Digital Equipment DECagent 90, Информация пользователя

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• Dh90SlotSecondarySpecific—Read-only
A table of IP addresses to which this device will send traps.
• Dh90TrapAddressTable—Not accessible
A table of IP addresses to which this device will send traps.
• Dh90TrapAddress—Read/write
An IP address to which all SNMP traps generated by this device will be sent.
Communities
A community in the SNMP sense is a set of manageable attributes that
are managed as a group. Normally, there is a one-community-to-one-agent
relationship. The manageable attributes are usually contained within a single
hardware device, or within a single enclosure in the case of hubs. The single
hardware device, or the collection of devices within a hub, is treated as one
community. A particular manageable entity is uniquely identified on the network
by the combination of an IP address and a community string.
A community string is a sequence of ASCII characters that is checked by the
SNMP agent for access control to the manageable entity. The community string
can be thought of as a password. There are two strings associated with a given
community: the read-only string and the read/write string. For a GET or a GET
NEXT operation, the agent will accept either the read-only or the read/write
string. However, for a SET operation, the agent will accept only the read/write
string.
An SNMP proxy agent, such as the DECagent 90, can translate from SNMP
to the native protocol understood by a non-SNMP speaking device. For proxy
agents, the manageable entities are often separate and distinct hardware devices.
The relationship changes to several communities per proxy agent. A particular
manageable entity is still identified on the network by the combination of an IP
address and a community string. Now, however, each community supported by
the proxy agent has its own set of read-only and read/write strings. Each read-
only string at a given IP address must be unique from all the others. Likewise,
each read/write string at a given IP address must be unique from all the others.
Because the proxy agent has only one IP address, the community strings are used
to index the separate and distinct manageable entities supported by that agent.
MIB Groups and Communities C–9