On a PTX10008 running non-EVO code (22.4R3-S6.5) with an LC1101 line card(, after they configured two Mellanox QSA 10g adaptor in ports 8 and 9  and the other two 100g LR4 (740-061409) QSFPs in ports 6 and 7,

They found that  the 100g interfaces on ports 6 and 7 were disappeared.. 

Before it configured 1/0/8 and 1/0/9, both 1/0/6 and 1/0/7 were working well.

---------------------------------------------------
test-re0> show interfaces et-1/0/6
Physical interface: et-1/0/6, Enabled, Physical link is Up

test-re0> show interfaces et-1/0/7
Physical interface: et-1/0/7, Enabled, Physical link is Up

dbrennan@mrhgmort-wcr16c5-10008-re0> show interfaces et-1/0/8:0
error: device et-1/0/8:0 not found

dbrennan@mrhgmort-wcr16c5-10008-re0> show interfaces et-1/0/9:0
error: device et-1/0/9:0 not found

---------------------------------------------------
test-re0> show chassis hardware
Hardware inventory:
Item Version Part number Serial number Description
Chassis              XX666 JNP10008 [PTX10008]
<snipped>
FPC 1 REV XX 750-071976 XXXX6666 LC1101 - 30C / 30Q / 96X
CPU BUILTIN BUILTIN FPC CPU
PIC 0 BUILTIN BUILTIN 30x100GE/30x40GE/96x10GE
<SNIPPD>
Xcvr 6 REV 01 740-061409 PRLAC6883375 QSFP-100GBASE-LR4-T2
Xcvr 7 REV 01 740-061409 PRLAC6883355 QSFP-100GBASE-LR4-T2
Xcvr 8 NON-JNPR DM5216x1886 SFP+-10G-LR
Xcvr 9 NON-JNPR PRLC18x46341 SFP+-10G-LR
---------------------------------------------------

After it configured 1/0/8 and 1/0/9, both 1/0/6 and 1/0/7 became "not found"

---------------------------------------------------
test-re0# delete chassis fpc 1 pic 0 port 8 speed 10g

[edit]
test-re0# delete chassis fpc 1 pic 0 port 9 speed 10g

[edit]
test-re0# commit and-quit
re0:
configuration check succeeds
re1:
commit complete
re0:
commit complete
Exiting configuration mode

---------------------------------------------------

test-re0> show interfaces et-1/0/6
error: device et-1/0/6 not found

test-re0> show interfaces et-1/0/7
error: device et-1/0/7 not found

test-re0> show interfaces et-1/0/8:0
Physical interface: et-1/0/8:0, Enabled, Physical link is Up

test-re0> show interfaces et-1/0/9:0
Physical interface: et-1/0/9:0, Enabled, Physical link is Up

---------------------------------------------------

This is  a port limitation on this module LC1101 - 30C / 30Q / 96X.

On the current LC1101, 6 , 7 ,16, 17, 26, 27 belong to Non-10g-capbable ports.

"When at least one 10G port exists on a PE Chip, then the non-10G capable port on that PE Chip will be disabled and the corresponding IFD will be deleted"

As you know that 0,2,4,6,8 ports are on PECHIP0 and 1,3,5,7,9  ports are on PECHIP1.

So whenever you configured QSA 10G on port 8/9, it would affect port 6 and 7 which works as " non-10g-capbable", then you found the symptom that both 1/0/6 and 1/0/7 became "not found".

There are 6 PECHIPs on LC1101 - 30C / 30Q / 96X.

Reference link:

https://www.juniper.net/documentation/us/en/hardware/ptx10008/topics/topic-map/ptx10008-line-card-components.html

------The Key Clarification---------

The port behavior is tied to the ASIC associated with the port. To channelize a 40GbE port to 4 independent 10GbE ports, you must configure each port individually. For example, ASIC PE0 maps to ports 0, 2, 4, 6, and 8. The fourth port, port 6, is disabled

------------------------------------

2026-01-02 : Article Created

2026-01-02 : Article Modified.