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Using Broadcom Advanced Control Suite 4: Broadcom NetXtreme II® Network Adapter User Guide

file:///C|/Users/Nalina_N_S/Documents/NetXtremeII/English/bacs.htm[9/5/2014 3:45:16 PM]

TCP Offload Engine (TOE) for accelerating TCP over 1 GbE and 10 GbE.
Internet Small Computer Systems Interface (iSCSI) offload for accelerating network storage access featuring centralized boot
functionality (iSCSI boot).

You can also view the number of unlicensed resources and unallocated resources.

TOE and iSCSI can only be configured on certain adapters and require a license key. License keys are installed on the motherboard
for use with LOMs and are preprogrammed in add-in NICs. TOE is a technology best suited for long-term TCP connections. TOE used
in conjunction with applications that primarily deal with short-term connections may see suboptimal performance when compared to
not using TOE. A short-term connection is a TCP connection that is established for only a few seconds at most, often less than one
second. The overhead of establishing and tearing down the TCP connection with short-term connections may diminish the benefit
that TOE provides. An example of an application that uses short-term connections is a web server that is not behind a load balancer.
TCP connections for HTTP sessions are very short-lived and last only long enough to serve up a web page, after which the TCP
connection is terminated. On the other hand, the same web server behind a load balancer benefits greatly from TOE since the TCP
connections are long-lived between the web server and the load balancer. In contrast, a backup application is very likely to benefit
from TOE since backup applications establish long-term connections between the server and the client.

To view resource reservations

1. Click the name of the Broadcom NetXtreme II system device in the Explorer View pane.
2. From the

Resource Reservations

section, select

the property you want to set.

3. Click

Apply

to confirm the changes to all properties. Click

Reset

to return the properties to their original values.

To configure resource reservations

1. Select

Reserved Resources

for the Offload Configuration setting. Reservations allocate the minimum number of connections

per technology. See

Table 1

for the maximum number of connections available for various configurations.

2. Click

First Come First Served

to allow connections on a first-come-first-served basis to any enabled offload technology (TOE

or iSCSI) as long as resources are available. Otherwise, click

Reserved Resources

to set the maximum number of

connections for each offload technology. This option is not available for 10 Gbps network adapters.

3. If allocating TOE connections, select the

TCP Offload Engine (TOE)

check box and slide the bar or enter a number in the

value box. This is the maximum number of connections available for TOE offload.

4. If allocating iSCSI connections, select the

iSCSI

check box and slide the bar or enter a number in the value box. This is the

maximum number of connections available for iSCSI offload.

5. After the configurations are complete, click

Apply

to save the settings or click

Reset

to revert back to the previous settings.

A chart of the resource allocations appears below the resource configurations.

6. If prompted, reboot the system.

Table 1: Maximum Number of Offload Connections

Offload

First Come First Served Reserved Resources Maximum Number of Connections

TOE only

Selected

–

1024

TOE only

–

Selected

864

iSCSI only Selected

–

Between 7 and 100

iSCSI only –

Selected

Configuring the IP Address for iSCSI Offload

For iSCSI-booted adapters, the Configurations tab is not available and you will not be able to perform this procedure.

To set the IP address of the iSCSI HBA for iSCSI offload

The

iSCSI Management

section of the

Configurations

tab allows you to set the IP address of the iSCSI HBA when using iSCSI

protocol to offload network processing from the CPU to the Broadcom network adapter.

1. Click the name of the Broadcom NetXtreme II iSCSI device in the SCSI controller section of the Explorer View pane.
2. Depending on the protocol you will be using, for

IPv4 DHCP

IPv6 DHCP

, select

Enable

(not available for iSCSI booted

adapters) to set the IP address dynamically using a DHCP server. Or select

Disable

to set the IP address using a static IP

address. Enter the

IP Address

Subnet Mask

, and