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Create an SNMP network channel

An SNMP agent communicates through a port that accepts UDP traffic and another port that accepts TCP traffic. By default, all TCP traffic uses the host server's listen port. For example, if you target this agent to a server named ManagedServer1 and ManagedServer1 listens for requests on port 7001, then the SNMP agent listens for TCP requests on port 7001. When communicating through a TCP port, WebLogic Server protects SNMP communication from denial of service (DOS) attacks.

If you want to separate SNMP TCP traffic from business traffic, you can create a custom network channel.

To create a custom network channel for SNMP, do the following on each WebLogic Server instance that hosts an SNMP agent:

  1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
  2. In the Administration Console, under Domain Structure, expand Environment and select Servers.
  3. On the Summary of Servers page, in the Servers table, click the name of a server that hosts an SNMP agent.
  4. On the Server: Configuration: General page, click the Protocols tab. Then click the Channels sub-tab.
  5. On the Servers: Protocols: Channels page, click the New button.
  6. In the Create a New Network Channel assistant:
    1. Enter a name for your network channel. The name is for your identification purposes only; it is not used when communicating with SNMP managers.
    2. In the Protocol list, select snmp.
    3. Click the Next button and complete the remaining steps of the assistant. For more information, see Configuration Options.
    4. When you have completed the assistant, click the Finish button.
  7. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
    Not all changes take effect immediately—some require a restart (see Use the Change Center).


Any SNMP agent that you target to this WebLogic Server instance will automatically use the SNMP network channel that you created.

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