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Maintain MX304 Interface Modules
Maintain LMICs
Purpose
The router can have up to three LMICs mounted horizontally in the card cage at the front of the chassis. For optimum router performance, verify the condition of the LMICs.
Action
On a regular basis:
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Check the OK/FAIL LED on the LMIC. If the LMIC detects a failure, the LMIC sends an alarm message to the Routing Engine.
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Issue the
show chassis fpc
CLI command to check the status of installed LMICs. As shown in the sample output, the value Online in the column labeled State indicates that the LMIC is functioning normally:user@host> show chassis fpc Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Online 36 6 0 5 5 5 32768 19 0
For more detailed output, add the detail option. The following example does not specify a slot number, which is optional:
user@host> show chassis fpc detail Slot 0 information: State Online Total CPU DRAM 32768 MB Total HBM 65536 MB FIPS Capable True Temperature 42 degrees C / 107 degrees F Start time 2022-05-30 08:00:24 IST Uptime 13 minutes, 13 seconds Max MPC base power consumption 1105 Watts Max MIC0 power consumption 95 Watts Max MIC1 power consumption 95 Watts Max MIC2 power consumption 95 Watts Max MPC total power consumption 1390 Watts PFE Information: PFE Power ON/OFF Bandwidth SLC 0 ON 800G 1 ON 800G 2 ON 800G 3 ON 800G 4 ON 800G 5 ON 800G
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Issue the
show chassis fpc mic-status
CLI command to check the status of the LMICs whenever you take the LMIC offline or online to ensure that the operation has completed before performing any further actions on the LMIC.user@host> show chassis fpc mic-status Slot 0 Online FPC-BUILTIN MIC 0 Offline MRATE LMIC 16x100G/4x400G MIC 1 Online MRATE LMIC 16x100G/4x400G PIC 1 Online MRATE LMIC 16x100G/4x400G MIC 2 Online MRATE LMIC 16x100G/4x400G PIC 2 Online MRATE LMIC 16x100G/4x400G
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Issue the
show chassis fpc pic-status
CLI command.user@host> show chassis fpc pic-status Slot 0 Online FPC-BUILTIN PIC 0 Offline MRATE LMIC 16x100G/4x400G PIC 1 Online MRATE LMIC 16x100G/4x400G PIC 2 Online MRATE LMIC 16x100G/4x400G
Note: For any LMIC-related operations such as LMIC insertion or removal, use theshow chassis fpc mic-status
command to check the status of the LMICs.
For further description of the output from the command, see the CLI Explorer.
Replace an MX304 LMIC
On the MX304 router, all the LMICs are removable. You can have up to three LMICs in the router.
The LMICs are located on the front side of the router. A typical LMIC weighs around 6.17 lb (2.8 kg). They are hot-swappable and can be gracefully removed and inserted using the CLI without impacting the other operational LMICs.
During the LMIC offline and online process:
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All subscribers hosted on the PFE are terminated, and their flows are deleted, except when redundancy is provided by an alternate PFE. DHCP subscribers remain connected even when the PFE is taken offline. When the LMIC comes back online, the pre-existing DHCP subscriber functionalities resume. Subscribers and flows are retained when an alternate PFE provides redundancy. See Subscriber Management Redundancy for PFE During Graceful OIR for more information.
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Port mirroring reacts to the hot-swap of LMICs in the following ways:
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If the Packet Forwarding Engine (PFE) hosting the output mirroring destination interface (MDI) goes offline, traffic from the input mirroring interface is not mirrored. Mirroring resumes when the PFE hosting the MDI comes back online.
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In a port-mirroring next-hop-group or next-hop-subgroup scenario, if a PFE hosting MDIs goes offline, the MDIs associated with the offline PFE are pruned from the member list. Those associated MDIs are added back to the member list when the PFE hosting the MDIs comes back online.
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If the PFE hosting the mirroring interface goes offline, traffic entering, leaving, and mirrored at the interface stops. Ingress and egress mainline traffic and mirroring resume when the PFE hosting the mirroring interface comes back online.
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Monitoring services such as inline active flow monitoring, inline monitoring services, video monitoring, Routing-Engine-based sampling, and FlowTapLite gracefully stop and restart when you take the LMIC offline and bring it back online.
Use the instructions in the following sections to remove and insert an LMIC on the MX304 router:
Remove an MX304 LMIC
To remove a LMIC (see Figure 1):
Install an MX304 LMIC
To install an LMIC (see Figure 2):
Maintain Cables That Connect to LMICs
Purpose
For optimum router performance, verify the condition of the cables that connect to the LMICs.
Action
On a regular basis:
Use the cable management brackets to support cables and prevent cables from coming unplugged or developing stress points.
Place excess cable out of the way in the cable management brackets. Do not allow fastened loops of cable to dangle from the connector or cable management brackets, because this stresses the cable at the fastening point. Putting fasteners on the loops helps to maintain their shape.
Keep the cable connections clean and free of dust and other particles, which can cause drops in the received power level. Always inspect cables and clean them if necessary before connecting an interface.
Label both ends of the cables to identify them.
