Filter
Top Products
Fast EtherHub 3500 System User’s Guide
Setting Up Network Connections 3-3
Multiple Agents
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).
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.