Figure 342: Redundant Hcms; Table 161: Checklist For Monitoring Redundant Hcms; Redundant Hcms Overview - Juniper M Series Monitoring And Troubleshooting Manual

M Series and T Series Routers Monitoring and Troubleshooting Guide
Related
Documentation

Redundant HCMs Overview

736
Table 161: Checklist for Monitoring Redundant HCMs (continued)
Monitor Redundant HCM Tasks
"Verify HCM Failure" on page 740
Return an HCM
Redundant HCMs Overview on page 736
You monitor and maintain HCMs on the M10i router so that they can monitor and control
router components, control component power-up and power-down, signal which Routing
Engine is master, display alarm conditions, and take PICs offline.
Two HCMs are installed in an M10i router. Each HCM works with a companion Routing
Engine.
Two HCMs are installed into the midplane from the front of the chassis, as shown in
Figure 342 on page 736. The master HCM performs all functions and provides PIC removal
buttons for the first Flexible PIC Concentrator (FPC). The standby HCM provides PIC
removal buttons for the second FPC. The HCM in the slot labeled
the Routing Engine in the slot labeled
paired with the Routing Engine in the slot labeled
labeled HCM0 is the master.

Figure 342: Redundant HCMs

When HCM mastership changes because of failure, Routing Engine mastership also
changes.
Command or Action
show chassis routing-engine
See "Perform A Swap Test" on page
Find the serial number ID label, then see
the Failed Component" on page 116
the HCM Serial Number ID Label" on page
. Likewise, the HCM in the slot labeled
RE0
. By default, the HCM in the slot
RE1
Copyright © 2012, Juniper Networks, Inc.
538.
"Return
and "Locate
541.
HCM0 is paired with
is
HCM1