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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
 
Chapter 68      Configuring Wireshark
Usage Examples for Wireshark
  Status : Inactive
  Filter Details:
   IPv4
    Source IP:  any
    Destination IP:  any
   Protocol: any
  File Details:
   Associated file name: bootflash:mycap.pcap
  Buffer Details:
   Buffer Type: LINEAR (default)
  Limit Details:
   Number of Packets to capture: 100
   Packet Capture duration: 60
Step 3 Launch packet capture by entering:
Switch# monitor capture mycap start
Let the capture operation stop automatically after the time has elapsed or the packet count has been met.
The mycap.pcap file now contains the captured packets.
Step 4 Display the packets by entering:
Switch# show monitor capture file bootflash:mycap.pcap
  0.000000    10.1.1.30 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  1.000000    10.1.1.31 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  2.000000    10.1.1.32 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  3.000000    10.1.1.33 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  4.000000    10.1.1.34 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  5.000000    10.1.1.35 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  6.000000    10.1.1.36 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  7.000000    10.1.1.37 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  8.000000    10.1.1.38 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
  9.000000    10.1.1.39 -> 20.1.1.2     UDP Source port: 20001  Destination port: 20002
Step 5 Delete the capture point by entering:
Switch# no monitor capture mycap
Example: Simple Capture and Store of Packets in Egress Direction
This example shows how to capture live traffic and store the packets in egress direction using lock-step 
with high-speed mode.
Step 1 Define a capture point to match on the relevant traffic and associate it to a file by entering:
Switch# monitor capture mycap interface gi 3/1 out match ipv4 any any
Switch# monitor capture mycap limit duration 60 packets 100
Switch# monitor cap mycap file location bootflash:mycap.pcap buffer-size 90
Step 2 Confirm that the capture point has been correctly defined by entering:
Switch# show monitor capture mycap parameter
   monitor capture mycap interface GigabitEthernet3/1 out
   monitor capture mycap match ipv4  any any
   monitor capture mycap file location bootflash:mycap.pcap buffer-size 90
   monitor capture mycap limit packets 100000 duration 60
Switch# show monitor capture mycap
  Target Type:
   Interface: GigabitEthernet3/1, Direction: out