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Revision: 2010-01-20
8-1
8 SNMP
8.1 Introduction
The Watson Ethernet plug-in contains a built-in SNMP agent. The agent is ac-
cessible through the front-panel Q interface connector or through Ethernet in-
band management, either from an Ethernet user interface or over the DSL
Ethernet payload, cf. 3.5.
The agent uses standardized Management Information Bases (MIBs) to
represent the managed objects of the plug-in, its interfaces, the DSL spans and
the Ethernet bridging functions. All supported variables are listed in chapter 8.2.
The Watson Ethernet tabletop modem when connected as DSL slave to a Wat-
son Ethernet plug-in is manageable through the SNMP agent of the plug-in. The
tabletop modem is modeled with a vendor-specific MIB (Schmid Telecom HDSL
MIB, cf. 8.2.12).
If two Watson Ethernet plug-in modems are connected back to back then each is
managed by its own SNMP agent. In this situation the slave modem will normally
use Ethernet inband management.
8.1.1 AgentX
Several Watson Ethernet plug-in cards, installed in the same subrack, act as a
single SNMP agent towards the management system. The agents on the individ-
ual plug-ins cooperate to form one common data structure of the management
information available on each plug-in.
Within a subrack SNMP functions are divided between
a single processing entity called the master agent, which sends and receives
SNMP protocol messages in an agent role
several processing entities called subagents, which are "shielded" from the
SNMP protocol messages processed by the master agent, but which have
access to management information.
From the management systems point of view this combination of one master
agent and several subagents behaves exactly as would a single agent that has
access to the all management information within the subrack.
The communication between master agent and subagents uses the AgentX pro-
tocol which has been standardized as RFC 2741.
- Declaration of Conformity 3
- Limited Product Warranty 9
- Table of Contents 11
- 1 Related Documents 17
- 2 Overview 19
- 3 Modem Features 23
- 3.1.2 Multipair operation 24
- 3.1.4 Power Backoff 26
- 3.1.7 Wetting Current 28
- 3.1.8 Master / Slave 29
- 3.1.9 DSL Clocking 29
- 3.2.1 Ethernet over DSL 29
- 3.2.2 Ethernet Bridging 30
- 3.2.4 VLANs 31
- 3.2.5 VLAN Examples 31
- 3.2.7 Stacked VLANs 35
- 3.3.1 Ethernet over DSL 41
- 3.3.2 VLAN features 41
- 3.3.4 Cisco HDLC 42
- 3.4 Firmware update 43
- 3.5 Management 43
- DISCONNECT 45
- 3.7 Test loops 48
- 3.8 Password protection 49
- 4 Powering 51
- 5 LEDs and Alarms 53
- 5.2 Tabletop LEDs 54
- 5.3 Alarm Conditions 55
- 5.4 Alarm Relays 55
- 5.5 Initialization Errors 56
- 6 The Monitor 57
- 6.2 Addressing of Plug-ins 58
- 6.3 Naming of ports 59
- 6.4 Telnet Access 59
- 6.5.1 Welcome Screen 60
- 6.5.2 Menus 60
- 6.5.4 Tab completion 61
- 6.5.5 Help 61
- 6.5.6 Command History 61
- 6.5.7 Continuous Displays 62
- 7.1 Introduction 63
- 7.2.1 General Commands 64
- DEFAULT Configuration 66
- 7.3.1 Diagnostic 89
- 7.3.2 Status (Plug-in) 90
- 7.3.3 Status (Tabletop) 92
- 7.3.4 Alarms 93
- 7.3.5 Test loops 95
- 7.3.6 Reset Commands 95
- 7.4.1 G.826 Statistics 96
- 7.4.2 Ethernet Statistics 97
- 7.5.1 Connection control 100
- 7.5.2 Inventory 100
- 7.5.3 Password 101
- 7.5.4 Firmware Update 103
- 8 SNMP 105
- ENTITIY-MIB 106
- 8.1.3 SNMP Configuration 107
- 8.1.4 The Entity MIB 107
- 8.1.6 The ifTable 109
- 8.2 MIB Reference 110
- 8.2.5 RMON (RFC 2819) 111
- 8.2.6 IF MIB (RFC 2863) 111
- 8.2.11 MAU MIB (RFC 3636) 112
- 8.2.15 HDSL MIB 114
- 8.2.16 Schmid MIB 115
- 8.2.17 Watson MIB 115
- 9 Front and Rear Panels 117
- 10 Connectors and Cables 119
- 10.2 DSL Interface 121
- 10.2.2 DSL Cable 122
- 10.3 Ethernet Interface 123
- 10.4 Monitor Interface 123
- 10.5 Power and Grounding 124
- 11.1 Interfaces 127
- 11.2 Power Consumption 128
- 11.3 Ethernet 128
- 11.5 Management Functions 129
- 11.6 MTBF 129
- 11.7 Environment 130
- 12 Terminology 131
- 13 Product Order Codes 133
- Revision: 2010-01-20 134
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