Cisco ASR 5000 Series, Обзор продукта

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Web Element Manager Overview
▀ WEM Architecture
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
The Bulk Statistics Server parses collected statistics and stores the information in the PostgreSQL database. If XML file
generation and transfer is required, this element generates the XML output and can send it to a Northbound NMS or an
alternate bulk statistics server for further processing.
Additionally, if archiving of the collected statistics is desired, the Bulk Statistics server writes the files to an alternative
directory on the server. A specific directory can be configured by the administrative user or the default directory can be
used. Regardless, the directory can be on a local filesystem or on an NFS-mounted filesystem on the WEM server.
Script Server
The WEM supports the ability to configure the properties for alarms. One of the properties that can be configured is
specifying a script that can be executed upon receipt of that alarm. The Script Server process is responsible for
executing the specified script.
Upon receipt of the alarm, the WEM Server FCAPS Support function passes the name of the script to execute and the
trap logged time to the Script Server. An acknowledgement is sent and the script is executed by the Script Server. In the
event, an error is experienced while executing the script, the Script Server generates an SNMP trap.
PostgreSQL Database Server
The PostgreSQL Database consists of multiple databases maintaining information pertaining to the following WEM
functions:
Configuration: This database contains tables which maintain configuration information for user details,
topology for maps and manageable systems.
Trap: This database contains tables which maintain SNMP trap configuration information and all the received
SNMP traps.
MIB: This database contains all the information required to translate SNMP Object identifiers to proper MIB
names and their types as given in the MIB file.
Audit Trail: This database contains table that maintains the configuration trail including the following:
Configuration performed on each system through the WEM
Configuration done through the system‘s CLI (this is known via the CORBA notification service)
Login/out from the WEM and system CLI
The addition/deletion of a new system in the managed system list
Bulk Statistics: This database contains various tables containing counter values periodically received from the
system via the File Transfer Protocol (FTP).