Summary

MX router failed to bring up the connection with non-Juniper optic even though the optic is listed on Juniper Hardware Compatibility Tool.

Scenario

Using a compatible non-Juniper 1G copper transceiver on MX204 router. MX204 can recognize the transceiver but it cannot auto-detect speed to 1G and the link is down on MX204. Switch is using a 1G copper transceiver and it shows connected.

root@mx204> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                FW015             JNP204 [MX204]
Routing Engine 0          BUILTIN      BUILTIN           RE-S-1600x8
CB 0             REV 44   750-069579   BCDM5140          JNP204 [MX204]
FPC 0                     BUILTIN      BUILTIN           MPC
  CPU            REV 02   750-066879   CAGC8782          MPC
  PIC 0                   BUILTIN      BUILTIN           4XQSFP28 PIC
  PIC 1                   BUILTIN      BUILTIN           8XSFPP PIC
    Xcvr 0       REV 01   740-021309   ADDB7F321823      SFP+-10G-LR
    Xcvr 3       |'       NON-JNPR     EA406284407       SFP-T
    Xcvr 7                NON-JNPR     EA406284404       SFP-T
PEM 0            REV 04   740-070749   1GG5C210425       JPSU-650W-AC-AO
PEM 1            REV 04   740-070749   1GG5C160910       JPSU-650W-AC-AO
Fan Tray 0                                               Fan Tray, Front to Back Airflow - AFO
Fan Tray 1                                               Fan Tray, Front to Back Airflow - AFO
Fan Tray 2                                               Fan Tray, Front to Back Airflow - AFO

root@mx204> show interfaces xe-0/1/7 brief
Physical interface: xe-0/1/7, Enabled, Physical link is Down
  Link-level type: Ethernet, MTU: 1514, MRU: 1522, LAN-PHY mode, Speed: 10Gbps,
  Loopback: None, Source filtering: Disabled, Flow control: Enabled,
  Speed Configuration: Auto
  Device flags   : Present Running Down
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
  Link flags     : None

  Logical interface xe-0/1/7.0
    Flags: Device-Down SNMP-Traps 0x4004000 Encapsulation: ENET2
    inet  10.10.10.1/24
    multiservice

On switch end shows up.

switch#sh int et11 status
Port       Name   Status       Vlan     Duplex Speed  Type         Flags Encapsulation
Et11              connected    112      a-full a-1G   1000BASE-T

Solution

Configure static speed 1G on MX204 interface.

set interfaces xe-0/1/7 gigether-options speed 1g

root@mx204> show interfaces xe-0/1/7 brief
Physical interface: xe-0/1/7, Enabled, Physical link is Up
  Link-level type: Ethernet, MTU: 1514, MRU: 1522, LAN-PHY mode, Speed: 10Gbps,
  Loopback: None, Source filtering: Disabled, Flow control: Enabled,
  Speed Configuration: 1G
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None

  Logical interface xe-0/1/7.0
    Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
    inet  10.10.10.1/24
    multiservice

switch#sh int et11 status
Port       Name   Status       Vlan     Duplex Speed  Type         Flags Encapsulation
Et11              connected    112      a-full a-1G   1000BASE-T

If static speed doesn't work with MTP cable scenario, it requires configuring 10G / 25G / 40G / 100G speed at chassis configuration session.

set chassis fpc 0 pic 0 port 0 speed 100g
set chassis fpc 0 pic 0 port 1 speed 100g
set chassis fpc 0 pic 0 port 2 speed 40g
set chassis fpc 0 pic 0 port 3 speed 40g
set chassis fpc 0 pic 1 port 0 speed 10g
set chassis fpc 0 pic 1 port 1 speed 10g
set chassis fpc 0 pic 1 port 2 speed 10g
set chassis fpc 0 pic 1 port 3 speed 10g
set chassis fpc 0 pic 1 port 4 speed 10g
set chassis fpc 0 pic 1 port 5 speed 10g
set chassis fpc 0 pic 1 port 6 speed 10g
set chassis fpc 0 pic 1 port 7 speed 10g

Please check the platform supports speed/throughput from the Juniper port checker before assigning speed.

After committing the config, FPC should restart by itself.

root@mx204> show chassis fpc pic-status
Slot 0   Online       MPC
  PIC 0  Ready        4XQSFP28 PIC
  PIC 1  Ready        8XSFPP PIC

If it doesn't restart for some reason, we can take it offline and online manually.

request chassis pic fpc-slot 0 pic-slot 0 offline
request chassis pic fpc-slot 0 pic-slot 0 online