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OPERATIONAL DEFECT DATABASE
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Packets ingressing the Nexus 9200/9300 switch and tagged with native-vlan when egressing out of the interface are encapsulated with dot1q header. The port-channel interface from which the packets are forwarded out is a layer 2 trunk port-channel which allows only native vlan.
This condition is specific to interfaces configured after an interface is associated to the FEX fabric
. This interface is configured as fex-fabric port and the port-channel which is forwarding the packets is a newly created port-channel configured after fex-fabric port has been configured. interface EthernetX/Y description FEX switchport mode fex-fabric <<< switchport access vlan XXX fex associate XXX spanning-tree port type edge no snmp trap link-status no shutdown ** Interface does not have to be in an operational state to cause this condition. This issue is specific to following models of Nexus 9200/9300 Switches Nexus 93180YC Nexus 92160YC N9K-C9272Q N9K-C9236C N9K-C92304QC N9K-C92300YC N9K-C9232C N9K-C93108TC-EX N9K-C93180LC-EX Line cards N9K-X9732C-EX N9K-X9736C-EX N9K-X9732C-EXM N9K-X97160YC-EX
Note: In the below options, e1/17 is only noted for reference. The actual fex-fabric port impacted is could be different on different types of Nexus 9200/9300 switches. The calculation of finding out the impacted port is found out by collecting output of
. Please see
to further explain how to calculate the impacted fex-fabric port. Option 1: (recommended) ++ Relocate FEX to interface other than eth 1/17 ++ Bounce the impacted interface Option 2: (see note) ++ Remove switchport mode fex-fabric from eth 1/17 ++ Bounce the impacted interface ++ Re-apply switchport mode fex-fabric to eth 1/17 ** This is a more temporary workaround as any interface programmed after eth 1/17 is configured with switchport mode fex-fabric will be impacted. EG: interface eth 1/17 switchport mode access interface port-channel 44 shut no shut interface eth 1/17 switchport mode fex-fabric Option 3: - Configure the port-channel in Access mode.
Use the command
to find the port where
values are 0/0/0. The Columns in the above command are, Unit- Column 4, Slice- Column 9, Sport- Column 10. 'show interface hardware-mappings' Legends: SMod - Source Mod. 0 is N/A Unit - Unit on which port resides. N/A for port channels <<< HPort - Hardware Port Number or Hardware Trunk Id: HName - Hardware port name. None means N/A FPort - Fabric facing port number. 