Cisco ONS 15454 SDH Specifications download pdf (Page 428)

11-8

Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 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 Network Monitoring

The ONS 15454 SDH incorporates Remote Network Monitoring (RMON) to allow network operators to

monitor the Ethernet cards. For more information on Ethernet RMONs, see the “Remote Monitoring

Specification Alarm Thresholds” section on page 9-51. 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. CTC also monitors the five RMON groups implemented by the ONS 15454 SDH.

AuthenticationFailure RFC1213-MIB Community string does not match

NewRoot RFC1493/

BRIDGE-MIB

Sending agent is the new root of the spanning tree

TopologyChange RFC1493/

BRIDGE-MIB

A port in a bridge has changed from Learning to

Forwarding or Forwarding to Blocking

EntConfigChange RFC2037/

ENTITY-MIB

The entLastChangeTime value has changed

ds1xLineStatusChange RFC2495/

DS1-MIB

A dsx1LineStatusChange trap is sent when the value of

an instance dsx1LineStatus changes. The trap can be

used by an NMS to trigger polls. When the line status

change results from a higher-level line status change (ex.

DS-3), no traps for the DS-1 are sent.

dsx3LineStatusChange RFC2496/

DS3-MIB

A dsx3LineStatusLastChange trap is sent when the value

of an instance of dsx3LineStatus changes. This trap can

be used by an NMS to trigger polls. When the line status

change results in a lower-level line status change (ex.

DS-1), no traps for the lower-level are sent.

risingAlarm RFC1757/

RMON-MIB

The SNMP trap that is generated when an alarm entry

crosses the rising threshold and the entry generates an

event that is configured for sending SNMP traps.

fallingAlarm RFC1757/

RMON-MIB

The SNMP trap that is generated when an alarm entry

crosses the falling threshold and the entry generates an

event that is configured for sending SNMP traps.

Table 11-4 Traps Supported in the ONS 15454 SDH (continued)

Trap From RFC# Description

1 2 ... 423 424 425 426 427 428 429 430 431 432 433 ... 503 504

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