© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
373737
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Monitoring the CPU on Cisco Catalyst 4500
IOS Supervisors
C(config)#monitor session 1 source cpu queue ?
<1-32> SPAN source CPU queue numbers
acl Input and output ACL [13-20]
adj-same-if Packets routed to the incoming interface
[7]
all All queues [1-32]
bridged L2/bridged packets [29-32]
control-packet Layer 2 Control Packets [5]
mtu-exceeded Output interface MTU exceeded [9]
nfl Packets sent to CPU by netflow (unused) [8]
routed L3/routed packets [21-28]
rpf-failure Multicast RPF Failures [6]
span SPAN to CPU (unused) [11]
unknown-sa Packets with missing source address [10]
r3_4506 #sh monitor session 1
Session 1
---------
Type : Local Session
Source Ports :
RX Only : CPU(Queues: 32)
Destination Ports : Fa3/37
Encapsulation : Native
Ingress : Disabled
Learning : Disabled
383838
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Ping Latency
• Low priority task on the CPU
• Response times of 7–10 ms are typical on
an idle switch
• Pings through the switch are handled as
ordinary data packets and switched in HW
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