ADDC device automation online cannot obtain address
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Network Topology
ADDC device automation online cannot obtain address
Problem Description
The ADDC device cannot obtain an address during automated onboarding, the controller (CTL) southbound address cannot be pinged on L3, and the DC container also cannot ping the controller (CTL) gateway on L3
Process Analysis
Troubleshooting approach:
(1) First configure an address of the same subnet on the switch that cannot obtain an address, and check whether it can communicate with the gateway address of the device on L3, which is the address of intvlan-in 254.
(2) If not, ping the gateway address of the L3 device in the DC container, and debug ARP packets on L3 simultaneously. Also open another window in the controller (CTL).
Capture packets on both the controller (CTL) backend and the L3 device. The controller (CTL) backend only captures ARP broadcast packets but no return ARP packets. The device receives the ARP broadcast and responds with ARP packets.
Solution
The investigation revealed an issue with the controller (CTL) member NIC. The bond0 of the controller (CTL) is functioning normally, but the BOOTROTO=yes and Onboot=no settings of the member NIC need to be changed to BOOTROTO=no and Onboot=yes.