Specifying An Snmp Trap Receiver; Specifying A Single Trap Source - Dell PowerConnect B-RX Configuration Manual

Specifying an SNMP trap receiver

You can specify a trap receiver to ensure that all SNMP traps sent by the device go to the same
SNMP trap receiver or set of receivers, typically one or more host devices on the network. When you
specify the host, you also specify a community string. The device sends all the SNMP traps to the
specified hosts and includes the specified community string. Administrators can therefore filter for
traps from a device based on IP address or community string.
When you add a trap receiver, you can specify whether to have the community string encrypted or
to have it shown in the clear. In either case, the software does not encrypt the string in the SNMP
traps sent to the receiver.
To specify an SNMP trap receiver, enter a command such as the following.
BigIron RX(config)# snmp-server host 2.2.2.2 1 mypublic port 200
BigIron RX(config)# write memory
The first commands adds trap receiver 2.2.2.2, configures the software to encrypt display of the
community string, and designates the UDP port that will be used to receive traps. The second
command saves the community string to the startup configuration file, and the software adds the
following command to the file.
snmp-server host 2.2.2.2 1 <encrypted-string>
Syntax: snmp-server host <ip-addr> [0 | 1] <string> [port <value>]
The <ip-addr> parameter specifies the IP address of the trap receiver.
The 0 | 1 parameter specifies whether you want the software to encrypt the string (1) or show the
string in the clear (0). The default is 0.
The <string> parameter specifies an SNMP community string configured on the device. It can be a
read-only string or a read-write string. It is not used to authenticate access to the trap host, but it is
a useful method for filtering traps on the host. For example, if you configure each of your device
devices that use the trap host to send a different community string, you can easily distinguish
among the traps from the devices based on the community strings.
The port <value> parameter specifies the UDP port that will be used to receive traps. This
parameter allows you to configure several trap receivers in a system. With this parameter, IronView
Network Manager and another network management application can coexist in the same system.
The device can be configured to send copies of traps to more than one network management
application.

Specifying a Single trap source

You can specify a single trap source to ensure that all SNMP traps sent by the device use the same
source IP address. When you configure the SNMP source address, you specify the Ethernet port,
loopback interface, or virtual routing interface that is the source for the traps. The device then uses
the lowest-numbered IP address configured on the port or interface as the source IP address in the
SNMP traps it sends.
Identifying a single source IP address for SNMP traps provides the following benefits:
•
BigIron RX Series Configuration Guide
53-1001810-01
Configuring Simple Network Management Protocol(SNMP) traps
If your trap receiver is configured to accept traps only from specific links or IP addresses, you
can simplify configuration of the trap receiver by configuring the device to always send the
traps from the same link or source address.
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