Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X User Manual

ContextName: router
ContextNameWildcard: True
■ See show snmp management-event.
Collecting Bulk Statistics
The router offers an efficient data collection and transfer facility for accounting
applications. The E Series router SNMP MIBs extend the accounting data collection
mechanism defined in the Accounting-Control-MIB (RFC 2513) to include support
for connectionless networks.
Service providers need reasonably accurate data about customers’ use of networks.
This data is used for billing customers and must be available at a customer’s request.
Accounting applications based on SNMP polling models consume significant network
bandwidth because they poll large volumes of data frequently.
Unfortunately, SNMP is not well suited for gathering large volumes of data, especially
over short time intervals. It is inadequate for use by accounting applications because:
■ The SNMP PDU layout has a low payload-to-overhead ratio.
■ Processing SNMP PDUs is expensive because objects and tables need to be sorted
in lexicographic order.
The router avoids the need for continuous polling of SNMP statistics by using
applications known as collectors to retrieve data. You can configure up to six collectors.
The router sends collected statistics through FTP to assigned hosts, known as receivers.
You must assign a primary receiver to each collector, and you can assign a secondary
receiver for redundancy.
NOTE: The basic-encoding-rules (BER)–encoding choice is not supported.
You can collect interface bulk statistics based on sets of virtual router groups. If sets
of virtual router groups generally correspond to ISPs, you can then forward the
relevant data to a particular ISP.
To configure a collector to include data from a specific list of virtual routers, you
must first configure a collector and then associate a router set with it. A collector can
have up to 64 virtual routers associated with it.
To collect bulk statistics for a subset of all configured subinterfaces, you can define
the subinterfaces using the following syntax:
Slot/Port[.subInterfaceId]
Per virtual router collection is supported on the if-stats and igmp schemas. It is
supported on all interface types supported by BulkStats. Collectors modified to use
per virtual router collection or configured after a collector has started have a time
delay (up to the configured time in seconds) until an active collector starts again.
Collecting Bulk Statistics ■ 195
Chapter 4: Configuring SNMP

Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Specifications

General

Brand	Juniper
Model	SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X
Category	Software
Language	English