11-7
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 11 SNMP
SNMP Community Names
11.6 SNMP Community Names
You can provision community names for all SNMP requests from the SNMP Trap Destination dialog box
in CTC. (See the
“SNMP Support” section on page 11-3
.) In effect, SNMP considers any request valid
that uses a community name matching a community name on the list of provisioned SNMP trap
destinations. Otherwise, SNMP considers the request invalid and drops it.
If an SNMP request contains an invalid community name, the request silently drops and the MIB variable
snmpInBadCommunityNames increments. All MIB variables managed by the agent grant access to all
SNMP requests containing a validated community name.
11.7 SNMP Remote Monitoring
The ONS 15327 incorporates RMON to allow network operators to monitor the ONS 15327 E10/100-4
cards. This feature is not apparent to the typical CTC user, because RMON interoperates with an NMS.
However, with CTC you can provision the RMON alarm thresholds. (See the
Monitoring” section on page 11-7
.) CTC also monitors the five RMON groups implemented by the ONS
15327.
ONS 15327 RMON implementation is based on the IETF-standard MIB Request for Comments (RFC)
1757. The ONS 15327 implements five groups from the standard MIB: Ethernet Statistics, History
Control, Ethernet History, Alarm, and Event.
11.7.1 Ethernet Statistics Group
The Ethernet Statistics group contains the basic statistics for each monitored subnetwork in a single table
named etherstats.
11.7.2 History Control Group
The History Control group defines sampling functions for one or more monitor interfaces. RFC 1757
defines the historyControlTable.
11.7.3 Ethernet History Group
The ONS 15327 implements the etherHistoryTable as defined in RFC 1757, within the bounds of the
historyControlTable.
11.7.4 Alarm Group
The Alarm group consists of a single alarm table. This table provides the network performance alarm
thresholds for the network management application. With CTC, you can provision the thresholds in the
table.
Summary of Contents for ONS 15327
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Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...