Symptom

Nexus 9K device crash due to FPGA WATCHDOG Check the output of the commands below to confirm the same: N9K#show logging onboard stack-trace [4322193.075963] [1531683159] NMI due to FPGA WATCHDOG <<<<<<< [4322193.134075] cctrl DBG: cctrl_ow_write dev_type 5 data 4f [4322193.135114] cctrl DBG: cctrl_ow_write dev_type 5 data 4f [4322193.135116] CCTRL PANIC DUMP [4322193.135117] ========================= [4322193.135119] WDT last punched at 1531683159 [4322193.135122] REG(0x300) = 0 [4322193.135124] REG(0x304) = 0 [4322193.135125] ========================= [4322193.135127] [1531683159] Kernel panic - not syncing: WATCHOG HIT The current EPLD firmware version can be checked with the command: show version module 1 epld NOTE: Upgrading the NX-OS alone is not sufficient. EPLD must be upgraded if older than 7.0(3)I2(2b). To get the fix for this issue, it is recommended to upgrade the EPLD to 7.0(3)I2(2b) onwards. On the following link we have the process of EPLD upgrade: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/epld_rn/guide/nxos_n9K_epldRN_703i72.html

Conditions

N9K-C93180YC-EX as well as other Nexus 9K platforms are also affected. EPLD version older than 7.0(3)I2(2b)

Workaround

There are no workarounds available. Please proceed with the EPLD upgrade to 7.0(3)I2(2b) and onwards to address this.

Further Problem Description