Ethernet Support Guide for HP-UX 11i v3

The ixgbe and iocxgbe set the parameter individually for transmit and receive; the icxgbe sets a parameter that

applies to both.

The iether, gelan, igelan, iexgbe, and iocxgbe drivers set interrupt timers individually for transmit and receive.

Restrictions and recommendations concerning modification of this parameter exist for cards using the iether driver;

see Section 3.13 (page 38).

The igelan driver only supports a timer for receive.

3.13 Unsupported parameters of iether driver on HP-UX 11i

For PCI and PCI-X LAN cards that use the iether driver, HP does not recommend changing the

default values of the following four tunables. It has been found that certain combinations of these

tunables (other than the default settings) could result in card hangs.

• send_max_bufs

• recv_max_bufs

• send_coal_ticks

• recv_coal_ticks

These tunables are not supported with PCI-E cards that use the iether driver.

38 Setting and displaying driver Ethernet parameters