Ethernet Subagent; Architectural Overview; The Ethernet Subagent And Its Managed Resources; The Ethernet Subagent And The Snmp Agent - HP T9576G06 Management Manual

14

Ethernet Subagent

This section describes the Ethernet Subagent and the MIBs it supports.The Ethernet
Subagent allows Ethernet resources on NonStop systems to be monitored by SNMP
managers. The Ethernet Subagent provides statistics about Ethernet interfaces (E4SA,
GESA, and G4SA interfaces) with the ServerNet LAN System Access (SLSA)
subsystem, which supports parallel LAN I/O in a G-series ServerNet-based system.
The Ethernet Subagent also supports additional private MIB objects defined by HP that
let you monitor and manage the subagent itself.

Architectural Overview

The Ethernet Subagent supports management of Ethernet resources and the subagent
in the following ways:
The Ethernet Subagent implements the dot3StatsTable, defined in RFC 1643,
which provides statistics about Ethernet-like interface types and which is part of the
dot3 group within the MIB-II Transmission group.
Additional private objects in the Ethernet Subagent's MIB defined by HP allow the
Ethernet Subagent to be monitored and managed through SNMP.
The interaction between the SNMP agent, the Ethernet Subagent, and the TCP/IP
subsystem whose Ethernet interfaces are being monitored is illustrated in
Architectural Overview of the Ethernet Subagent,

The Ethernet Subagent and Its Managed Resources

Each Ethernet Subagent monitors the Ethernet interfaces for one HP TCP/IP
subsystem. When you start the Ethernet Subagent, you define:
The TCP/IP subsystem whose Ethernet interfaces are to be monitored
The SCP process with which the Ethernet Subagent communicates
By default, the Ethernet Subagent monitors the TCP/IP process $ZTC0 running on the
local node, and communicates through the SCP process $ZNET.

The Ethernet Subagent and the SNMP Agent

Any SNMP agent process can communicate with only one Ethernet Subagent process.
Because each Ethernet Subagent can monitor only one TCP/IP subsystem, you must
start one SNMP agent/Ethernet Subagent pair for each TCP/IP subsystem whose
Ethernet interfaces you want to monitor.
You define the SNMP agent with which the Ethernet Subagent communicates when
you start the subagent. By default, the Ethernet Subagent communicates with the
SNMP agent $ZSNMP on the same node as the subagent.
SNMP Configuration and Management Manual—424777-006
on page 14-2.
14- 1
Figure 14-1,