OcNOS-RON : System Management Guide : System Management Command Reference : Interface Commands : show interface counters drop-stats
show interface counters drop-stats
Use this command to display the ingress and egress traffic discard reason counters on the interface.
Note: You can only display statistics for physical ports and cpu ports, but not for the out-of-band management (OOB) management port or logical interfaces.
Note: Drops in the CPU queue are listed under Tx Multicast Queue Drops, whether the packet is unicast or multicast
Command Syntax
show interface (IFNAME|) counters drop-stats
show interface cpu counters drop-stats
Parameter
IFNAME
Physical interface name
cpu
CPU interface
Command Mode
Exec mode and Privileged Exec mode
Applicability
This command was introduced before OcNOS version 1.3.1.
For Qumran devices, only error statistics are applicable and discard counters are not applicable. Only global level counters are available for advanced debugging using the command show hardware-discard-counters.
Example
#show interface xe32/2 counters drop-stats
+---------------------+----------------+----------------+--------------------+
| Counter Description | Count | Last Increment | Last Increment Time |
+---------------------+----------------+----------------+--------------------+
Rx Bad CRC errors 0 0
Rx Undersize errors 0 0
Rx Oversize errors 0 0
Rx Fragments errors 0 0
Rx Jabbers errors 0 0
Rx Port Block Drops 6 1 2016 Nov 09 08:59:33
Rx Vlan Discards 0 0
Rx ACL/QOS Drops 0 0
Rx Policy Discards 0 0
Rx EGR Port Unavail 38784 5 2016 Nov 09 18:19:31
Rx IBP Discards 0 0
Tx Port Block Drops 359 1 2016 Nov 09 08:59:33
Tx Vlan Discards 0 0
Tx TTL Discards 0 0
Tx Unknown Discards 359 1 2016 Nov 09 08:59:33
Tx Ucast Queue Drops 0 0
Tx Mcast Queue Drops 0 0
+---------------------+----------------+----------------+--------------------+
Table 20-44 explains the output fields.
 
Table 20-44: show interface counters drop-stats output details 
Field
Description
Counter Description
Shows the type of packet and/or the reason why the packet was dropped.
Count
The number of packets dropped for each reason.
Last Increment
Number of packets dropped since this command was last entered.
Last Increment Time
Date and time when the last packet was dropped.
Rx Bad CRC errors
Received packets dropped because they didn’t pass the cyclic Redundancy Check (CRC).
Rx Undersize errors
Number of received runt packets dropped.
Rx Oversize errors
Number of received giant packets dropped
Rx Fragments errors
Number of received packet fragments dropped
Rx Jabbers errors
Received packets dropped because of jabber – long packet error.
Rx Port Block Drops
Received packets dropped because port blocking is enabled (not applicable for Qumran platform).
Rx Vlan Discards
VLAN received packets dropped because there is no VLAN configured on the port (not applicable for Qumran platform).
Rx ACL/QOS Drops
Received packets match a field processing entry with a drop or color drop action, such as: User-configured ACL that denies traffic Service policy with a police action that drops the traffic received at a rate higher than the configured limit. (not applicable for Qumran platform)
Rx Policy Discards
Received packets dropped because of device policies violated, such as a storm control rate violation (not applicable for Qumran platform).
Rx EGR Port Unavail
No output port can be determined for these received packets. This counter increments along with other counter types in this table because it is a “catchall” for multiple types of discards as shown below (not applicable for Qumran platform):
 
VLAN check failed
MTU check failed
ACL/QoS drops
Policy discards
Source MAC is null
Destination IP/source IP address is null
Source MAC address and destination MAC address are the same
Forwarding lookup failure
Rx IBP Discards
Ingress Back Pressure (ingress congestion) when the ingress packets buffer is full for an interface. (not applicable for Qumran platform)
Tx Port Block Drops
Transmitted packets dropped because port blocking is enabled (not applicable for Qumran platform).
Tx Vlan Discards
Transmitted VLAN packets dropped because there is no VLAN configured on the port (not applicable for Qumran platform).
Tx TTL Discards
Transmitted packets discarded because their Time To Live (TTL) has ended. (not applicable for Qumran platform)
Tx Unknown Discards
Transmitted packets dropped for unknown reason. May have something to do with the condition/configuration of the port at the other end of the connection (not applicable for Qumran platform).
Tx Ucast Queue Drops
Transmitted packets dropped as a result of Unicast buffer overflow.
Tx Mcast Queue Drops
Transmitted packets dropped as a result of Multicast buffer overflow.
Last modified date: 08/28/2023