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RMON provides support for the following groups of Token Ring extensions:
MAC−Layer Statistics Group—A collection of statistics from the MAC sublayer of the Data Link
layer, kept for each Token Ring interface. This group collects information such as the total number of
MAC layer packets received and the number of times the port entered a beaconing error state.
•
Promiscuous Statistics Group—A collection of promiscuous statistics kept for non−MAC packets on
each Token Ring interface. This group collects information such as the total number of good
non−MAC frames received that were directed to a Logical Link Control (LLC) broadcast address.
•
Ring Station Group—A collection of statistics and status information associated with each Token
Ring station on the local ring. This group also provides status information for each ring being
monitored.
•
Ring Station Order Group—A list of the order of stations on the monitored Token Ring network’s
rings.
•
To see a list of available commands, use the ? command. Table 2.1 provides a list of the ROM command−line
interface commands and a brief description of each.
Table 2.1: ROM command−line interface commands.
Command Description
alias Configures and displays aliases
boot Boots up an external process
confreg Configures the configuration register utility
dev Shows device IDs available on a platform
dir Shows files of the named device
history Shows the last 16 commands
meminfo Shows switch memory information
repeat Repeats a specified command
reset Performs a switch reboot/reset
set Shows monitor variable names with their values
sync Saves the ROM monitor configuration
unalias Deletes the alias name and associated value from the
alias list
unset=varname Deletes a variable name from the variable list
varname=value Assigns a value to a variable
Connecting to the Console Port
To initially configure a switch, you must make a connection to the console port and enter instructions to the
switch from this port. The console comes preconfigured on a Cisco device and ready to use. You can access
the console port in a number of ways, as shown in Figure 2.2.
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