ACI APIC failed to discover directly connected leaf nodes

[clement_cheung]

I have successfully brought up the first APIC of an ACI fabric.  It is running 2.2(1o).  I have a pair of N938108TC-EX connected by the APIC, and managed to use lldp to detect them. Example below.  Just have no idea why I cannot see this new node discovered on APIC, not even to talk about switch registration/decommissioning.

APIC1# acidiag run lldptool in eth2-1
Chassis ID TLV
        MAC: 28:6f:7f:eb:16:56
Port ID TLV
        Local: Eth1/1
Time to Live TLV
        120
Port Description TLV
        Ethernet1/1
System Name TLV
        switch
System Description TLV
        Cisco Nexus Operating System (NX-OS) Software 12.2(1n)
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2020, Cisco Systems, Inc. All rights reserved.
System Capabilities TLV
        System capabilities:  Bridge, Router
        Enabled capabilities: Bridge, Router
Management Address TLV
        MAC: 28:6f:7f:eb:16:56
        Ifindex: 83886080
Cisco 4-wire Power-via-MDI TLV
        4-Pair PoE not supported
        Spare pair Detection/Classification not required
        PD Spare pair Desired State: Disabled
        PSE Spare pair Operational State: Disabled
Cisco Port Mode TLV
        0
Cisco Port State TLV
        2
Cisco Serial Number TLV
        FDO20451TY6
Cisco Model TLV
        N9K-C93108TC-EX
Cisco Firmware Version TLV
        n9000-12.2(1n)
Cisco Node Role TLV
        1
Cisco Node ID TLV
        0
Cisco Infra VLAN TLV
        2
End of LLDPDU TLV

[aleccham · Accepted solution]

Hey clementcheung,

Can you try acidiag touch clean, setup-clean-config.sh, reload on the your switch connected to APIC1. 

While thats rebooting on APIC run acidiag touch clean and acidiag reboot.

Also Can we check the date between the 2 box simply by running the date command on both APIC and Switch.

Also curious as to what LLDP shows from the leaf.

[clement_cheung · Accepted solution]

Hi Alec

Thanks for your suggestion.  After applying acidiag touch clean, setup-clean-config.sh, reload on the switches, auto-discovery was successful again.

All the switches are new and just unboxed. A bit strange that we need to clean up the config/status inside.

Anyway, many thanks for your help!! Appreciated it.