255 means N/A NPort - Front panel port number VPort - Virtual Port Number. -1 means N/A Slice - Slice Number. N/A for BCM systems <<< SPort - Port Number wrt Slice. N/A for BCM systems <<< SrcId - Source Id Number. N/A for BCM systems MacIdx - Mac index. N/A for BCM systems MacSubPort - Mac sub port. N/A for BCM systems ---------------------------------------------------------------------------------------- Name Ifindex Smod Unit HPort FPort NPort VPort Slice SPort SrcId MacId MacSP ---------------------------------------------------------------------------------------- Eth1/1 1a000000 1 0 16 255 0 -1 0 16 32 4 0 Eth1/2 1a000200 1 0 17 255 4 -1 0 17 34 4 2 Eth1/3 1a000400 1 0 18 255 8 -1 0 18 36 4 4 Eth1/4 1a000600 1 0 19 255 12 -1 0 19 38 4 6 Eth1/5 1a000800 1 0 12 255 16 -1 0 12 24 3 0 Eth1/6 1a000a00 1 0 13 255 20 -1 0 13 26 3 2 Eth1/7 1a000c00 1 0 14 255 24 -1 0 14 28 3 4 Eth1/8 1a000e00 1 0 15 255 28 -1 0 15 30 3 6 Eth1/9 1a001000 1 0 8 255 32 -1 0 8 16 2 0 Eth1/10 1a001200 1 0 9 255 36 -1 0 9 18 2 2 Eth1/11 1a001400 1 0 10 255 40 -1 0 10 20 2 4 Eth1/12 1a001600 1 0 11 255 44 -1 0 11 22 2 6 Eth1/13 1a001800 1 0 4 255 48 -1 0 4 8 1 0 Eth1/14 1a001a00 1 0 5 255 52 -1 0 5 10 1 2 Eth1/15 1a001c00 1 0 6 255 56 -1 0 6 12 1 4 Eth1/16 1a001e00 1 0 7 255 60 -1 0 7 14 1 6 Eth1/17 1a002000 1 0 0 255 64 -1 0 0 0 0 0 <<<< Eth1/18 1a002200 1 0 1 255 68 -1 0 1 2 0 2 Eth1/19 1a002400 1 0 2 255 72 -1 0 2 4 0 4 Eth1/20 1a002600 1 0 3 255 76 -1 0 3 6 0 6 Eth1/21 1a002800 1 0 60 255 80 -1 1 20 40 14 0 Eth1/22 1a002a00 1 0 61 255 84 -1 1 21 42 14 2 Eth1/23 1a002c00 1 0 62 255 88 -1 1 22 44 14 4 Eth1/24 1a002e00 1 0 63 255 92 -1 1 23 46 14 6 Eth1/25 1a003000 1 0 56 255 96 -1 1 16 32 13 0 Eth1/26 1a003200 1 0 57 255 100 -1 1 17 34 13 2 Eth1/27 1a003400 1 0 58 255 104 -1 1 18 36 13 4 Eth1/28 1a003600 1 0 59 255 108 -1 1 19 38 13 6 Eth1/29 1a003800 1 0 52 255 112 -1 1 12 24 12 0 Eth1/30 1a003a00 1 0 53 255 116 -1 1 13 26 12 2 Eth1/31 1a003c00 1 0 54 255 120 -1 1 14 28 12 4 Eth1/32 1a003e00 1 0 55 255 124 -1 1 15 30 12 6 Eth1/33 1a004000 1 0 48 255 128 -1 1 8 16 11 0 Eth1/34 1a004200 1 0 49 255 132 -1 1 9 18 11 2 Eth1/35 1a004400 1 0 50 255 136 -1 1 10 20 11 4 Eth1/36 1a004600 1 0 51 255 140 -1 1 11 22 11 6 Eth1/37 1a004800 1 0 44 255 144 -1 1 4 8 10 0 Eth1/38 1a004a00 1 0 45 255 148 -1 1 5 10 10 2 Eth1/39 1a004c00 1 0 46 255 152 -1 1 6 12 10 4 Eth1/40 1a004e00 1 0 47 255 156 -1 1 7 14 10 6 Eth1/41 1a005000 1 0 76 255 160 -1 1 36 64 17 0 Eth1/42 1a005200 1 0 77 255 164 -1 1 37 66 17 2 Eth1/43 1a005400 1 0 78 255 168 -1 1 38 68 17 4 Eth1/44 1a005600 1 0 79 255 172 -1 1 39 70 17 6 Eth1/45 1a005800 1 0 36 255 176 -1 0 36 64 8 0 Eth1/46 1a005a00 1 0 37 255 180 -1 0 37 66 8 2 Eth1/47 1a005c00 1 0 38 255 184 -1 0 38 68 8 4 Eth1/48 1a005e00 1 0 39 255 188 -1 0 39 70 8 6 Eth1/49 1a006000 1 0 72 255 192 -1 1 32 56 16 0 Eth1/50 1a006200 1 0 40 255 196 -1 1 0 0 9 0 Eth1/51 1a006400 1 0 32 255 200 -1 0 32 56 7 0 Eth1/52 1a006600 1 0 64 255 204 -1 1 24 48 15 0 Eth1/53 1a006800 1 0 20 255 208 -1 0 20 40 5 0 Eth1/54 1a006a00 1 0 24 255 212 -1 0 24 48 6 0