Enterasys Networks X-PeditionTM manual Bootp Client Support Example, Dhcp Option Examples

DHCP Server Configuration Examples

The domain name for this host is specified as indusriver.com (this will override enterasys.com specified for this pool, and ent.com specified for the class).

XSR(config)#ip local pool dpool 1.1.1.0/24

XSR(config)#ip dhcp pool dpool

XSR(config-dhcp-pool)#domain-name enterasys.com

XSR(config-dhcp-pool)#client-class engineering

XSR(config-dhcp-class)#domain-name ent.com

XSR(config-dhcp-class)#hardware-address 00f0.1211.22a1

XSR(config-dhcp-host)#host 1.1.1.20 255.255.255.0

XSR(config-dhcp-host)#domain-name indusriver.com

BOOTP Client Support Example

In the following example, the XSR is configured to support a BOOTP client to download an image file from a TFTP server. Configured within the DHCP pool BOOTPdownload, the client is assigned a manual binding of host IP and hardware addresses (or optionally, its client-id), the TFTP server’s IP address, and the name of the file to be downloaded, acme.hex. Also, a static ARP entry is set.

XSR(config)#ip dhcp pool BOOTPdownload

XSR(config-dhcp-pool)#host 192.168.1.33 255.255.255.0

XSR(config-dhcp-pool)#next-server 192.168.1.234

XSR(config-dhcp-pool)#bootfile acme.hex

XSR(config-dhcp-pool)#hardware-address 0000.1d11.e829

XSR(config)#arp 192.168.1.33 0000.1D11.E829

When the MAC address 0000.1d11.e829 (BOOTP client) transmits a BOOTP request, the DHCP server will respond with the IP address 192.168.1.33, the boot file name acme.hex and the next- server IP address 192.168.1.234.

DHCP Option Examples

The following sample DHCP option configurations illustrate the three types of option values prompted for by the CLI: IP address, ASCII and hex. See the XSR CLI Reference Guide for more.

The following example configures DHCP option 3, which lists the IP addresses of four default routers on the DHCP client's subnet in descending order of preference. This setting can also be configured by the DHCP default-routercommand. Be sure to first exclude these addresses from the IP local pool to prevent them from being allocated by the DHCP server.

XSR(config-dhcp-pool)#option 3 ip 192.168.57.90 192.168.57.26 192.168.57.54 192.168.57.78

The following example configures DHCP option 12, which specifies the host name of a client which may or may not be qualified with the local domain name. The option parameter is expressed in ASCII text but can also be configured by the DHCP client-namecommand. The name should not include the domain name.

XSR(config-dhcp-host)#option 12 ascii jonah

The following example configures DHCP option 29, which specifies that the client will perform subnet mask discovery using ICMP.

XSR(config-dhcp-host)#option 29 hex 01

15-12 Configuring DHCP XSR User’s Guide