01-09-2020 01:14 PM
Hi Team,
I am observing input discard,CRC,and input errors on my nexus(Nexus 5696 ) interface.
sh int et2/5
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 5/255, rxload 1/255
0 runts 0 giants 15098 CRC 0 no buffer
15098 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 14335 input discard
0 Rx pause
The other end of the device is connected to 4500x chassi where not observing any interface errors.
I had changed Transceiver and Cable but still observing errors.
Can any one help to resolve the issue.
01-09-2020 01:19 PM
Hi,
Do you see the same issue if you connect the cable to a different port e.g e2/6?
HTH
01-09-2020 01:23 PM
Not observing .
But observed Rx stomped packet count is incrementing.
RX_PKT_CRC_NOT_STOMPED | 12888244 | 12888238 | 3
RX_PKT_CRC_STOMPED | 0 | 0 | 0
01-09-2020 01:27 PM
Can you provide the config for the port with issue?
sh run int tex/x
sh int tex/x
Is jumbo frame enabled on the switch?
HTH
01-09-2020 01:39 PM - edited 01-22-2020 05:08 AM
07-23-2020 11:27 AM
I am seeing a similar issue on my 5672UP. The input discard is happening on e1/7 for me. I found this article which provided some insight.
Running the command "sh hard internal bigsur all-ports" shows that e1/7 is associated with ASIC 1.
Running the command "sh plat soft qd info counters voq asic-num 1" displays
+----------+------------------------------+------------------------+-----------+
| port| TRANSMIT| TAIL DROP| HEAD DROP|
+----------+------------------------------+------------------------+-----------+
SUP_HI
QUEUE-0 169753328 31028747 0
SUP_LO
QUEUE-0 17 0 0
+----------+------------------------------+------------------------+-----------+
My question is: What is SUP_HI?
07-23-2020 01:59 PM - edited 07-23-2020 02:03 PM
I still do not know what SUP_HI is but I managed to fix my Input Discard issue. I had my gateway configured using
vrf context management
ip route 0.0.0.0/0 <gateway>
I replaced this with routes to specific subnets
vrf context management
ip route <subnet1> <gateway>
ip route <subnet2> <gateway>
07-24-2020 06:19 AM
SUP_HI and SUP_LO are the two interfaces connecting the Nexus 5k/6k CPU to the UPC (you can see them on the down-right UPC)
Stay safe,
Sergiu
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