Juniper Networks ERX Hardware 8 - Manual (Page 126)

ERX 8.0.x Hardware Guide
Figure 47: SRP Module LEDs
Status LEDs
Status LEDs
OK
FAIL
ONLINE
REDUNDANT
POWER
A OK POWER B OK
FAN OK
FA
N FA
IL
LINK
ACTIVITY
g013768
NOTE: The primary SRP module illuminates the REDUNDANT LED only when the
SRP module detects a secondary or standby SRP module online. The standby SRP
module monitors an activity signal from the primary SRP module to determine its
state; it does not shadow the operations of the primary SRP module.
If the standby SRP module detects that the primary SRP module is not active (and
high-availability mode is not enabled), it reboots the system and takes control. If
high-availability mode has been enabled, automatic switchover occurs with near
hitless failover. (ERX-7xx and ERX-14xx models only)
108 Understanding Status LEDs to Troubleshoot