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XG430 10G Flexi Port link not coming up - replacement of the module

During HA-Rebuild and Upgrade to 19.5.1 I noticed a log in System logs: "PortA4 up" on the peer node at a time when it was unexpected.

I then noticed on the physical interface, that the LED of that Port were off while the other 3 were blinking.

It is 10G Copper with SFP Plus Cable.

I replaced the cable with the same result. After 15 or more minutes I checked the device again and the port was up and running - as can be seen from the below output and screenshots.

I checked the Troubleshooting tests for network issues, but I found no log information or debug procedere else than this one: https://support.sophos.com/support/s/article/KB-000036345?language=en_US

Are there useful logs to analyze this?

This was the port status when it was off:

PortA3    Link encap:Ethernet  HWaddr C8:4F:86:FC:00:0D  
          inet6 addr: fe80::ca4f:86ff:fefc:d/64 Scope:Link
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:772884 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1243396 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:447511125 (426.7 MiB)  TX bytes:782974630 (746.7 MiB)

PortA4    Link encap:Ethernet  HWaddr C8:4F:86:FC:00:0D  
          inet6 addr: fe80::ca4f:86ff:fefc:e/64 Scope:Link
          UP BROADCAST SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

and than when it was on.

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XG430_WP02_SFOS 19.5.1 MR-1-Build278 HA-Primary# ifconfig PortA4
PortA4    Link encap:Ethernet  HWaddr C8:4F:86:FC:00:0D
          inet6 addr: fe80::ca4f:86ff:fefc:e/64 Scope:Link
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:7259882 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8158434 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5353399207 (4.9 GiB)  TX bytes:7343072503 (6.8 GiB)

XG430_WP02_SFOS 19.5.1 MR-1-Build278 HA-Primary# ifconfig PortA3
PortA3    Link encap:Ethernet  HWaddr C8:4F:86:FC:00:0D
          inet6 addr: fe80::ca4f:86ff:fefc:d/64 Scope:Link
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:9608423 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6768176 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7102495310 (6.6 GiB)  TX bytes:1499533574 (1.3 GiB)

The 4 Ports are in a LACP LAG.

That is the problematic port:
XG430_WP02_SFOS 19.5.1 MR-1-Build278 HA-Primary# ethtool PortA4
Settings for PortA4:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x0000000f (15)
                               drv probe link timer
        Link detected: yes

One other Port:

XG430_WP02_SFOS 19.5.1 MR-1-Build278 HA-Primary# ethtool PortA3
Settings for PortA3:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x0000000f (15)
                               drv probe link timer
        Link detected: yes

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