If we enable tunnel services on a pic of an LC9600 linecard on an MX device the lt interfaces are not created

The command used is:

# set chassis fpc 1 pic 4 tunnel-services bandwidth 1g

# commit

If we do the same without the bandwidth stanza (set chassis fpc 1 pic 4 tunnel-services and commit) the lt-1/4/* is created and is displayed.

If we add the bandwidth 1g statement afterwards in a separate 2nd commit, the interfaces remain.

FPC 1      REV 38  750-114437  xxxxx JNP10K-LC9600

When the below configuration is committed in MX10008 with LC9600 card, lt* interface is not created on single commit.

labroot@R1# top show | compare

[edit chassis fpc 1]

+  pic 4 {

+    tunnel-services {

+      bandwidth 1g;

+    }

+  }

Commit succeeds:

labroot@R1# commit

re1:

configuration check succeeds

re0:

commit complete

re1:

commit complete

labroot@R1# run show interfaces lt?

Possible completions:

<interface-name>  Name of physical or logical interface <<<<<< No interfaces are shown here.

Delete the Bandwidth configuration and then retry:

labroot@R1# delete chassis fpc 1 pic 4 tunnel-services bandwidth

labroot@R1# top show | compare

[edit chassis fpc 1 pic 4 tunnel-services]

-  bandwidth 1g;

Commit succeeds:

labroot@R1# commit

re1:

configuration check succeeds

re0:

commit complete

re1:

commit complete

This time it works:

labroot@R1# run show interfaces lt?

Possible completions:

<interface-name>  Name of physical or logical interface

lt-1/4/0

lt-1/4/1

lt-1/4/2

lt-1/4/3 <<<<<< Interfaces shown here

Now if Bandwidth configuration is added again, the interfaces are still seen:

labroot@R1# set chassis fpc 1 pic 4 tunnel-services bandwidth 1g

labroot@R1# run show interfaces lt?

Possible completions:

<interface-name>  Name of physical or logical interface

lt-1/4/0

lt-1/4/1

lt-1/4/2

lt-1/4/3 <<<<<< Interfaces shown here

Please check the documentation which says that each port of LC9600 supports 10-Gbps, 25-Gbps, 40-Gbps, 100-Gbps, and 400-Gbps.

Interface support—MX10K-LC9600 is a fixed-port line card that can deliver a bandwidth of up to 9.6 Tbps. MX10K-LC9600 interoperates with existing MX Series line cards, such as MX10K-LC2101 and MX10K-LC480. The MX10K-LC9600 supports 12 Packet Forwarding Engines, each providing a maximum bandwidth of up to 800 Gbps. The line card supports six PICs, with four ports per PIC.

Each port supports 10-Gbps, 25-Gbps, 40-Gbps, 100-Gbps, and 400-Gbps interface speeds using different optics.

You can channelize the interfaces as follows:

• Four 10 GbE interfaces
• Four 25 GbE interfaces
• Two 100 GbE interfaces
• Four 100 GbE interfaces

https://www.juniper.net/documentation/us/en/software/junos/release-notes/21.4/junos-release-notes-21.4r1/topics/new-features/feature-descriptions/hardware-2.html

1 GB speed is not supported on the ports which is the reason we are facing the issue with the configuration of bandwidth:

+  pic 4 {

+      tunnel-services {

+          bandwidth 1g;

+      }

+  }

Configuring bandwidth 10g or any other supported value resolved the issue.