© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
333333
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Show Platform CPU Statistics Fields:
• ESMP:
Even Simpler Management Protocol…used by the CPU for reading line card status:
link, speed, led, etc.
• Control:
L2 control plane packets go here—STP, CDP, PaGP, LACP, UDLD, etc.
• Host learning:
Packets with unknown L2 source address are copied to CPU to build CAM table
• L3 fwd:
GRE tunnels
Gleaning
• L2 fwd: Any non-IP switchable packet
IPX/Appletalk
Zero TTL field
Non-ARPA encapsulated packets
ARP’s
• L3 Rx:
L3 packets to the switch—SNMP, telnet, ping
• ACL forward
EIGRP/OSPF updates
343434
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
CPU Troubleshooting Commands:
Cisco IOS Supervisor
cat4500# show platform cpu packet statistics (all)>>> lots of output, look for
Total packet queues 16
Packets Received by Packet Queue
Queue Total 5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
Esmp 42808 38 38 34 6
Control 9919 11 10 8 1
Host Learning 39 0 0 0 0
L3 Fwd High 0 0 0 0 0
L3 Fwd Medium 0 0 0 0 0
L3 Fwd Low 0 0 0 0 0
L2 Fwd High 0 0 0 0 0
L2 Fwd Medium 0 0 0 0 0
L2 Fwd Low 99929 0 5 92 17
L3 Rx High 0 0 0 0 0
L3 Rx Low 36 0 0 0 0
RPF Failure 0 0 0 0 0
ACL fwd(snooping) 1165 1 1 1 0
ACL log, unreach 0 0 0 0 0
ACL sw processing 0 0 0 0 0
MTU Fail/Invalid 0 0 0 0 0
L2 and L3 High, Medium, and Low Are Based on the DSCP/COS
Field of the Packet
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