Chapter 26: Monitoring the SFMs
The SFMs are hot-removable and hot-insertable. Inserting or removing an SFM causes a brief interruption in forwarding performance (about 500 ms) as the Packet
Forwarding Engine reconfigures the distribution of packets across the remaining
SFMs.
Monitoring the SFM Status
To monitor the SFM status, follow these steps:
Steps To Take 1.
Display the SFM Summary Status on page 349
2.
Display the SFM LED Status at the Command Line on page 351
3.
Check the SFM LED Status on the Faceplate on page 351
4.
Display the SFM Environmental Status on page 351
Step 1: Display the SFM Summary Status
Action To display the SFM summary status, use the following JUNOS software command-line interface (CLI) command: user@host> show chassis sfm
Sample Output user@host> show chassis sfm
Temp CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt DRAM (MB) Heap Buffer
0 Online 41 2 0 64 16 46
1 Offline --- Hard FPC error ---
2 Online 43 2 0 64 16 46
3 Online 44 2 0 128 7 46
What it Means The command output displays the SFM slot number: 0 , 1 , 2 , or 3 . The output also displays the operating status of each SFM as Online , Offline , or Empty .
In the sample output, the root cause of the SFM1 failure may be an FPC problem.
The command output displays the temperature of air passing by the SFM, in degrees Centigrade. It displays the SFM CPU usage, including the total percentage used by the SFM processor and the percentage used for interrupts.
The command output also displays the percentage of memory usage, including the total DRAM available to the SFM processor, in megabytes (MB), and the percentage of heap space (dynamic memory) being used by the SFM processor. Heap utilization greater than 80 percent can indicate a software problem (memory leak). The output shows the percentage of buffer space being used by the SFM processor for buffering internal messages.
Monitoring the SFM Status !
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