Cisco Systems 1900, 2820 manual Limitations, Usage Guidelines

Limitations

Limitations

These sections provide usage limitations for the switches.

Limitation Specific to the Catalyst 2820 Switches

After removing or inserting a module, click Reload to display a fresh switch image on the Home page.

Limitations for the Catalyst 1900 and Catalyst 2820 Switches

•Clicking Reload from any switch manager page displays a fresh copy of the Home page, not the currently displayed page.

•The switch manager does not check parameter values that are outside the value range. If you enter an invalid parameter value, the switch manager redisplays the switch manager page with the original value. Parameter value ranges are provided in the management console, the switch manager online help, and the Catalyst 1900 Series Installation and Configuration Guide and the Catalyst 2820 Series Installation and Configuration Guide.

•RMON statistics gathering has these maximum limits:

–27 rows in these tables: etherStatsTable, historyControlTable, alarmTable, and eventTable.

–If you are logging events, you can have ten entries per event, and the list is circular.

Usage Guidelines

These sections provide usage guidelines for the switches:

•“Usage Guidelines Specific to the Catalyst 1900 Switches” section on page 4

•“Usage Guidelines Specific to the Catalyst 2820 Switches” section on page 5

•“Usage Guidelines for the Catalyst 1900 and Catalyst 2820 Switches” section on page 5

Usage Guidelines Specific to the Catalyst 1900 Switches

This section describes usage guidelines specific to the Catalyst 1900 switches.

•Some switches are shipped with screws installed in the top rack-mounting holes closest to the front panel. If you want to rack-mount the switch with the front panel forward, remove these screws before attaching the mounting brackets. Do not use these screws to attach the mounting brackets to the switch. Use the screws supplied with the brackets. For information on attaching the mounting brackets to the switch, refer to the Catalyst 1900 Series Installation and Configuration Guide.

•If you connect to the switch attachment unit interface (AUI) port, you might notice that the fan in the switch slows down. This does not affect the operation of the switch.

•If there is no link after you connect an MT-RJ fiber-optic port on a WS-C1924F-A or a WS-C1924F-EN switch to an SC port on a 100BASE-FX-compatible device, the polarity of the SC connectors on the MT-RJ patch cable and the SC port on the device might not match. Remove the SC connectors from the snap-on holder on the cable, and transpose the connectors for A and B.

Release Notes for the Catalyst 1900 and Catalyst 2820 Series Switches, Version 9.00.06

4 OL-2901-01