API Guide

Table Of Contents
SOURCE MISS Q16 LP 200 200 500 500
STATION MOVE Q16 LP 200 200 500 500
SFLOW_EGRESS Q20 LP 5000 5000 3000 3000
SFLOW_INGRESS Q20 LP 5000 5000 3000 3000
Troubleshooting CoPP Operation
To troubleshoot CoPP operation, use the debug commands described in this section.
Enabling CPU Traffic Statistics
During high-traffic network conditions, you may want to manually enable the collection of CPU traffic statistics by entering the debug
cpu-traffic-stats command. Statistic collection begins as soon as you enter the command, not when the system boots up.
The following message is displayed when the collection of CPU traffic statistics is enabled. Use the show cpu-traffic-stats
command to view the statistics.
Excessive traffic is received by CPU and traffic will be rate controlled.
NOTE: You must manually enable the collection of CPU traffic statistics with the debug cpu-traffic-stats
command before the statistics display in show cpu-traffic-stats output. It is recommended that when you finish
CoPP troubleshooting, you disable the collection of CPU traffic statistics by entering the
no debug cpu-traffic-
stats command.
Viewing CPU Traffic Statistics
To view the statistics collected on CPU traffic, use the show cpu-traffic-stats [cp | rp |all] command.
Traffic statistics are sorted on a per-interface basis; the interface receiving the most traffic is displayed first. All CPU and port information
is displayed unless you specify a port or CPU queue. Traffic information is displayed for router ports only, not for management interfaces.
CPU traffic statistics are collected only after you enter the
debug cpu-traffic-stats command, not from when the system boots
up.
Dell#show cpu-traffic-stats
Processor : CP
--------------
Received 100% traffic on fortyGigE 2/12 Total packets:8
LLC:0, SNAP:0, IP:5, ARP:0, other:3
Unicast:5, Multicast:3, Broadcast:0
Processor : RP
---------------
Received 100% traffic on fortyGigE 2/12 Total packets:168
LLC:0, SNAP:0, IP:165, ARP:0, other:3
Unicast:42, Multicast:126, Broadcast:0
NOTE:
When you finish troubleshooting CoPP operation, disable the collection of CPU traffic statistics by entering the
no debug cpu-traffic-stats command.
Troubleshooting CPU Packet Loss
To troubleshoot the reason for CPU packet loss, you can display statistics about system flows on the central switch (aggregated CoPP)
or on a specified set of switch ports by entering the show hardware system-flow[cp-switch | linecard slot-id
portset port-pipe] command. The number of hits for each system flow is also displayed.
Dell#show hardware system-flow linecard2 port-set 0
############## FP Entry for redirecting STP BPDU to CPU Port ################
EID 0x00000300: gid=0xa,
slice=9, slice_idx=0x1, part =0 prio=0x300, flags=0x10202, Installed, Enabled
Control Plane Policing (CoPP)
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