Confige RMON Directory

This chapter explains how to configure rMon on router.

Configure rMon Warning on a router  

Configure rMon Event on a router  

Configure rMon Statistics on a router  

Configure rMon History on a router  

Display rMon configuration of a router  

 

Configure rMon Warning on a router

Users may configure rMon with command line or SNMP network management. If you want to make configurations with SNMP network management, you have to configure SNMP to the router in advance. After finishing the warning configuration, the device can monitor some statistics. To configure rMon Warning, follow the steps below:

Step

Command

Function

1.

configure

Enter Global Configuration Mode

2.

rmon alarm index variable interval {absolute | delta} rising-threshold value [eventnumber] falling-threshold value [eventnumber] [owner string]

To add an rMon Warning item

·        index ranges from 1 to 65535, which is the item index

·        variable is an MIB object, which is under monitored. A variable must be a valid MIB object and only 2 types of MIB objects, INTEGER.Counter.Gauge or TimeTicks, can be inspected

·        “interval” is the intermission for sampling (in seconds) with available value from 1 to 4294967295

·        Use absolute to inspect the value obtained by MIB objects, and use delta to inspect the variations between values

·        value is a threshold value for alerting a warning, and the corresponding eventnumber (optional) is the event index when the threshold value is reached

·        An “owner string” is the descriptive information of the warning

3.

exit

Back to Supervisor Mode

4 .

write

Save the configurations

After finishing one warning item, the device will obtain the oid specified by variable every interval second. System will make comparison between the obtained value and the previous one according to the type of warning (absolute or delta). If the obtained value is higher than the previous value and higher than the threshold value specified by rising-threshold, an event with an index as “eventnumber” will be launched. (No event will be launched if the value of “eventnumber” is zero or there is no event that has “eventnumber” as its index.) The above situation happens in descending values as well. If the oid specified by variable, this warning item status will be set to invalid. If users configure the Warning item of the same index with alarmcommand more than once, only the latest parameter is valid. Please use no rmon alarm indexcommanddelete as the warning item for index.

Configure rMon Event on a router

To configure the rMon Event, follow the steps below:

step

command

function

1.

configure

Enter Global Configuration Mode

2.

rmon event index [description string] [log] [owner string] [trap community]

To add a rMon Event item

·        “index” ranges from 1 to 65535, which is the item index

·        “description” is descriptive information for the event

·        “log” will add a piece of information in log table when the event is launched.

·        “trap” means when an event is launched, a trap also takes place; “community” is the name of the group

·        An “owner string” is the descriptive information of the event

3.

exit

Back to Supervisor Mode

4.

write

Save the configurations

After configuring an rMon event, when an rMon warning is launched, replace “eventLastTimeSent” with “sysUpTime” in this event table. If the event has been configured a long attribute, add a piece of information in the log table. If a trap attribute is configured, launch a trap with community. If users configure the same Event item of the same index with rmon eventcommand more than once, only the latest parameter is valid. Use no rmon event indexcommanddelete as an event item index.

Configure rMon Statistics on a router

rMon Statistics is used for inspecting statistics obtained from each device. To configure rMon Statistics, follow the steps:

step

command

function

1.

configure

Enter Global Configuration Mode

2.

interface iftype ifid

To enter Interface Configuration Mode

·        iftype is a type of interface

·        ifid is an interface id

3.

rmon collection stat  index [owner string]

To enable Statistics on the interface

·        “index” is the statistics item index

·        An owner string is the descriptive information of the statistic

4.

exit

Back to Global Configuration Mode

5.

exit

Back to Supervisor Mode

6.

write

Save the configurations

If users configure the Event item of the same index with rmon collection statcommand more than once, only the latest parameter is valid. Use “no rmon collection stats indexcommanddelete” as a statistics item index.

 

Configure rMon History on a router

rMon History is used for collecting statistics from one interface in different time period. To configure rMon History, follow the steps:

 

step

command

function

1.

configure

enter global configuration mode

2.

interface iftype ifid

enter interface configuration mode

·        iftype is the type of interface

·        ifid is the id of interface

3.

rmon collection history  index [buckets bucket-number] [interval second] [owner owner-name]

To enable Statistics on the interface.

·        “index” is the history item index

·        Keep the latest bucket-number item in the collected history record. Users may visit Ethernet History Record to obtain the statistics. Default number of records is 50.

·        “second” is the interval between obtaining statistics. Default value is 1800 seconds (30 minutes)

·        An “owner string” is the descriptive information of the History table.

4.

exit

Back to Global Configuration Mode

5.

exit

Back to Supervisor Mode

6.

write

Save configuration

After adding one History item, the device will obtain the statistics from the specified interface every specified seconds according to “second” and add the result to Ethernet History Record as an item. If users configure the “History” item of the same index with “rmon collection history indexcommand” more than once, only the latest parameter is valid. Notice that if you use “no rmon history indexcommanddelete” as History item index, a great “bucket-number” and short “interval second” will occupy too much system resource.

Display rMon configuration of a router

Display rMon configuration of a router with “showcommand”

command

function

show rmon [alarm] [event] [statistics] [history]

To display rMon configuration information

·        “alarm” is the Warning item configuration

·        “event” is Event item configuration. Log items resulted from launching an event are also displayed.

·        “statistics” is that when Statistics item configuration is displayed, statistics collected from the interface are also diaplayed.

·        “history” represents that when a History item configuration is displayed, statistics collected between the intervals are also displayed.