Hi,
I have a couple of nexus 9372PX which are in VPC connected down stream to a few FEX 2248TP-E. One of the FEX's down link is continuously flapping since a couple of days continuously. Below are the necessary outputs of show commands. Please suggest what could be done.
Logs:
2018 May 7 11:47:00 sji23d-a641sds02 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet109/1/19 is down (Link failure)
2018 May 7 11:47:03 sji23d-a641sds02 %ETHPORT-5-SPEED: Interface Ethernet109/1/19, operational speed changed to 1 Gbps
2018 May 7 11:47:03 sji23d-a641sds02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet109/1/19, operational duplex mode changed to Full
2018 May 7 11:47:03 sji23d-a641sds02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet109/1/19, operational Receive Flow Control state changed to off
2018 May 7 11:47:03 sji23d-a641sds02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet109/1/19, operational Transmit Flow Control state changed to on
2018 May 7 11:47:03 sji23d-a641sds02 %ETHPORT-5-IF_UP: Interface Ethernet109/1/19 is up in mode access
2018 May 7 11:47:15 sji23d-a641sds02 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet109/1/19 is down (Link failure)
2018 May 7 11:47:18 sji23d-a641sds02 %ETHPORT-5-SPEED: Interface Ethernet109/1/19, operational speed changed to 1 Gbps
2018 May 7 11:47:18 sji23d-a641sds02 %ETHPORT-5-IF_DUPLEX: Interface Ethernet109/1/19, operational duplex mode changed to Full
2018 May 7 11:47:18 sji23d-a641sds02 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet109/1/19, operational Receive Flow Control state changed to off
2018 May 7 11:47:18 sji23d-a641sds02 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet109/1/19, operational Transmit Flow Control state changed to on
2018 May 7 11:47:18 sji23d-a641sds02 %ETHPORT-5-IF_UP: Interface Ethernet109/1/19 is up in mode access
sji23d-a641sds02# sh int e109/1/19
Ethernet109/1/19 is up
admin state is up,
Hardware: 100/1000 Ethernet, address: a055.4f83.aeb4 (bia a055.4f83.aeb4)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, medium is broadcast
Port mode is access
full-duplex, 1000 Mb/s
Beacon is turned off
Auto-Negotiation is turned on, FEC mode is Auto
Input flow-control is off, output flow-control is on
Auto-mdix is turned off
Switchport monitor is off
EtherType is 0x8100
Last link flapped 00:00:04
Last clearing of "show interface" counters never
526645 interface resets
30 seconds input rate 424 bits/sec, 0 packets/sec
30 seconds output rate 13752 bits/sec, 14 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 408 bps, 0 pps; output rate 12.83 Kbps, 13 pps
RX
0 unicast packets 4210946 multicast packets 734463 broadcast packets
4945409 input packets 404992984 bytes
0 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
40010 unicast packets 101929103 multicast packets 1543900 broadcast packets
103513013 output packets 12245231526 bytes
0 jumbo packets
0 output error 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
sji23d-a641sds02# sh run int e109/1/19
!Command: show running-config interface Ethernet109/1/19
!Time: Tue May 8 09:06:46 2018
version 7.0(3)I6(1)
interface Ethernet109/1/19
switchport access vlan 603
sji23d-a641sds02# show fex
FEX FEX FEX FEX
Number Description State Model Serial
------------------------------------------------------------------------
101 FEX0101 Online N2K-C2248TP-E-1GE FOX1922GQN0
102 FEX102 Online N2K-C2248TP-E-1GE FOX1922GQMR
103 FEX103 Online N2K-C2248TP-E-1GE FOX1922GQFX
109 FEX0109 Online N2K-C2248TP-E-1GE FOX1922GQG7
110 FEX110 Online N2K-C2248TP-E-1GE FOX1922GQJ7
112 FEX0112 Online N2K-C2248TP-E-1GE FOX1922GQKZ
