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Maintain a Single Configuration File for Both Routing Engines

 

Purpose

For routers that support multiple Routing Engines, you can specify re0 and re1 as group names to ensure that the correct IP addresses are used for each Routing Engine and to maintain a single configuration file for both Routing Engines. It is important that the names of the Routing Engines correspond to a slot position because the names re0 and re1 are special group names that you must use for the Routing Engines to recognize which configuration statement to use. Routing Engine 0 must be in slot position 0 and must be named re0, and Routing Engine 1 must be in slot position 1 and must be named re1.

To maintain a single configuration file for both Routing Engines, follow these steps:



Configure the New Group

Purpose

Each re0 or re1 group typically contains, at a minimum, the configuration for the hostname and the management interface (fxp0). If each Routing Engine uses a different management interface, the group must also contain the configuration for the backup router and static routes.

Action

To configure the re0 and re1 groups, follow these steps:

  1. In configuration mode, go to the following hierarchy level:

  2. Configure the group:

    For example:

  3. To configure the management interface, go to the following hierarchy level:

  4. Include the following statement:

    For example:

  5. To configure the hostname, go to the following hierarchy level:

  6. Include the following statement:

    For example:

  7. Verify the configuration:

  8. Commit the configuration:

  9. Repeat Step 1 through Step 8 for the re1 group.

Meaning

The sample output in Step 7 shows that the re0 group contains the minimum configuration for a group, the hostname, and the management interface (fxp0). If each Routing Engine uses a different management interface, the group must also contain the configuration for the backup router and static routes.



Apply the New Group

Action

To apply the re0 group to maintain a single configuration file for both Routing Engines, follow these steps:

  1. In configuration mode, go to the top hierarchy level and include the following statement:

    For example:

  2. Verify the configuration:

  3. Commit the configuration:

Meaning

The sample output shows that each group, re0 and re1, has its own IP address that is used for each Routing Engine to maintain a single configuration file.