Juniper Networks MX240 manual Maintaining Packet Forwarding Engine Components, Maintaining DPCs

MX240 Ethernet Services Router Hardware Guide

user@host> show chassis environment cb 0

CB 0 status:
State	Online
Temperature Intake	66	degrees C / 150	degrees F
Temperature Exhaust A	67	degrees C / 152	degrees F
Temperature Exhaust B	73	degrees C / 163	degrees F

Power
1.2	V	1153	mV
1.5	V	1417	mV
1.8	V	1704	mV
2.5	V	2375	mV
3.3	V	3138	mV
5.0	V	4763	mV
1.2	V Rocket IO	1160	mV
1.5	V Rocket IO	1408	mV
1.8	V RLDRAM	1717	mV
I2C Slave Revision		15

For more information about using the CLI, see the JUNOS software manuals.

Maintaining Packet Forwarding Engine Components

For instructions on maintaining Packet Forwarding Engine components, see the following sections:

■Maintaining DPCs on page 72

■Maintaining DPC Cables on page 74

■Handling and Storing DPCs on page 74

Maintaining DPCs

The router can have up to three Dense Port Concentrators (DPCs) mounted horizontally in the DPC card cage at the front of the chassis, as shown in

Figure 1 on page 6. To maintain DPCs, perform the following procedures regularly:

■Check the LEDs on the craft interface directly above each DPC slot. The green LED labeled OK lights steadily when a DPC is functioning normally. For more information, see “DPC LEDs” on page 20.

■Check the OK/FAIL LED on the DPC. For more information, see Table 7 on page 10 and Table 8 on page 10. If the DPC detects a failure, the DPC sends an alarm message to the Routing Engine.

■Issue the CLI show chassis fpc command to check the status of installed DPCs. As shown in the sample output, the value Online in the column labeled State indicates that the DPC is functioning normally:

user@host> show chassis fpc
	Temp	CPU Utilization (%)		Memory	Utilization (%)
Slot	State	(C)	Total Interrupt		DRAM (MB) Heap		Buffer
0	Online	41	9	0	1024	15	57
1	Online	43	5	0	1024	16	57
2	Online	43	11	0	1024	16	57

72■ Maintaining Packet Forwarding Engine Components