Table 4: Dashboard Fields (continued)
Field
Description
System Up Time
The time in days, hours, minutes and seconds since the system was last reset.
Device Information
Machine Type
The device hardware type or product family.
Machine Model
The model identifier, which is usually related to the Machine Type.
Serial Number
The unique device serial number.
FRU Number
The field replaceable unit number.
Maintenance Level
The device hardware change level identifier.
Software Version
The release.version.maintenance number of the software currently running on the
device. For example, if the release is 1, the version is 2 and the maintenance number is 4,
this version number is displayed as 1.2.4.
Operating System
The device operating system type and version identification information.
System Resource Usage
CPU Utilization (60
Second Average)
The percentage of CPU utilization for the entire system averaged over the past 60
seconds.
Memory Usage
The percentage of total available system memory (RAM) that is currently in use.
Disk Space Utilization
Disk Usage
The percentage of total available disk space that is currently in use.
Additional Fields
Logged In Users
A brief summary indicating all other users currently logged into the device. The Idle Time
field gives an indication of user activity, with a smaller time value denoting more recent
access to the system.
Recent Log Entries
A brief list of the newest entries recorded in the system log.
Click
Refresh
to reload the page and refresh the Dashboard.
Viewing ARP Cache
The
ARP (Address Resolution Protocol)
cache is a table maintained locally in each station on a network.
ARP cache entries are learned by examining the source information in the ARP packet payload fields,
regardless of whether it is an ARP request or response. Thus, when an ARP request is broadcast to all
stations on a LAN segment or
, every recipient has the opportunity to store the
sender’s IP and MAC address in their respective ARP cache. The ARP response, being unicast, is
normally seen only by the requestor, who stores the sender information in its ARP cache. Newer
information always replaces existing content in the ARP cache.
The ARP cache can support 1024 entries, although this size is user-configurable to any value less than
1024. When multiple network interfaces are supported by a device, as is typical of a router, either a
single ARP cache is used for all interfaces, or a separate cache is maintained per interface. While the
latter approach is useful when network addressing is not unique per interface, this is not the case for
Ethernet MAC address assignment so a single ARP cache is employed.
Configuring System Information
ExtremeSwitching 200 Series: Administration Guide
35
