to cancel this definition.
ip dhcp excluded-address [vrf vrf-name] low-ip-address [high-ip-address]
no ip dhcp excluded-address [vrf vrf-name] low-ip-address [high-ip-address]
Parameters
14-10 ip dhcp ping packet
This command is used to configure the times of pinging the IP address when the DHCP server detects address conflict
in the global configuration mode. The no form of this command is used to restore it to the default configuration.
ip dhcp ping packet [number]
no ip dhcp ping packet
Parameters
vrf vrf-name (Optional) Excludes IP addresses from a virtual routing and forwarding (VRF) space.
low-ip-address Specifies to exclude the IP address, or exclude the start IP address within the range
of the IP address.
high-ip-address Specifies to exclude the end IP address within the range of the IP address.
Default
No excluded address is defined.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 8
Usage Guideline
If the excluded IP address is not configured, the DHCP server attempts to assign all
IP addresses in the DHCP address pool. This command can reserve some IP
addresses for specific hosts to prevent these addresses are assigned to the DHCP
client, and define the excluded IP address accurately to reduce the conflict detecting
time when the DHCP server assigns the address.
Example
In the configuration example below, the DHCP server will not attempt to assign the
IP addresses within 192.168.12.100~150.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#ip dhcp excluded-address vrf vrf1 192.168.12.100 192.168.12.150
DXS-3600-32S(config)#
number (Optional) Specifies the number of packets in the range of 0 to 10, where 0 indicates
disabling the ping operation. The Ping operation sends two packets by default.
Default
The Ping operation sends two packets by default.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 8
Usage Guideline
When the DHCP server attempts to assign the IP address from the DHCP address
pool, use the ping operation to check whether this address is occupied by other
hosts. Record it if the address is occupied, otherwise, assign it to the DHCP client.
The Ping operation will send up to 10 packets, two packets by default.
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