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Interface eth1/20 is not showing any input drops or output drops, neither CRC errors. 9ACI_LE_TOLLOCA_151# show interface eth1/20 .... 30 seconds input rate 24512 bits/sec, 40 packets/sec 30 seconds output rate 3424 bits/sec, 2 packets/sec Load-Interval #2: 5 minute (300 seconds) input rate 25520 bps, 41 pps; output rate 2392 bps, 1 pps RX 1201 unicast packets 41 multicast packets 1 broadcast packets 1249 input packets 95894 bytes 0 jumbo packets 0 storm suppression bytes 0 runts 0 giants 0 CRC 0 Stomped CRC 0 no buffer 6 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 input buffer drop 0 input total drop 0 Rx pause TX 17 unicast packets 17 multicast packets 24 broadcast packets 58 output packets 10064 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 output buffer drops 0 output total drops 0 Tx pause However Qos Class 3 is showing lots of Tx Drops 9ACI_LE_TOLLOCA_151# show queuing interface eth1/20 ================================================================================ Qos Class level3 ================================================================================ Rx Admit Pkts : 1200 Tx Admit Pkts : 40 Rx Admit Bytes: 91692 Tx Admit Bytes: 8854 Rx Drop Pkts : 1 Tx Drop Pkts : 1178 <<<<<< Rx Drop Bytes : 381 Tx Drop Bytes : 79606
Port Policy Group is configured for Broadcast Traffic to be at 2%. 9ACI_LE_TOLLOCA_151# show interface counters storm-control -------------------------------------------------------------------------------- Port UcastSupp % McastSupp % BcastSupp % TotalSuppDiscards -------------------------------------------------------------------------------- ... Eth1/20 100.00 100.00 2.00 0 If we change it back to 100%, we still see the Storm Drop Errors. TX_FRM_ERROR is at 0. 9ACI_LE_TOLLOCA_151# vsh_lc -c 'show platform internal counters port 20' Stats for port 20 (note: forward drops includes sup redirected packets too) IF LPort Input Output Packets Bytes Packets Bytes eth-1/20 20 Total 1249 95894 58 10064 Unicast 1201 91816 17 7412 Multicast 15 960 41 2652 Flood 26 2594 0 0 Total Drops 1 1178 Storm Drops(bytes) 0 Buffer 0 0 Error 0 1178 <<<<< Forward 1 LB 0 AFD RED 0 Class 0 Admit 1200 40 Drop 1 1178 Class 1 Admit 0 1 Drop 0 0 Class 2 Admit 0 0 Drop 0 0 Class 3 Admit 15 0 Drop 0 0 Class 4 Admit 17 0 Drop 0 0 Class 5 Admit 0 0 Drop 0 0 Class 6 Admit 0 0 Drop 0 0 Class 7 Admit 0 0 Drop 0 0 Class SUP Admit 10 17 Drop 0 0 Class 9 Admit 0 0 Drop 0 0 Mac RMON RX_PKTOK 1243 RX_PKTTOTAL 1249 RX_FCS_ERR 0 RX_ANY_ERR 6 RX_OCTETSOK 95751 RX_OCTETS 95894 RX_UCAST 1201 RX_MCAST 41 RX_BCAST 1 RX_PAUSE 0 RX_INRANGEERR 0 RX_UNDERSIZE 0 RX_OVERSIZE 0 RX_FRAGMENT 6 RX_JABBER 0 RX_USER_PAUSE 0 RX_CRCERR 0 RX_TOOLONG 0 RX_VLAN 0 RX_DISCARD 0 RX_PKT_LT64 6 RX_PKT_64 606 RX_PKT_65 610 RX_PKT_128 19 RX_PKT_256 1 RX_PKT_512 0 RX_PKT_1024 7 RX_PKT_1519 0 RX_PKT_2048 0 RX_PKT_4096 0 RX_PKT_8192 0 RX_PKT_GT9216 0 TX_PKTOK 58 TX_PKTTOTAL 58 TX_FRM_ERROR 0 <<<<<
its case of the same port switching and the RWX drops them at egress SAME_IF_UC(6) : 0xf Doing similar test Learned an EP on Port 1/30 and sent traffic from 1/30 towards this EP and as expected since it same encap it will drop in egress eth-1/30 117 ENA Packets :- 70,072 +40,041 1,001/s 3 +2 0/s Bytes :- 4,866,670 +2,780,944 69,524/s 1,161 +774 38/s Drops(pkt):- 2 +2 0/s 70,000 +40,000 1,000/s eth-1/30 117 Total 560543 38931126 19 7353 Unicast 382659 26820512 19 7353 Multicast 0 0 0 0 Flood 167856 11414208 0 0 Total Drops 18 392106 Storm Drops(bytes) 0 Buffer 0 0 Error 0 392106 Forward 18 LB 0 AFD RED 0 Class 0 Admit 0 0 Drop 0 0 Class 1 Admit 0 0 Drop 0 0 Class 2 Admit 0 0 Drop 0 0 Class 3 Admit 0 0 Drop 0 0 Class 4 Admit 560523 0 Drop 0 392106 So its expected drops in this case in RWX and throws as Error drops. So its working as expected and ideally the traffic should have been forwarded by switch itself (if it learns) and need not enter ACI leaf if its local.
Customer is using custom QOS policies under the EPG where interface eth1/20 is being used.