Juniper Networks J-Series manual Verifying Dhcp Server Operation

Chapter 4: Configuring the Router as a DHCP Server

IP Address	Hardware Address		Type	Lease expires at
192.168.2.2	02:04:06:08:0A:0C		dynamic	2005-02-07 8:48:59 PDT
192.168.2.50	01:03:05:07:09:0B		static	never
user@host> show system services dhcp binding 192.168.2.2 detail
IP address		192.168.2.2
Hardware	address	02:04:06:08:0A:0C
Pool		192.168.2.0/24
Request received on		fe-0/0/0
Lease information:
Type		DHCP
Obtained	at	2005-01-24 8:48:59 PDT
Expires at		2005-02-07 8:48:59 PDT
State		active

DHCP options:

Name: domain-name, Value: mycompany.net mylab.net

Name: name-server, Value: 192.168.10.2

Code: 16, Type: ip-address, Value: 192.168.2.33

user@host> show system services dhcp conflict

Meaning Verify the following information:

■For each dynamic binding, verify that the IP address is within the range of the configured IP address pool. Under Lease Expires, verify that the difference between the date and time when the lease expires and the current date and time is less than the maximum configured lease time.

■For each static binding, verify that the IP address corresponds to the MAC address displayed under Hardware Address (as defined in the static-bindingstatement in the configuration). Under Lease Expires, verify that the lease expiration is never.

■In the output displayed by the show system services dhcp binding ip-addressdetail command, verify that the options under DHCP options are correct for the subnet.

■Verify that the show system services dhcp conflict command does not display any conflicts.

Related Topics For complete descriptions of show system services dhcp binding and show system services dhcp conflict commands and output, see the JUNOS System Basics and Services Command Reference.

Verifying DHCP Server Operation

Purpose Verify that the DHCP server is operating as configured.

Action Take the following actions:

■Use the ping command to verify that a client responds to ping packets containing the destination IP address assigned by the Services Router.

■Display the IP configuration on the client. For example, on a PC running Microsoft Windows, enter ipconfig /all at the command prompt to display the PC's IP configuration.

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