Juniper M Series Monitoring And Troubleshooting Manual page 4

M Series and T Series Routers Monitoring and Troubleshooting Guide
Part 2
Chapter 3
Part 3
Chapter 4
iv
TX Matrix Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
TX Matrix Router Major Hardware Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
TX Matrix Plus Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
TX Matrix Plus Router Major Hardware Components . . . . . . . . . . . . . . . . . . . . . . . 45
Methodology and Tools for Monitoring Router Components
Method and Tools for Monitoring Router Components . . . . . . . . . . . . . . . . . 51
Basic Router Component Monitoring Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Basic Router Component Monitoring Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Common Operational Mode Commands To Monitor Router Components . . . . . . 56
Using the Basic Monitoring Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Check the Router Component Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Check the Router Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Check the Component LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Display Detailed Component Environmental Information . . . . . . . . . . . . . . . 65
Display Detailed Component Operational Information . . . . . . . . . . . . . . . . . 66
Gather Component Alarm Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Display the Current Router Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Display Error Messages in the Messages Log File . . . . . . . . . . . . . . . . . . . . . . 112
Display Error Messages in the Chassis Daemon Log File . . . . . . . . . . . . . . . . . 113
Verify the Component Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Fix the Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Contact JTAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Return the Failed Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Monitoring Key and Common Router Components
Monitoring Key Router Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Understanding Key Router Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Packet Forwarding Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Data Flow Through the Router Packet Forwarding Engine . . . . . . . . . . . . . . . . . . 122
Data Flow Through the M5 and M10 Router Packet Forwarding Engine . . . . 122
Data Flow Through the M7i Router Packet Forwarding Engine . . . . . . . . . . . 123
Data Flow Through the M10i Router Packet Forwarding Engine . . . . . . . . . . 124
Data Flow Through the M20 Router Packet Forwarding Engine . . . . . . . . . . 125
Data Flow Through the M40 Router Packet Forwarding Engine . . . . . . . . . . 126
Data Flow Through the M40e Router Packet Forwarding Engine . . . . . . . . . 127
Data Flow Through the M120 Router Packet Forwarding Engine . . . . . . . . . . 128
Data Flow Through the M160 Router Packet Forwarding Engine . . . . . . . . . 128
Data Flow Through the M320 Router Packet Forwarding Engine . . . . . . . . . 129
Data Flow Through the T320, T640, and T1600 Router Packet Forwarding
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Data Flow Through the TX Matrix Router Packet Forwarding Engine . . . . . . 133
Data Flow Through the TX Matrix Plus Router Packet Forwarding Engine . . 135
Routing Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Routing Engine Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
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