Check For Address Conflicts - Dell Force10 C150 Configuration Manual

To create a manual binding:
Step Task
1 Create an address pool
2 Specify the client IP address.
3 Specify the client hardware address or
client-identifier.
•
hardware-address
MAC address.
is the protocol of the hardware
type
platform. The default protocol is
Ethernet.
is required for
client-identifier
Microsoft clients instead of a hardware
addresses. The client identifier is
formed by concatenating the media
type and the MAC address of the client.
Refer to the "Address Resolution
Protocol Parameters" section of RFC
1700—Assigned Numbers, for a list of
media type codes.

Check for Address Conflicts

By default, the DHCP server pings an address from the pool twice before assigning the address to a client
to attempt to verify that it is not in use. If the ping is unanswered, the DHCP server assumes that the
address is not in use and assigns the address. By default, the DHCP server waits 500 milliseconds before
timing out a ping packet.
Task
Specify the number of ping packets the DHCP server sends
to the pool address before assigning the address.
Change the amount of time the server waits for a ping reply
before considering the ping a failure.
An address conflict occurs when two hosts use the same IP address. The server checks for a conflict using
ping and the client checks for conflict using gratuitous ARP. If a conflict is detected, the address is
removed from the pool. The address will not be assigned until the administrator resolves the conflict.
Task
Log IP address conflicts.
Command Syntax
pool name
host address
hardware-address hardware-address type
client-identifier unique-identifier
is the client
Command Syntax
ip dhcp conflict logging
Command Syntax
ip dhcp ping packets number
Default: 2
ip dhcp ping timeout milliseconds
Default: 500 milliseconds
Dynamic Host Configuration Protocol | 319
Command Mode
DHCP
DHCP <POOL>
DHCP <POOL>
Command Mode
CONFIGURATION
CONFIGURATION
Command Mode
CONFIGURATION