How to Specify Parameter Values Using the ndd Utility

This section describes how to modify and display parameter values using the ndd utility.

Before you use the ndd utility to get or set a parameter for a hxge device, you must specify the device instance for the utility.

1. Use the ifconfig command to identify the instance associated with hxge device.

   # ifconfig -a
   hxge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
   inet 192.168.1.29 netmask ffffff00 broadcast 192.168.1.255
   ether 0:14:4f:62:1:3

2. List all of the parameters supported by the hxge driver.

   # ndd -get /dev/hxge0 ?
   ?                             (read only)instance                      (read only)
   rxdma_intr_time               (read and write)
   rxdma_intr_pkts               (read and write)
   class_opt_ipv4_tcp            (read and write)
   class_opt_ipv4_udp            (read and write)
   class_opt_ipv4_ah             (read and write)
   class_opt_ipv4_sctp           (read and write)
   class_opt_ipv6_tcp            (read and write)
   class_opt_ipv6_udp            (read and write)
   class_opt_ipv6_ah             (read and write)
   class_opt_ipv6_sctp           (read and write)
    

   Note that read only parameters cannot be changed.

3. Display the value of a parameter.

   The following is an example for the rxdma_intr_time parameter:

   # ndd -get /dev/hxge0 rxdma_intr_time
   8

4. Modify the value of a parameter.

   The following is an example for the rxdma_intr_time parameter. It changes the rxdma_intr_time parameter from 0x8 to 0x10:

   # ndd -set /dev/hxge0 rxdma_intr_time 0x10
   # ndd -get /dev/hxge0 rxdma_intr_time
   10