Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 92)

74 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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Configuring IP parameters – Layer 3 Switches
Removing DHCP leases
The clear ip dhcp-server binding command can be used to delete a specific lease, or all lease
entries from the lease binding database.
Brocade(config)# clear ip dhcp-server binding *
Syntax: clear ip dhcp-server binding [address | *]
• address - The IP address to be deleted
• * - Clears all IP addresses
Enabling DHCP Server
The ip dhcp-server enable command enables DHCP Server, which is disabled by default.
Syntax: [no] ip dhcp-server enable
The no version of this command disables DHCP Server.
Disabling DHCP Server on the management port
By default, when DHCP Server is enabled, it responds to DHCP client requests received on the
management port. If desired, you can prevent the response to DHCP client requests received on
the management port, by disabling DHCP Server support on the port. When disabled, DHCP client
requests that are received on the management port are silently discarded.
To disable DHCP Server on the management port, enter the following command at the global
configuration level of the CLI.
Brocade(config)# no ip dhcp-server mgmt
To re-enable DHCP Server on the management port after it has been disabled, enter the ip
dhcp-server mgmt command:
Brocade(config)# ip dhcp-server mgmt
Syntax: [no] ip dhcp-server mgmt
Setting the wait time for ARP-ping response
At startup, the server reconciles the lease-binding database by sending an ARP-ping packet out to
every client. If there is no response to the ARP-ping packet within a set amount of time (set in
seconds), the server deletes the client from the lease-binding database. The minimum setting is 5
seconds and the maximum is 30 seconds.
Syntax: ip dhcp-server arp-ping-timeout num
• num - The number of seconds to wait for a response to an ARP-ping packet.
NOTE
Do not alter the default value unless it is necessary. Increasing the value of this timer may increase
the time to get console access after a reboot.