Hood J3250M Manuale Utente
Accessing Hub Features
Configuring Your Device
Table 6-2.
Switching Hub Global Counters
Counter
Description
Total Octets
Total number of octets of data (including bad packets)
received on the network. This object can be used to
estimate Ethernet utilization.
received on the network. This object can be used to
estimate Ethernet utilization.
Broadcast Packets
Messages sent to all users on the network.
Multicast Packets
Multicast packets are delivered to a subset of users on the
network, as opposed to Broadcast packets, which are sent
to all users.
network, as opposed to Broadcast packets, which are sent
to all users.
Collisions
When two or more devices attempt to transmit a message
on a cable at the same time, interfering with one another’s
transmissions. The number of collisions should be
proportional to the number of packets transmitted over time
and the number of nodes operating on the network.
on a cable at the same time, interfering with one another’s
transmissions. The number of collisions should be
proportional to the number of packets transmitted over time
and the number of nodes operating on the network.
CRC/Alignment Errors
The Cyclic Redundancy Check (CRC) is a code typically
placed at the end of the frame or packet to ensure the
integrity of the data within the frame.
Alignment Errors are the number of instances where the
CRC method was used to correct a packet whose bits were
misaligned because of timing errors.
placed at the end of the frame or packet to ensure the
integrity of the data within the frame.
Alignment Errors are the number of instances where the
CRC method was used to correct a packet whose bits were
misaligned because of timing errors.
Fragments
Total number of packets received that were less than 64
octets in length and had a bad Frame Check Sequence
(FCS).
octets in length and had a bad Frame Check Sequence
(FCS).
Jabbers
Total number of packets received that were longer than
1518 octets and had a bad Frame Check Sequence (FCS).
High levels indicate too many packet transmissions.
1518 octets and had a bad Frame Check Sequence (FCS).
High levels indicate too many packet transmissions.
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Status - Port Counters
The Port Counters button displays a page with information about important
counters for each port. See the online help for information on each counter.
counters for each port. See the online help for information on each counter.
Configuring Your Device
When you select the Configuration tab the Device View (formerly a Closeup
View) is displayed in the page. The other buttons in this page provide access
to various configuration features for that device.
View) is displayed in the page. The other buttons in this page provide access
to various configuration features for that device.
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