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Configuring a Consistent Management IP Address

On routers with multiple Routing Engines, each Routing Engine is configured with a separate IP address for the management Ethernet interface. To access the master Routing Engine, you must know which Routing Engine is active and use the appropriate IP address.

Optionally, for consistent access to the master Routing Engine, you can configure an additional IP address and use this address for the management interface regardless of which Routing Engine is active. This additional IP address is active only on the management Ethernet interface for the master Routing Engine. During switchover, the address moves to the new master Routing Engine.

Note: For M Series, MX Series, and most T Series routers, the management Ethernet interface is fxp0. For TX Matrix Plus routers and T1600 routers configured in a routing matrix, the management Ethernet interface is em0.

Note: Automated scripts that you have developed for standalone T1600 routers (T1600 routers that are not in a routing matrix) might contain references to the fxp0 management Ethernet interface. Before reusing the scripts on T1600 routers in a routing matrix, edit the command lines that reference the fxp0 management Ethernet interface so that the commands reference the em0 management Ethernet interface instead.

To configure an additional IP address for the management Ethernet interface, include the master-only statement at the [edit groups] hierarchy level.

In the following example, IP address 10.17.40.131 is configured for both Routing Engines and includes a master-only statement. With this configuration, the 10.17.40.131 address is active only on the master Routing Engine. The address remains consistent regardless of which Routing Engine is active. IP address 10.17.40.132 is assigned to fxp0 on re0, and address 10.17.40.133 is assigned to fxp0 on re1.

[edit groups re0 interfaces fxp0]unit 0 {family inet {address 10.17.40.131/25 {master-only;}address 10.17.40.132/25;}}[edit groups re1 interfaces fxp0]unit 0 {family inet {address 10.17.40.131/25 {master-only;}address 10.17.40.133/25;}}

This feature is available on all routers that include dual Routing Engines. On the TX Matrix router, this feature is applicable to the switch-card chassis (SCC) only.

 

Related Documentation

 

Published: 2012-12-11

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