Troubleshooting an EX8200 Line Card’s Failure to Power On

Problem

After you have installed a line card in an EX8200 switch, the line card fails to power on correctly. The ON LED on the line card is unlit or is not lit steadily.

Cause

• The line card is not seated correctly in the slot in the switch chassis.
• The switch does not have sufficient power supplies installed to power on the line card while maintaining its N+1 or N+N power configuration.
• The line card requires a particular minimum Junos OS release to power on, and that minimum release is not running on the switch.

Solution

• Ensure that the line card is installed correctly:

  Issue the show chassis fpc command. If the state of the line card in the CLI is Empty :

  1. Remove the line card (see Removing a Line Card from an EX8200 Switch).
  2. Reinstall the line card (see Installing a Line Card in an EX8200 Switch).
• Determine whether the switch has sufficient power to power on the line card while maintaining its N+1 or N+N power configuration. Use one of the following methods to determine this :
  • Issue the show chassis fpc command. If the state of the line card in the CLI is Offline and the line card description is No power, the switch does not have enough power to power on the line card. Install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
  • Determine the power requirement of the line card. See Power Requirements for EX8208 Switch Components or Power Requirements for EX8216 Switch Components. Then follow the item below that is appropriate for your switch’s software release:
    • If your switch is running Junos OS Release 10.2 or later, issue the show chassis power-budget-statistics command. If the value of the Total Power Available field is less than the power requirement of the line card, the switch does not have enough power to power on the line card. Install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
    • If your switch is running Junos OS Release 10.1 or earlier, calculate the total power available—see Calculating Power Requirements for an EX8208 Switch or Calculating Power Requirements for an EX8216 Switch. If the switch does not have enough power to power on the line card, install additional power supplies in the switch. See Installing an AC Power Supply in an EX8200 Switch or Installing a DC Power Supply in an EX8200 Switch.
• Determine whether the line card requires a particular minimum Junos OS release to power on:
  1. If your line card has a yellow label on the faceplate, a tag on the left ejector, and one of the following model number and part number combinations, it requires a particular Junos OS release to power on (see Figure 1):
     • EX8200-8XS, 750-046748
     • EX8200-40XS, 750-046750
     • EX8200-48F, 750-046751
     • EX8200-48T, 750-046749

     Figure 1: Locations of the Tag and the Label on the Line Card

     
  2. Upgrade your switch to one of the following Junos OS releases (see Understanding Software Installation on EX Series Switches) :
     • Junos OS Release 11.2—R1 and later
     • Junos OS Release 11.1—R2 and later
     • Junos OS Release 10.4—R5 and later

     Note: If you are running a release prior to Junos OS Release 10.4R5 on your EX8200 switch, see this page in our Knowledge Base: http://kb.juniper.net/KB21476 . This page lists recommended releases for EX Series switches.

  3. Reboot the switch to complete the upgrade process.

If the ON LED blinks in green but is not lit steadily:

• Tighten the captive screws on the faceplate of the line card to ensure that the line card is seated correctly in the slot in the switch chassis.