3Com IntelliJack NJ225FX, Руководство пользователя

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Changing Device Configuration 61
With Data Rate Control settings, you can reduce the network traffic speed on the
IntelliJack to as little as 128 Kbps. This can be useful if the machine is in a public
area where you only want to provide a minimum speed connection.
Even though there are only eight rate limiting choices in the pull-down menu, you
can actually increase the number of options you have by setting the Priority Levels
on the Priority and VLAN Configuration tab. The following chart shows the various
options you can choose on a per port basis:
40 You can change the LAN Port Speed and Duplex settings. The default setting is for
the switch to automatically negotiate a speed and duplex that matches your
current network. However, you can select a setting between 10 and 100Mbps and
between Half and Full Duplex.
41 You can change the Maximum Frame Size setting if your network uses
non-standard frame sizes.
The standard maximum size of an Ethernet frame is 1518 bytes. If a VLAN tag is
added, the maximum size increases to 1522 bytes. As a result, this is the default
setting. If your network uses larger frames, you can select the 1536 byte option.
Restoring to Base Configurations
42 At the bottom of this window is an option to restore some of the configuration
settings to their default values. If you check this box, the following settings will be
restored:
Priority Option 0 2 4 6
Multiplier
1 2 4 8
Rate limiting option
128 Kbps 128 Kbps 256 Kbps 512 Kbps 1 Mb
256 Kbps 256 Kbps 512 Kbps 1 Mb 2 Mb
512 Kbps 512 Kbps 1 Mb 2 Mb 4 Mb
1 Mb 1 Mb 2 Mb 4 Mb 8 Mb
2 Mb 2 Mb 4 Mb 8 Mb 16 Mb
4 Mb 4 Mb 8 Mb 16 Mb 32 Mb
8 Mb 8 Mb 16 Mb 32 Mb 64 Mb
No limit Up to 100 Mb Up to 100 Mb Up to 100 Mb Up to 100 Mb
NOTE: The LAN Port Speed and Duplex settings will not work for the NJ225FX
because you cannot configure the fiber uplink. This field will be grayed out if
you are using the Configuration Management software with an NJ225FX.
Global Setting Default Value
Max Frame Size 1518 or 1522 if tagged
Counter Mode Count good frames
Priority Scheduling Mode 8, 4, 2, 1 weighted
VLAN Tag for LAN Port (egress) Egress frame unmodified
VLAN Tag for LAN Port (ingress) Ingress frame unmodified