Rockwell-automation 1785-ENET USER MANUAL PLC-5 ETHERNET INTERFACE Manuale Utente Scaricare il pdf (Pagina 45)

1785-6.5.19 November 1998

Appendix

SNMP Management Information Base

(MIB) II Data Groups

Simple Network Management Protocol (SNMP) specifies the

diagnostic data that a host computer must maintain for a network

management software to access. Hosts typically keep statistics on the

status of their network interfaces, incoming and outgoing traffic,

dropped datagrams, and error messages generated. Network

management protocols let network management software access

these statistics.

MIB II is the SNMP standard for the management of network data.

The following tables list the MIB II data items and their definitions.

Group: MIB: Description:

System sysDescr description of device

sysObjectID identity of agent software

sysUpTime how long ago the agent started

sysName device name

sysServices services offered by the device

Interfaces ifIndex interface number

ifDescr description of the interface

ifType type of interface

ifMTU MTU size

ifSpeed transmission rate in bits/second

ifPhysAddress media specific address

ifAdminStatus desired interace state

ifOperStatus current interface state

ifLastChange how long ago interface changes state

ifInOctets total octets received from the data

ifUcasPackets broadcast/multicast packets delivered above

ifInDiscards packets discarded due to resource limitations

ifInErrors packets discarded due to format

ifUnknownProtos packets destined for unknown protocols

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Rockwell-automation 1785-ENET USER MANUAL PLC-5 ETHERNET INTERFACE Manuale Utente Pagina 45