Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

TechLibrary
Navigation

Example: Configuring a Consistent IP Address for the Management Interface

On routers with multiple Routing Engines, each Routing Engine is configured with a separate IP address for the management interface (fxp0). 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 interface for the master Routing Engine. During switchover, the address moves to the new master Routing Engine.

In the following example, 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. Address 10.17.40.132 is assigned to fxp0 on re0, and 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 a routing matrix composed of the TX Matrix router, this feature is applicable to the switch-card chassis (SCC) only. Likewise, on a routing matrix composed of a TX Matrix Plus router, this feature is applicable to the switch-fabric chassis (SFC) only.

  • If you configure the same IP address for a management interface or internal interface such as fxp0 and an external physical interface such as ge-0/0/1, when graceful Routing Engine switchover (GRES) is enabled, the CLI displays an appropriate commit error message that identical addresses have been found on the private and public interfaces. In such cases, you must assign unique IP addresses for the two interfaces that have duplicate addresses.
  • The management Ethernet interface used for the TX Matrix Plus router, T1600 routers in a routing matrix, and PTX Series Packet Transport Switches, is em0. Junos OS automatically creates the router’s management Ethernet interface, em0.
 

Related Documentation

 

Published: 2013-01-15

Previous Page Next Page