Symptom

After EPLD upgrade FEX HIF interface configuration is lost and reapplication of the configuration is unsuccessful. Configuration loss would be full or partial : STLD1-630-02.02-N9K-RU29(config-if)# show run int eth 103/1/1 interface Ethernet103/1/1 Only the running configuration would be missing, the configuration will still be present in the startup-config STLD1-630-02.02-N9K-RU29# show startup-config int eth 103/1/1 interface Ethernet103/1/1 shutdown switchport access vlan 60 spanning-tree port type edge no snmp trap link-status When the configuration is reapplied the accounting logs will suggest that the configuration was applied successfully. STLD1-630-02.02-N9K-RU29(config-if)# show accounting log | last 10 Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 (SUCCESS) Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 (SUCCESS) Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; shutdown (REDIRECT) Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; shutdown (SUCCESS) Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; switchport access vlan 60 (REDIRECT) Mon Oct 8 04:12:51 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; switchport access vlan 60 (SUCCESS) Mon Oct 8 04:12:52 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; spanning-tree port type edge (REDIRECT) Mon Oct 8 04:12:52 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; spanning-tree port type edge (SUCCESS) Mon Oct 8 04:12:52 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; no snmp trap link-status (REDIRECT) Mon Oct 8 04:12:52 2018:type=update:id=console0:user=admin:cmd=configure terminal ; interface Ethernet103/1/1 ; no snmp trap link-status (SUCCESS) STLD1-630-02.02-N9K-RU29(config-if)# However, no configuration will be present in the running config: STLD1-630-02.02-N9K-RU29(config-if)# show run int eth 103/1/1 interface Ethernet103/1/1 To confirm that the switch is affected by this bug, use the following command and look for the mentioned errors: show tech dme | grep ERROR 18-09-30 07:02:29.639 [27537] [exception_handling] [ERROR] [co=doer:0:0:0xf31:6] FATAL[5|0]: ../app_bi/svc/policyelem/src/./gen/ifc/beh/imp/l1/PhysIfBI.cc(297):postExplicitCb l1PhysIf[sys/intf/phys-[eth103/1/1]] : ERROR: invalid fex interface. (../dme/common/src/framework/./core/error/Report.cc:125) 18-09-30 07:02:29.639 [27537] [exception_handling] [ERROR] [co=doer:0:0:0xf31:6] ERROR[3|1] ../dme/common/src/framework/./core/proc/Doer.cc(1571):exceptionCB: exception encountered during processing: "ERROR: invalid fex interface." [1] ERROR: invalid fex interface. (../dme/common/src/framework/./core/error/Report.cc:136) 18-09-30 07:02:29.639 [27537] [tx] [INFO] [co=doer:0:0:0xf31:6] TX FAILED (../dme/common/src/framework/./core/mo/Transactor.cc:362)

Conditions

The issue is faced after upgrading to 7.0(3)I7(X) train, followed by an EPLD upgrade. As per show tech DME, the DME process is unable to find the interfaces and can't configure them correctly when the switch is brought up. As DME already has the configuration, reapplication of the configuration through CLI is not pushed to the HIF interfaces.

Workaround

1) Default interface and reapply configuration. 2) Remove fex and reconfigure the FEX again. 3) Remove all commands applied from the HIF interfaces by using "no" commands and reapply configuration.

Further Problem Description