Enterasys Networks VH-8TX1MF, VH-8TX1UM manual Rmon

An RS-232 connection, using a DB-9 connector, is included on the rear panel for system management. Serial console management can be performed out-of-band using a terminal or computer running communications software. You can connect directly to the RS-232 port on the rear panel, or make a connection via a modem. See the Management Guide for information on managing the VH-8TX1UM/ VH-8TX1MF switch via the serial console.

•Telnet, in-band (over Ethernet)

The switch supports management through a Telnet connection using the TCP/IP protocols. Telnet is performed using a terminal or computer running communications software. See the Management Guide for information on managing the system via Telnet. Global user name and password protection for changing the operating parameters of the switch is provided.

•Web-based network manager, in-band

The system can be managed over HTTP protocol with a Web browser (Internet Explorer 4.0 or above, or Netscape Navigator 4.0 or above). Standard agent MIBs embedded in the switch provide basic SNMP management through an embedded graphic interface.

•SNMP-based network manager, in-band

The system can also be managed using SNMP, the most common protocol used today for network management. Standard agent MIBs embedded in the switch provide basic SNMP management through industry-standard SNMP applications.

Management security protection is provided based on SNMP community names. See Chapter 4, “SNMP Management,” in the Management Guide for more information.

RMON

RMON (Remote Monitoring) is a facility used to manage networks remotely while providing multi-vendor interoperability between monitoring devices and management stations. RMON is defined by an SNMP MIB. This MIB is divided into nine different groups, each gathering specific statistical information or performing a specific function. RMON-capable devices gather network traffic data and then store them locally until downloaded to an SNMP management station.

The VH-8TX1UM/VH-8TX1MF supports four of the nine groups of RMON defined for Ethernet networks on a per segment basis. Specifically, these are:

•Statistics: a function that maintains counts of network traffic statistics such as number of packets, broadcasts, collisions, errors, and distribution of packet sizes.

•History: a function that collects historical statistics based on user- defined sampling intervals. The statistical information collected is the same as the Statistics group, except on a time stamped basis.

•Alarm: a function that allows managers to set alarm thresholds based on traffic statistics. Alarms trigger other actions through the Event group.

6 Product Overview VH-8TX1UM/VH-8TX1MF