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Configuring the Six-Input DC Power Supply

By default, the six-input DC power supply is configured to have all the six input feeds connected. You can also choose to provide four or five input feeds to the six-input DC power supply. When providing four or five input feeds on standalone routers, you need to configure the feeds statement at the [edit chassis pem] hierarchy level. When providing four or five input feeds to an LCC router in a routing matrix, you need to configure the feeds statement at the [edit chassis lcc lcc-number pem] hierarchy level.

Starting with Junos OS Release 12.3, the power management feature is enabled on T4000 routers with six-input DC power supply. The power management feature is enabled only when six input feeds with 40 amperes (A) each or four input feeds with 60 A each is configured on the router. To do this, you need to configure the feeds and input-current statements at the [edit chassis pem] hierarchy level.

Before configuring input feeds for your router, see the T640 Core Router Hardware Guide, T1600 Core Router Hardware Guide, or T4000 Core Router Hardware Guide for special considerations and for the number of input feeds supported by the router. The value assigned to the feeds statement must be equal to the number of input feeds provided to the power supply. Else, an alarm message is generated to indicate the mismatch.

The following procedures describe how to configure the six-input DC power supply on different routers:

Configuring the Six-Input DC Power Supply on an LCC Router in a Routing Matrix

1. At the [edit chassis lcc lcc-number pem] hierarchy level, configure the feeds statement with the number of input feeds provided to the power supply.
   [edit chassis lcc lcc-number pem]user@host# set feeds number-of-input-feeds

   For example:

   [edit chassis lcc 1 pem]user@host# set feeds 5

   Note: All power supplies in the router must use the same number of inputs feeds.

2. Verify the configuration by using the show command at the [edit chassis] hierarchy level:

   [edit chassis lcc 1 pem]
   user@host# show
   pem {
       feeds 5;
   }

Configuring the Six-Input DC Power Supply on T640 and T1600 Routers

1. At the [edit chassis pem] hierarchy level, configure the feeds statement with the number of input feeds provided to the power supply.
   [edit chassis pem]user@host# set feeds number-of-input-feeds

   For example:

   [edit chassis pem]user@host# set feeds 5

   Note: All power supplies in the router must use the same number of inputs feeds.

2. Verify the configuration by using the show command at the [edit chassis] hierarchy level:

   [edit chassis]
   user@host# show
   pem {
       feeds 5;
   }

Configuring the Six-Input DC Power Supply on T4000 Routers

1. At the [edit chassis pem] hierarchy level, configure the feeds statement with the number of input feeds provided to the power supply.
   [edit chassis pem]user@host# set feeds number-of-input-feeds

   For example:

   [edit chassis pem]user@host# set feeds 4

   Note: All power supplies in the router must use the same number of inputs feeds.

2. Configure the input current received by the router.
   [edit chassis pem]user@host# set input-current amps-in-each-feed

   For example, if the router receives 60 A of input current:

   [edit chassis pem]user@host# set input-current 60

   Note: You can connect three 80 A DC power cables to six-input DC power supply by using terminal jumpers. When you do this, ensure that you set the value of the feeds statement to 6 and that of the input current statement to 40. If these configurations are not set, the power management feature is not enabled. For more information about the power management feature, see T4000 Power Management Overview.

3. Verify the configuration by using the show command at the [edit chassis] hierarchy level:

   [edit chassis]
   user@host# show
   pem {
       feeds 4;
       input-current 60;
   }