The following guidelines apply specifically to fiber-optic cables:
When you unplug a fiber-optic cable, always place a rubber safety plug over the transceiver on the faceplate and on the end of the cable.
Anchor fiber-optic cables to avoid stress on the connectors. Be sure to secure fiber-optic cables so that they do not support their own weight as they hang to the floor. Never let fiber-optic cable hang free from the connector.
Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few inches can damage the cable and cause problems that are difficult to diagnose.
Frequent plugging and unplugging of fiber-optic cable into and out of optical instruments can cause damage to the instruments and is expensive to repair. Instead, attach a short fiber extension to the optical equipment. Any wear and tear due to frequent plugging and unplugging is then absorbed by the short fiber extension, which is easy and inexpensive to replace.
Keep fiber-optic cable connections clean. Small microdeposits of oil and dust in the canal of the transceiver or cable connector could cause loss of light, reducing signal power and possibly causing intermittent problems with the optical connection.
To clean the transceivers, use an appropriate fiber-cleaning device, such as RIFOCS Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the directions for the cleaning kit you use.
After you clean an optical transceiver, make sure that the connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free fiber-optic cable cleaning kit, such as the Opptex Cletop-S Fiber Cleaner. Follow the directions for the cleaning kit you use.
Replace a Cable on an MX304 LMIC
Remove a Cable on an LMIC
Removing and installing cables on an LMIC does not affect router function.
To remove a cable:
Install a Cable on an LMIC
To install a cable:
Replace an SFP, SFP+, or QSFP+ Transceiver
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.
Remove a Transceiver
Before you begin removing a transceiver from a device, ensure that you have taken the necessary precautions for the safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have the following parts and tools available:
An antistatic bag or an antistatic mat
Rubber safety caps to cover the transceiver and fiber-optic cable connector
A dust cover to cover the port or a replacement transceiver
After you remove a transceiver or when you change the media-type configuration, wait for 6 seconds for the interface to display the operational commands.
To remove a transceiver:
After removing a transceiver from the chassis, wait at least 30 seconds before reinserting it or inserting a transceiver into a different slot.
Install a Transceiver
Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have a rubber safety cap available to cover the transceiver.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
The Juniper Networks Technical Assistance Center (JTAC) provides complete support for Juniper-supplied optical modules and cables. However, JTAC does not provide support for third-party optical modules and cables that are not qualified or supplied by Juniper Networks. If you face a problem running a Juniper device that uses third-party optical modules or cables, JTAC may help you diagnose host-related issues if the observed issue is not, in the opinion of JTAC, related to the use of the third-party optical modules or cables. Your JTAC engineer will likely request that you check the third-party optical module or cable and, if required, replace it with an equivalent Juniper-qualified component.
Use of third-party optical modules with high-power consumption (for example, coherent ZR or ZR+) can potentially cause thermal damage to or reduce the lifespan of the host equipment. Any damage to the host equipment due to the use of third-party optical modules or cables is the users’ responsibility. Juniper Networks will accept no liability for any damage caused due to such use.
To install a transceiver:
Replace a QSFP28 Transceiver
28-Gbps quad small form-factor pluggable (QSFP28) transceivers are hot-insertable and hot-removable. Removing a QSFP28 transceiver does not interrupt router functioning, but the removed QSFP28 transceiver no longer receives or transmits data.
Remove a QSFP28 Transceiver
Before you begin to remove a transceiver from a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have the following parts and tools available:
An antistatic bag or an antistatic mat
Rubber safety caps to cover the transceiver and fiber-optic cable connector
A dust cover to cover the port or a replacement transceiver
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
To remove a QSFP28 transceiver (see Figure 5):
Install a QSFP28 Transceiver
Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have a rubber safety cap available to cover the transceiver.
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
The Juniper Networks Technical Assistance Center (JTAC) provides complete support for Juniper-supplied optical modules and cables. However, JTAC does not provide support for third-party optical modules and cables that are not qualified or supplied by Juniper Networks. If you face a problem running a Juniper device that uses third-party optical modules or cables, JTAC may help you diagnose host-related issues if the observed issue is not, in the opinion of JTAC, related to the use of the third-party optical modules or cables. Your JTAC engineer will likely request that you check the third-party optical module or cable and, if required, replace it with an equivalent Juniper-qualified component.
Use of third-party optical modules with high-power consumption (for example, coherent ZR or ZR+) can potentially cause thermal damage to or reduce the lifespan of the host equipment. Any damage to the host equipment due to the use of third-party optical modules or cables is the users’ responsibility. Juniper Networks will accept no liability for any damage caused due to such use.
To install a replacement QSFP28 transceiver (see Figure 6):
Replace a QSFP56-DD Transceiver
400-Gbps quad small form-factor pluggable (QSFP56-DD) transceivers are hot-insertable and hot-removable. The transceivers have four optical lanes that operate at 100Gbps PAM4 modulation, providing solutions up to 400 Gbps. They are compliant with the QSFP-DD MSA (DD = Double Density). Removing a QSFP56-DD transceiver does not interrupt router functioning, but the removed QSFP56-DD transceiver no longer receives or transmits data.
