We have Nexu 3048 with 1 Gbps uplinks that have ~300-500 Mbps of traffic. I noticed, that there is massive amount of input discards on the uplink interfaces:
Ethernet1/52 is up Dedicated Interface Belongs to Po1 Hardware: 1000/10000 Ethernet, address: 003a.7d50.f53b (bia 003a.7d50.f53b) Description: rcnS00;G2/4/17;MH;DC;x;x MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec Load-Interval #2: 5 minute (300 seconds) input rate 172.22 Mbps, 24.44 Kpps; output rate 14.26 Mbps, 2.88 Kpps RX 662943483379 unicast packets 2662619555 multicast packets 1059169069 broad 0 input with dribble 633520490014 input discard +-----------------------------------------+-----------------+----------------+-------------------------------------+ | Counter Description | Count | Last Increment | Last Increment Time | +-----------------------------------------+-----------------+----------------+-------------------------------------+ IPv4 Discards 0 0 STP Discards 17 13 01-07-2019 12:16:22.321309 Policy Discards 0 0 ACL Drops 0 0 Receive Drops 142307726820 3407 04-06-2019 18:09:37.646092 Vlan Discards 142303991446 3987 04-06-2019 18:09:37.646092 +-----------------------------------------+-----------------+----------------+-------------------------------------+
There are literally tens of thousands of discards per second. I have no idea why this should be happening. Especially the VLAN discards make no sense since almost all vlans are allowed on the ports. NX-OS 6.0(2)U3(7).
Anyone seen anything like this?
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