User guide

ExtremeWare EPICenter Software Installation and User Guide 11-3

Displaying Multi-port Statistics

When you click the RT Stats button in the Navigation Toolbar, the main Real-Time

Statistics page is displayed, as shown in Figure 11-1. Initially, no data is displayed—you

see a message asking you to select a device, device slot, or port group to be displayed.

The Component Treedisplays the devices and port groups for which you can display

statistics. An “S” in a red circle next to a device name indicates that the device is not

responding to SNMP requests. A port group with a red-circled “S” indicates that the port

group is empty.

The Real-Time Statistics applet does not support hierarchical port groups. If you

have created port groups in the Grouping Manager that include subgroups as

members, the subgroups will not appear in the Component Tree of the Real-Time

statistics applet. Instead, any ports that are members of subgroups will be displayed

directly under the top-level port group, as if they are members of the top-level group.

etherHistoryFragments The total number of packets received during this

sampling interval that were less than 64 octets in length

(excluding framing bits but including FCS octets) had

either a bad Frame Check Sequence (FCS) with an

integral number of octets (FCS Error) or a bad FCS with

a non-integral number of octets (Alignment Error).

etherHistoryJabbers The number of packets received during this sampling

interval that were longer than 1518 octets (excluding

framing bits but including FCS octets), and had either a

bad Frame Check Sequence (FCS) with an integral

number of octets (FCS Error) or a bad FCS with a

non-integral number of octets (Alignment Error).

etherHistoryCollisions The best estimate of the total number of collisions on

this Ethernet segment during this sampling interval.

Table 11-2: Definition of RMON etherHistory Error Variables for Port Error Displays