Maintaining the EX9253 Routing Engine
Removing a Routing Engine from an EX9253 Switch
The Routing Engine (RE) in an EX9253 switch is a hot-removable
and hot-insertable field-replaceable unit (FRU). You can remove and
replace it while the switch is running without turning off power to
the switch or disrupting switching functions if RE graceful switchover
is configured in the CLI. The REs are installed on the front panel.
At least one RE must be installed in the switch. To ensure proper
operation of the switch, you must install a replacement RE shortly
after removing an RE from the chassis. The REs are installed in the
slots labeled RE0
and RE1
on the front panel of the chassis.
Do not leave the RE slot empty for a long time while the switch is operational. Either replace the RE promptly or install a cover panel over the empty slot.
Before you begin to remove an RE:
Ensure you understand how to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).
Ensure that you have the following parts and tools available:
An ESD wrist strap
A replacement RE or a cover panel for the RE slot
To remove an RE from an EX9253 switch (see Figure 1):
Take the RE offline by issuing one of the following commands:
To remove the primary RE:
user@switch>request vmhost halt
To remove the backup RE:
user@switch>request vmhost halt slot-number
You must specify the number of the slot in which the RE is installed—RE0 or RE1.
To remove both the REs:
user@switch>request vmhost halt routing-engine both
- Place an electrostatic bag or antistatic mat on a flat, stable surface.
- Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
- Open the ejector handle on the RE outward to unseat the RE.
- Grasp the ejector handle, and slide the RE about halfway
out of the chassis.
Figure 1: Removing an RE - Place one hand underneath the RE to support it, and slide it completely out of the chassis.
- Place the RE on the antistatic mat or into an antistatic bag.
- Either replace the RE promptly or install a cover panel over the empty slot.
Installing a Routing Engine in an EX9253 Switch
The Routing Engine (RE) in an EX9253 switch is a hot-removable
and hot-insertable field-replaceable unit (FRU). You can remove and
replace it while the switch is running without turning off power to
the switch or disrupting switching functions. The REs are installed
on the front panel. The REs are installed in the slots labeled RE0
and RE1
on the front panel of
the chassis.
Before you begin to install an RE:
Ensure you understand how to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).
Ensure that you have the following parts and tools available:
An ESD wrist strap
A Phillips (+) screwdriver, number 2
To install an RE:
- Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
- Taking care not to touch RE components, remove the RE from its bag.
- Lift the RE, and position it in the chassis with the faceplate facing you and the sides of the RE aligned with the guides in the RE slot on the switch chassis (see Figure 2).
- Slide the RE into the chassis until you feel resistance, carefully ensuring that it is correctly aligned.
- Grasp the ejector handle and gently slide the RE fully into the slot using both hands until the RE is fully seated.
- Verify that the
OK/FAIL
LED on the RE faceplate is lit steadily. If theOK/FAIL
LED is lit red, remove and install the RE again. - Check the status of the RE by issuing the CLI command show chassis routing-engine command:
user@host> show chassis routing-engine
Routing Engine status: Slot 0: Current state Master Election priority Master (default) Temperature 46 degrees C / 114 degrees F CPU temperature 46 degrees C / 114 degrees F DRAM 49103 MB (49152 MB installed) Memory utilization 6 percent 5 sec CPU utilization: User 1 percent Background 0 percent Kernel 1 percent Interrupt 0 percent Idle 99 percent 1 min CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 99 percent 5 min CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 99 percent 15 min CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 99 percent Model EX9253-RE Start time 2018-04-29 20:19:29 PDT Uptime 56 days, 10 hours, 22 minutes, 39 seconds Last reboot reason 0x2000:hypervisor reboot Load averages: 1 minute 5 minute 15 minute 0.08 0.14 0.15 0.08 0.14 0.15 Routing Engine status: Slot 1: Current state Backup Election priority Backup (default) Temperature 45 degrees C / 113 degrees F CPU temperature 45 degrees C / 113 degrees F DRAM 49103 MB (49152 MB installed) Memory utilization 3 percent 5 sec CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 100 percent Model EX9253-RE Start time 2018-05-24 02:26:20 PDT Uptime 32 days, 4 hours, 15 minutes, 34 seconds Last reboot reason 0x2000:hypervisor reboot Load averages: 1 minute 5 minute 15 minute 0.03 0.05 0.07
Figure 2: Installing an RE