Remove a QSFP56-DD Transceiver
Before you begin to remove a transceiver from a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have the following parts and tools available:
-
An antistatic bag or an antistatic mat
-
Rubber safety caps to cover the transceiver and fiber-optic cable connector
-
A dust cover to cover the port or a replacement transceiver
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
To remove a QSFP56-DD transceiver (see Figure 7 ):
Install a QSFP56-DD Transceiver
Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have a rubber safety cap available to cover the transceiver.
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
The Juniper Networks Technical Assistance Center (JTAC) provides complete support for Juniper-supplied optical modules and cables. However, JTAC does not provide support for third-party optical modules and cables that are not qualified or supplied by Juniper Networks. If you face a problem running a Juniper device that uses third-party optical modules or cables, JTAC may help you diagnose host-related issues if the observed issue is not, in the opinion of JTAC, related to the use of the third-party optical modules or cables. Your JTAC engineer will likely request that you check the third-party optical module or cable and, if required, replace it with an equivalent Juniper-qualified component.
Use of third-party optical modules with high-power consumption (for example, coherent ZR or ZR+) can potentially cause thermal damage to or reduce the lifespan of the host equipment. Any damage to the host equipment due to the use of third-party optical modules or cables is the users’ responsibility. Juniper Networks will accept no liability for any damage caused due to such use.
To install a replacement QSFP56-DD transceiver (see Figure 7):
Maintain Active Optical Cables
An active optical cable (AOC) is an optical fiber cable that has a transceiver preattached to each end.
Disconnect an Active Optical Cable
Before you disconnect an active optical cable (AOC) from a device, ensure that you have taken the necessary precautions for safe handling of laser (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have the following parts and tools available:
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An antistatic bag or an antistatic mat to store the cable, if you are disconnecting the cable from all the ports it is connected to
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Rubber safety caps to cover the ports on the device, or a replacement cable
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Rubber safety caps to cover the transceivers at the ends of the cable
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An electrostatic discharge (ESD) grounding strap—not provided
To disconnect an active optical cable:
The procedure to disconnect other types of AOCs, other than direct attach AOCs, is the same as the procedure described in this topic.
Connect an Active Optical Cable
Before you connect an AOC to a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
To prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the end of the transceiver.
Ensure that you have an ESD grounding strap (not provided).
After you connect a cable or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only cables purchased from Juniper Networks with your Juniper Networks device.
If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.
To connect an active optical cable:
The procedure to connect other types of AOCs, other than direct attach AOCs, is the same as the procedure described in this topic.
Maintain Breakout Cables
Breakout cables have one transceiver preattached to one end and more than one transceiver preattached to the other end. You can use the cables to channelize a port and increase the number of interfaces. For example, you can channelize the QSFP28 ports on the front panel of MX304 by connecting breakout cables and by using CLI configuration when those ports are configured as network ports (see Port Speed on MX304 Router Overview).
Disconnect a Breakout Cable
Before you disconnect a breakout cable from a device, ensure that you have taken the necessary precautions for safe handling of laser (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have the following parts and tools available:
An antistatic bag or an antistatic mat to store the cable, if you are disconnecting the cable from all the ports it is connected to
Rubber safety caps to cover the ports on the device, or a replacement cable
Rubber safety caps to cover the transceivers at the ends of the cable
An electrostatic discharge (ESD) grounding strap—not provided
To disconnect a breakout cable:
The procedure to disconnect other types of breakout cables is the same as the procedure described in this topic.
Connect a Breakout Cable
To prevent ESD damage to the transceiver, do not touch the connector pins at the end of the transceiver.
If you are connecting an active optic breakout cable to a device, ensure that you have taken the necessary precautions for safe handling of laser (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have an electrostatic discharge (ESD) grounding strap (not provided).
After you connect a cable or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only cables purchased from Juniper Networks with your Juniper Networks device.
If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.
To connect a breakout cable:
The procedure to connect other types of breakout cables is the same as the procedure described in this topic.
Maintain Direct Attach Cables
A direct attach cable has a transceiver preattached to each end.
Disconnect a Direct Attach Cable
Ensure that you have the following parts and tools available:
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An antistatic bag or an antistatic mat to store the cable, if you are disconnecting the cable from both the ports it is connected to
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Rubber safety caps to cover the ports on the device, or a replacement cable
-
Rubber safety caps to cover the transceivers at the ends of the cable
-
An electrostatic discharge (ESD) grounding strap—not provided
To disconnect a direct attach cable:
The procedure to disconnect other types of direct attach cables, other than direct attach breakout cables, is the same as the procedure described in this topic.
Connect a Direct Attach Cable
To prevent ESD damage to the transceiver, do not touch the connector pins at the end of the transceiver.
Ensure that you have an ESD grounding strap (not provided).
After you connect a cable or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only cables purchased from Juniper Networks with your Juniper Networks device.
If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.
To connect a direct attach cable:
The procedure to connect other types of direct attach cables, other than direct attach breakout cables, is the same as the procedure described in this topic.