Allied Telesis AT-2973T User Manual

AT-2973SX, AT-2973T, and AT-2973T/4 NetExtreme II Family Adapters Installation and User’s Guide

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Broadcom validation is limited to a power of 2; for example, 16, 32, 
or 128. 

event_coal_div 

The Event Coalescing Divide Factor parameter is a performance tuning 
parameter used to moderate the rate of interrupt generation by the iscsi 
firmware. 

Defaults: 1 

Valid values: 1, 2, 4, 8 

bnx2i_nopout_when_commands_active 

The "iSCSI NOOP even when connection is not idle" parameter enables 
the offload initiator to send iSCSI NOP-OUT on wire even when the link is 
not truly idle. This parameter was introduced to avoid unnecessary 
session recoveries induced by some older targets when iSCSI NOP-OUT 
and iSCSI CMD pdus are intermixed. Newer iSCSI target systems are 
immune to this condition and this parameter is turned ON for quite some 
time. 

Defaults: 1 

Values: Binary parameter, 0/1 

The parameters can also be set in the modprobe.conf command. See 
the man page for more information. 

The bnx2 driver defaults to the following settings:

Speed: Autonegotiation with all speeds advertised 

Flow Control: Autonegotiation with RX and TX advertised 

MTU: 1500 (range is 46–9000) 

RX Ring Size: 255 (range is 0–4080) 

RX Jumbo Ring Size: 0 (range 0–16320) adjusted by the driver based on 
MTU and RX Ring Size 

TX Ring Size: 255 (range is (MAX_SKB_FRAGS+1)–255). 
MAX_SKB_FRAGS varies on different kernels and different architectures. 
On a 2.6 kernel for x86, MAX_SKB_FRAGS is 18. 

Coalesce RX Microseconds: 18 (range is 0–1023) 

Coalesce RX Microseconds IRQ: 18 (range is 0–1023)