Enterasys Networks X-PeditionTM manual Dhcp CLI Commands

DHCP CLI Commands

DHCP CLI Commands

The XSR offers CLI commands to provide the following functionality:

•DHCP Server address pool(s) with related parameters and DHCP options/vendor extensions. You can configure a DHCP address pool with a name that is a symbolic string (e.g., Accounting) with ip dhcp pool. Configuring a DHCP address pool also places you in DHCP pool mode - (config-dhcp-pool)#- from which you can configure pool parameters. The XSR supports adding 1000 network addresses per pool and one DHCP pool per network.

•Create manual bindings of IP addresses and client hardware addresses - Manual bindings are comprised of a:

–host - the DHCP client’s IP address and subnet mask or prefix length, entered with host

–hardware-address- the DHCP client’s MAC address and platform protocol, entered with hardware-address, or

–client-identifier- the DHCP client’s unique marker is its combined media type and MAC address, entered with client-identifier.

•Delete client bindings from the DHCP Server. Clear ip dhcp binding removes an automatic address binding from the DHCP database; no host, no hardware-addressor no client- id remove manual bindings depending on which command was entered first when the binding was created.

•DHCP Server boot file(s) - The boot file is used to store a boot image for the client. The boot image is often the operating system a client uses to load. It is configured with bootfile.

•Enable BOOTP Relay by configuring a destination address for UDP broadcasts with ip helper-address.

•Set domain name and DNS server - To put a client in the general group of networks comprising the domain, use domain-name. To specify the DNS server clients query when they need to correlate host names to IP addresses, use dns-server.

•Specify the NetBIOS server and node type for Microsoft clients - DHCP clients query DNS servers when they must resolve host names to IP addresses; enter an IP address of the NetBIOS MS WINS server using netbios-name-server. The XSR supports four node types of DHCP clients: broadcast, peer-to-peer, mixed, and hybrid. They can be specified using netbios-node-type.

•Configure a default router for the client - After a DHCP client has booted, the client begins sending packets to its default router. The IP address of the default router is required and should be on the same subnet as the client. Set using default-router.

•Configure the address lease time - IP addresses assigned by a DHCP Server have a one-day lease - the interval during which the address is valid. Specify with lease.

•Set the number of ping packets and ping wait interval - the DHCP Server pings an IP address twice before assigning a particular address to a requesting client. If the ping is unanswered, the server assumes (with a high probability) that the address is not in use and assigns the address to the requesting client. Use ip dhcp ping packets to change the number of ping packets the server should send to the IP address before assigning the address.

•Use ip dhcp ping timeout to specify the period the server must wait before timing out a ping request.

•Monitor and maintain DHCP Server services by issuing the following show commands. Show ip dhcp bindings displays bindings data on the DHCP Server including lease expiration dates. Show ip dhcp conflict displays address conflicts found by a DHCP Server when

15-8 Configuring DHCP XSR User’s Guide