Remote Network Monitoring (RMON) History and View the History Table on SFE/SGE Managed Switches

Objectives

The Remote Network Monitoring (RMON) was developed by the Internet Engineering Task Force (IETF) to support monitoring and protocol analysis of LANs. RMON specifically defines the information that any network monitoring system will be able to provide. The RMON consists of ten groups: Statistics, Event, History, Alarm, Hosts, Hosts Top N, Matrix, Fliter, Capture, Token Ring.

This document explains how to configure the History and the History table in RMON on SFE/SGE Managed Switches.

Applicable Devices

• SFE/SGE Managed Switches

RMON History

Configuration of RMON History

Step 1. Log in to the web configuration utility and choose Statistics > RMON > History. The History page opens:

Step 2. Click Add. The Add RMON History window appear:

Step 3. The New History Entry field displays the event entry index number for the new entry.

Step 4. Click the desired type of interface radio button from where the history samples are to be taken and choose the interface from the drop-down list:

• Port — Choose the desired ethernet or gigabit ports. In this option statistics for a single port are received.

• LAG — Choose the desired link. Link Aggregation Group (LAG) is an option that contain set of ports.

Step 5. Enter the RMON station device user that requested the RMON information in the Owner field.

Step 6. Enter the number of samples to store in the Max No. of Samples to Keep field. The default value is 50.

Step 7. Enter the time in seconds that samples are collected from the ports in the Sampling Interval field. The range is 1-3600 seconds.

Step 8. Click Apply to save. The entry is added to the History Control Table on the History page and the running configuration file is updated.

View the RMON History Table

Step 1. Log in to the web configuration utility and choose Statistics > RMON > History. The History page opens:

Step 2. Click History Table to view the actual statistics. The History Control Table page opens:

The following fields are displayed:

• Owner — Displays history table entry owner.

• Sample No. —  Statistics which were taken from this sample.

• Drop Events — The dropped packets due to lack of network resources during the sampling interval.

• Bytes Received — The octets received including bad packets and FCS octets, but excluding framing bits.

• Packets Received —  The packets received including Bad packets, Multicast, and Broadcast packets.

• Broadcast Packets — The good broadcast packets received. This number does not include Multicast packets.

• Multicast Received — The good Multicast packets received.

• CRC Align Errors — The CRC and Align errors that have occurred.

• Undersize Packets — The undersized packets (less than 64 octects) received.

• Oversize Packets —  The oversized packets (over 1518 octets) received.

• Fragments — The fragments (packets with less than 64 octets) received, excluding framing bits, but including FCS octets.

• Jabbers — this field displays the total number of received packets that were longer than 2000 octets. This number excludes frame bits, but included FCS octets that had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral octet (Alignment Error) number.

• Collisions — The collisions received on the interface.

• Utilization —The percentage of current interface traffic compared to maximum traffic that the interface can handle.