Accton Technology 12i, 12mi SNMP manual Multiple Agents

Fast EtherHub 3500 System User’s Guide

The on-board configuration program only provides access to the private MIB. To gain full SNMP functionality, you must use optional network management software (e.g., AccView/Open).

Multiple Agents

You may include multiple agents in a stack. To provide a fail- safe backup management agent, include it in the same segment with the Master agent. You may also use several active agents in the same stack. However, they must be attached to different segments and have unique IP addresses.

SNMP Backup Agent

The Fast EtherHub 3500 system supports a backup function for the management agent. This special function allows the stack to have two or more SNMP network management agents attached to the same segment, wherein one agent is configured as the Master agent and the other(s) as a Slave (i.e., Backup) agent.

The agent in slave mode behaves as a Fast EtherHub-12i. But if the Master agent fails, the Slave agent takes over its functions using the latest data mirrored from the Master, including its IP address. Note that to manage the stack out-of-band after the Slave has assumed control, you must plug your PC or modem into the Serial port of the Slave agent. If you are using optional network management software, just ensure that your network management station can access the new control agent via its current network connection.

Note: Placing redundant agents in a segment will cause the system to set the agent with longest up-time as the Master, and the other(s) as a slave. If more than one slave exists in a segment, the slave higher up in the FlexBus chain will be chosen to function as the Master if it fails.

Setting Up Network Connections 3-3