Viewing Cpu Traffic Statistics; Troubleshooting Cpu Packet Loss - Dell C9000 Series Networking Configuration Manual

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
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
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
tcam: color_indep=0,
Stage
InPorts
DATA=0x0000000000000000000000000000000000000000000000000000222222222222
MASK=0x0000000000000000000000000000000000000000000000000000222222222223
DstMac
Offset: 88 Width: 48
DATA=0x00000180 c2000000
Total packets:8
Total packets:168
Control Plane Policing (CoPP) 282