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Troubleshooting the Logical Disconnection of a Line-Card Chassis from the TX Matrix Plus Router

 

Problem:

Description:

The following changes can cause a line-card chassis (LCC)to be logically disconnected from the TX Matrix Plus router if the master and backup Routing Engines are running different Junos OS releases:

  • A host subsystem initiates a change in mastership to a backup Routing Engine in an LCC because the master Routing Engine has failed.

  • You initiate a change in mastership to a backup Routing Engine in an LCC and the on-loss-of-keepalives statement is not included at the [edit chassis redundancy failure] hierarchy level.

You initiate a change in mastership to the backup Routing Engine in the TX Matrix Plus router and the on-loss-of-keepalives statement is not included at the [edit chassis redundancy failure] hierarchy level—All an LCC are logically disconnected from the TX Matrix Plus router.

Solution

To reconnect an LCC to the routing matrix:

  • Initiate a change in mastership to the backup Routing Engine in the TX Matrix Plus router.

  • Replace the failed Routing Engine in the LCC and switch mastership to it. The replacement Routing Engine must be running the same software release as the master Routing Engine in the TX Matrix Plus router. See the T1600 Core Router Hardware Guide and T4000 Core Router Hardware Guide.

Switch mastership of all master Routing Engines in the LCCs to their backup Routing Engines.

Switch mastership of the new master Routing Engine in the LCC back to the original master Routing Engine.