Specifications

Cisco ONS 15327 Product Overview
Network Management
32
Cisco ONS 15327 Product Overview, R3.3
June 2002
Simple Network Management Protocol
Simple Network Management Protocol (SNMP) is an application-layer Internet
Protocol (IP) that enables network devices to exchange management information.
Network administrators can manage network performance, find and solve network
problems, and plan for network growth. The ONS 15327 supports SNMP Version
1 (SNMPv1) and SNMP Version 2c (SNMPv2c); SNMPv2c offers additional
protocol operations.
The ONS 15327 uses SNMP to communicate segments of the CTC information
model to network management systems, such as HP OpenView Network Node
Manager (NNM) or Open Systems Interconnection (OSI) NetExpert. SNMP
conveys information required for node-level inventory, fault, and performance
management of the ONS 15327 node, and for generic read-only management of
DS-1, DS-3, SONET, and Ethernet technologies.
The ONS 15327 incorporates SNMP Remote Monitoring (RMON) to allow
network operators to monitor the ONS 15327 E10/100-4 (Ethernet) cards. RMON
operates transparently with a network management application, but you can
provision RMON alarm thresholds with CTC.
Proxy ARP
Proxy Address Resolution protocol (ARP) enables a LAN-connected gateway
ONS 15327 to automatically handle ARP requests for remote non-LAN ONS
15327s connected by a DCC to the gateway ONS 15327. Proxy ARP requires no
manual configuration in CTC.
Proxy ARP has a single LAN-connected ONS 15327 stand in (proxy) for remote
ONS 15327s. If a device on the LAN sends an ARP request intended for one of
the DCC-connected ONS 15327s, the gateway ONS 15327 returns its own MAC
address to the LAN device. The LAN device then sends the datagram intended for
the remote ONS 15327 to the MAC address of the proxy ONS 15327. The proxy
ONS 15327 forwards this data to the remote 15327 using its own ARP table.