Verifying The Installation; Replacing Fan Trays - Juniper E Series Hardware Manual

Verifying the Installation

When you have replaced the SFPs and connected the cables, issue the
show interface gigabitEthernet command for each interface to check
that the interface is operational (up).

Replacing Fan Trays

A tray of cooling fans provides forced air cooling for components in the E-series
router. The fan trays are hot-swappable and can be replaced without powering
down the system. However, if you do not replace the fan tray within approximately
two minutes, the system enters thermal protection mode. For information about
thermal protection mode, see "Monitoring Temperatures of Modules" on page 109.
You can monitor fan status by observing the LEDs on the SRP module or
on the fan tray behind the faceplate. For complete LED information, see
"Understanding Status LEDs to Troubleshoot" on page 100.
NOTE: On the SRP module, when the LED alternates between OK and FAIL in
ten second intervals, a non-critical fan failure exists. Noncritical warnings are
not indicated on the fan tray LEDs; if the FAN FAIL LED is red, either a critical
or non-critical failure exists.
CAUTION: If the FAN FAIL LED on the SRP module is illuminated and none of
the fans are spinning when you remove the fan tray, power down the system
Field descriptions
gigabitEthernet interfaceSpecifier —Status of the hardware on this
interface
up—Hardware is operational
down—Hardware is not operational
Administrative status—Operational state that you configured for this
interface
up—Interface is enabled
down—Interface is disabled
Example
host1:vr2#show interfaces gigabitEthernet2/0
gigabitEthernet2/0 is Up, Administrative status is Up
Maintaining E-series Routers
93

Replacing Fan Trays