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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 16 SNMP
16.8 SNMP Community Names
16.8 SNMP Community Names
Community names are used to group SNMP trap destinations. All ONS 15454 trap destinations can be
provisioned as part of SNMP communities in CTC. When community names are assigned to traps, the
ONS 15454 treats the request as valid if the community name matches one that is provisioned in CTC.
In this case, all agent-managed MIB variables are accessible to that request. If the community name does
not match the provisioned list, SNMP drops the request.
16.9 Proxy Over Firewalls
SNMP and NMS applications have traditionally been unable to cross firewalls used for isolating security
risks inside or from outside networks. CTC enables network operations centers (NOCs) to access
performance monitoring data such as RMON statistics or autonomous messages across firewalls by
using an SNMP proxy element installed on a firewall.
The application-level proxy transports SNMP protocol data units (PDU) between the NMS and NEs,
allowing requests and responses between the NMS and NEs and forwarding NE autonomous messages
to the NMS. The proxy agent requires little provisioning at the NOC and no additional provisioning at
the NEs.
The firewall proxy is intended for use in a gateway network element-end network element (GNE-ENE)
topology with many NEs through a single NE gateway. Up to 64 SNMP requests (such as get, getnext,
or getbulk) are supported at any time behind single or multiple firewalls. The proxy interoperates with
common NMS such as HP OpenView.
For security reasons, the SNMP proxy feature must be enabled at all receiving and transmitting NEs to
function. For instructions to do this, refer to the Cisco ONS 15454 Procedure Guide.
16.10 Remote Monitoring
The ONS 15454 incorporates RMON to allow network operators to monitor Ethernet card performance
and events. The RMON thresholds are user-provisionable in CTC. Refer to the Cisco ONS 15454
Procedure Guide for instructions.
Note Typical RMON operations, other than threshold provisioning, are invisible to the CTC user.
G
(cont.)
(8) cerent454AlarmObjectName The TL1-style user-visible name
that uniquely identifies an object
in the system.
(9) snmpTrapAddress The address of the SNMP trap.
Table 16-8 Supported ONS 15454 SNMPv2 Trap Variable Bindings (continued)
Group
Trap Name(s) Associated
with
Variable
Binding
Number SNMPv2 Variable Bindings Description