Allied Telesis AT-S60 - Manual (Page 297)

AT-S60 Management Software User’s Guide
Section III: SNMPv3 Protocol 297
The AT-S60 software supports the MIB tree, starting with the Internet
MIBs, as defined by 1.3.6.1. There are two ways to specify a MIB view. You
can enter the OID number of the MIB view or its equivalent text name.
For example, to specify MIBs in the Internet view, you can enter the OID
format “1.3.6.1” or the text name “internet.”
In addition, you can define a MIB view that the user can access or a MIB
view that the user cannot access. When you want to permit a user to
access a MIB view, you include a particular view. When you want to deny
a user access to a MIB view, you exclude a particular view.
After you specify a MIB Subtree view you have the option of further
restricting a view by defining a Subtree Mask. The relationship between
a MIB Subtree View and a Subtree Mask is analogous to the relationship
between an IP address and a subnet mask. The switch uses the subnet
mask to determine which portion of an IP address represents the
network address and which portion represents the node address. In a
similar way, the Subtree Mask further refines the Subtree View and
enables you to restrict a MIB view to a specific row of the OID MIB table.
Naturally, you need a thorough understanding of the OID MIB table to
define a Subtree Mask.
SNMPv3 Storage
Types
Each SNMPv3 table entry has its own storage type. You can choose
between NonVolatile storage which allows you to save the table entry or
Volatile storage which does not allow you to save an entry. If you select
the Volatile storage type, when you power off the switch your SNMPv3
configuration is lost and cannot be recovered.
At each SNMPv3 menu, you are prompted to configure a storage type.
You do not have to configure the same storage type value for each table
entry.
SNMPv3
Message
Notification
When you generate an SNMPv3 message from the switch, there are
three basic pieces of information included in the message:
❑ The type of message
❑ The destination of the message
❑ SNMP security information
To configure the type of message, you need to define if you are sending
a Trap or Inform message. Basically, the switch expects the authoritative
entity (or NMS) to respond to an Inform message. The switch does not
expect the authoritative entity to respond to a Trap message. These two
message types are defined in the SNMPv3 (RFC 2571-6).