Schmid Watson Specifications Page 86

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Watson 5 Ethernet
Operating Manual
W5-Ethernet-Manual.doc
Version 2.0-01
8-2 Revision: 2006-04-27
Management System
Master Agent
Subrack-wide information (e.g.
mib-2.system)
Per-plugin information (e.g. mib-
2.interfaces.ifTable)
Interfaces of Plugin 1
Subagent
Plugin 1
Per-plugin information (e.g. mib-
2.interfaces.ifTable)
Interfaces of Plugin 2
Per-plugin information (e.g. mib-
2.interfaces.ifTable)
Interfaces of Plugin n
Subagent
Plugin 2
Subagent
Plugin n
Subagent
(Rack Agent)
...
Located on master agent plugin
Located on other plugins
Subrack (SZ.379.V3)
...
Figure 8-1: SNMP Master agent and subagents
8.1.2 SNMP Configuration
IP addresses and master agent behavior must be configured as follows:
1) One plugin in the subrack must be designated as master agent functions (Monitor command
MASTERAGENT ON). This plugin communicates with the management system.
2) The MASTERIP address of the master agent plugin must be configured to the MGMT2 ad-
dress of this (i. e. the master agent) plugin.
3) The master agent function must be disabled on all other plugins in the subrack (Monitor com-
mand MASTERAGENT OFF).
4) The MASTERIP address of all other plugins must be configured to the MGMT2 address of
the master agent plugin.
8.1.3 The Entity MIB
A subrack is modeled with the Entity MIB (cf. 8.2.5) that describes the relation between subrack,
plugins and ports. The entPhysicalTable and the entAliasMappingTable are
used.
A subrack is represented by a single row in the entPhysicalTable with an entPhysi-
calClass of chassis.
Every slot in the subrack is represented by a row of the entPhysicalTable with an ent-
PhysicalClass value container.
Every plugin is represented by a row of the entPhysicalTable with entPhysical-
Class set to module. The column entPhysicalParentRelPos represents the slot
number, column entPhysicalContainedIn gives the relation to the subrack.
Each port (DSL or Ethernet) is represented by a row of the entPhysicalTable with ent-
PhysicalClass set to port. Column entPhysicalParentRelPos is the port num-
ber. Column entPhysicalContainedIn gives the relation to the plugin.
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