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.

 

 

 

 

 

 

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.

 

 

 

 

 

 

Collisions

When two or more devices attempt to transmit a message

 

 

 

 

on a cable at the same time, interfering with one another’s

 

Accessing

 

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.

 

 

 

 

 

FHub

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.

 

eatures

 

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).

 

 

 

 

 

 

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.

 

 

 

 

 

 

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.

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.

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Image 39
HP J3250M manual Configuring Your Device, Status Port Counters