3Com Router User Manual

SNMP Overview77
“Corporation code of 3Com Corporation. (800007DB) + Equipment information”. 
Equipment information can be the IP address, MAC address or self-defined 
hexadecimal digit string.
You can skip these two operations when you begin to configure SNMP for a router 
because SNMP service will be enabled once you configure any related SNMP 
commands (except for the 
display commands). It is equivalent to configuring the 
snmp-agent command. Furthermore, the default engine ID can generally ensure...

78CHAPTER 5: CONFIGURING NETWORK MANAGEMENT
By default, SNMPv3 is used. The default view name in the system is ViewDefault, 
and OID of which is 1.3.6.1. SNMP group has only the read-only authority by 
default.
If SNMPv1/SNMPv2c is used, the community name or SNMPv1/SNMPv2c groups 
and users should be configured. If SNMPv3 is used, SNMPv3 groups and users 
should be configured.
Before configuring an SNMP group, you should first define the view, which will be 
used for configuring the SNMP group. When...

SNMP Overview79
By default, the router is disabled to send traps.
5Configure the maximum size of SNMP packets that the router can send/receive
Set the Max SNMP messages that can be received/sent by the agent according to 
the network loading capacity.
Perform the following configurations in system view.
Ta b l e 61   Configure the maximum size of SNMP packets that the agent can send/receive 
Display and Debug 
SNMPPerform the following commands in all views.
Ta b l e 62   Display and debug SNMP
Set the...

80CHAPTER 5: CONFIGURING NETWORK MANAGEMENT
Typical Configuration 
ExamplesExample 1: Configure Network Management of SNMPv1
I. Networking Requirements
In the following diagram the NMS and a router are connected via the Ethernet. 
The IP addresses of NMS and the Ethernet interface on the router are respectively 
129.102.149.23 and 129.102.0.1.
II. Networking Diagram
Figure 3-3Configure SNMP
III. Configuration Procedure
1Enable the router to support SNMP and select an SNMP version.
[Router] snmp-agent...

RMON Overview81
■Required if traps are to be sent — the IP address of the interface ethernet 0 is 
the source address of the traps, and the address of the NMS is the destination 
address.
II. Networking Diagram
Refer to the networking diagram of Example 1.
III. Configuration Procedure
1Enable the router to support SNMP and select an SNMP version.
[Router] snmp-agent
2Set SNMP groups, users and views.
[Router] snmp-agent mib-view included read_view subtree 1.3.6.1 
[Router] snmp-agent mib-view included...

82CHAPTER 5: CONFIGURING NETWORK MANAGEMENT
thus managing large-scale interconnection networks easily and effectively. RMON 
also allows several monitors and can collect data in two ways: one is to collect 
with the RMON probe — NMS directly obtains management data from an RMON 
probe and controls network resources. In this way, all RMON MIB data can be 
obtained. The other way is by the RMON Agent directly implanted in network 
equipment (router, switch and HUB) which will become network facilities with...

RMON Overview83
■Enable RMON statistics of Ethernet interface
1Enable RMON statistics of Ethernet interface
After enabling RMON statistics of an Ethernet interface, the router will perform 
the statistics of the packet incoming and outgoing through this interface. After 
disabling it, the router will not perform the statistics of the packet incoming and 
outgoing through this interface.
Perform the following task in Ethernet interface view.
Ta b l e 63   Enable RMON statistics of an Ethernet interface...

84CHAPTER 5: CONFIGURING NETWORK MANAGEMENT
[RouterA] interface ethernet 0
[RouterA-Ethernet0] rmon promiscuous 

6
DISPLAY AND DEBUGGING TOOLS
This chapter includes information on the following topics:
■Display Command Set
■Debugging Command Set
■Test Tool of Network Connection
■Log Function
Display Command SetWith display commands, the system status and system information can be 
viewed. 
display commands can be divided as follows according to the 
functionality:
■The command to display system configuration information
■The command to display system running status
■The command to display system statistic...

86CHAPTER 6: DISPLAY AND DEBUGGING TOOLS
Two switches control the output of the debugging information:
■Debugging switch, which controls whether to test a certain 
function/module/protocol. 
■Syslog output direction switch, which controls outputting the debugging 
information to the control console, Telnet terminal or internal buffer or log 
host. 
The following is part of the common debugging commands. For more specific 
debugging commands related to various protocols, please see related chapters in...