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Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Chapter 3: General System Tasks<br />

Modifying the interface configuration<br />

Note: The receive_jumbo_frames option (in the Hardware Capabilities area),<br />

allows the interface to receive larger MTUs. This option is automatically enabled<br />

when you specify a size that is larger than 1500 (standard). You must also ensure<br />

that the destination is able to receive the MTU size when using non-standard sizes.<br />

Important: If you swap interfaces, the MTU settings will not be swapped.<br />

Therefore, if you swap an interface with modified MTU settings, you will need to<br />

reconfigure those settings after swapping the interfaces.<br />

• Hardware Capabilities—This option will only appear if the interface you are<br />

modifying has hardware capabilities that can be configured. To select all <strong>of</strong><br />

the available options, click Select All. To deselect all options, click Deselect<br />

All. The following options may be available for selection:<br />

– rxcsum: Enable transmission <strong>of</strong> checksum <strong>of</strong>fload for IPv4 packets.<br />

– txcsum: Enable reception <strong>of</strong> checksum <strong>of</strong>fload for IPv4 packets.<br />

– tcpseg: Enable TCP/IPv4 segmentation <strong>of</strong>fload for large packets.<br />

When you are finished modifying the interface, click the Save icon to save your<br />

changes. (If you modified the interface in a separate window, you will need to<br />

click OK to return to the Interface Configuration window.)<br />

Configuring VLANs<br />

The VLAN-Enabled Interface Configuration: Modify Interface Configuration<br />

window allows you to create and modify VLANs for an interface. You can<br />

assign up to 64 VLANs/NICs on the <strong>Sidewinder</strong> <strong>G2</strong>. For example, if your<br />

<strong>Sidewinder</strong> <strong>G2</strong> has three NICs, you could configure up to 61 VLANS. Other<br />

information about how VLANs function on <strong>Sidewinder</strong> <strong>G2</strong> include:<br />

• VLANs are supported in a High Availability (HA) configuration. For best<br />

results, configure VLANs before configuring HA.<br />

• You must use a router that can decipher VLAN traffic to use VLANs.<br />

• You cannot create VLANs on an interface that has DHCP enabled.<br />

• To filter traffic for a VLAN, use the following syntax:<br />

tcpdump -pni interface_name vlan vlanID<br />

To configure a VLAN, follow the steps below.<br />

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