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Basic Configuration
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CLI – Enter the following command to restart DHCP service.
Enabling Jumbo Frames
The switch provides more efficient throughput for large sequential data transfers by
supporting jumbo frames up to 9000 bytes. Compared to standard Ethernet frames
that run only up to 1.5 KB, using jumbo frames significantly reduces the per-packet
overhead required to process protocol encapsulation fields.
To use jumbo frames, both the source and destination end nodes (such as a
computer or server) must support this feature. Also, when the connection is
operating at full duplex, all switches in the network between the two end nodes must
be able to accept the extended frame size. And for half-duplex connections, all
devices in the collision domain would need to support jumbo frames.
Enabling jumbo frames limits the maximum threshold for broadcast storm control to
64 packets per second.
Command Attributes
Jumbo Packet Status – Enables or disables support for jumbo frames.
Web – Click System, Jumbo Frame Configuration. Check the box and click Apply
Changes to enable jumbo frame support.
Figure 3-10. Enabling Jumbo Frame Support
CLI – In global configuration mode enter jumbo-frame to enable jumbo frame
support.
Managing Firmware
You can upload/download firmware to or from a TFTP server. By saving runtime
code to a file on a TFTP server, that file can later be downloaded to the switch to
restore operation. You can set the switch to use new firmware without overwriting
the previous version.
Command Attributes
• TFTP Server IP Address – The IP address of a TFTP server.
Console#ip dhcp restart client 4-121
Console#
Console(config)#jumbo-frame 4-61
Console(config)#