LevelOne ProCon GSW-1290, User Manual

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LevelOne GSW-1290 Gigabit Layer2 SNMP Switch
In SNMP v.1 and v.2, user authentication is accomplished using ‘community strings’, which function like
passwords. The remote user SNMP application and the Switch SNMP must use the same community string.
SNMP packets from any station that has not been authenticated are ignored (dropped).
The default community strings for the Switch used for SNMP v.1 and v.2 management access are:
public - Allows authorized management stations to retrieve MIB objects.
private - Allows authorized management stations to retrieve and modify MIB objects.
SNMP v.3 uses a more sophisticated authentication process that is separated into two parts. The first part is
to maintain a list of users and their attributes that are allowed to act as SNMP managers. The second part
describes what each user on that list can do as an SNMP manager.
The Switch allows groups of users to be listed and configured with a shared set of privileges. The SNMP
version may also be set for a listed group of SNMP managers. Thus, you may create a group of SNMP
managers that are allowed to view read-only information or receive traps using SNMP v.1 while assigning
a higher level of security to another group, granting read/write privileges using SNMP v.3.
Using SNMP v.3 individual users or groups of SNMP managers can be allowed to perform or be restricted
from performing specific SNMP management functions. The functions allowed or restricted are defined
using the Object Identifier (OID) associated with a specific MIB. An additional layer of security is
available for SNMP v.3 in that SNMP messages may be encrypted. To read more about how to configure
SNMP v.3 settings for the Switch read the next section, Management.
Traps
Traps are messages that alert network personnel of events that occur on the Switch. The events can be as
serious as a reboot (someone accidentally turned OFF the Switch), or less serious like a port status change.
The Switch generates traps and sends them to the trap recipient (or network manager). Typical traps include
trap messages for Authentication Failure, Topology Change and Broadcast\Multicast Storm.
MIBs
Management and counter information are stored by the Switch in the Management Information Base (MIB).
The Switch uses the standard MIB-II Management Information Base module. Consequently, values for
MIB objects can be retrieved from any SNMP-based network management software. In addition to the
standard MIB-II, the Switch also supports its own proprietary enterprise MIB as an extended Management
Information Base. The proprietary MIB may also be retrieved by specifying the MIB Object Identifier.
MIB values can be either read-only or read-write.
IP Address Assignment
Each Switch must be assigned its own IP Address, which is used for communication with an SNMP
network manager or other TCP/IP application (for example BOOTP, TFTP). The Switch’s default IP
address is 10.90.90.90. You can change the default Switch IP address to meet the specification of your
networking address scheme.
The Switch is also assigned a unique MAC address by the factory. This MAC address cannot be changed,
and can be found from the initial boot console screen – shown below.
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