Cisco Catalyst 4500 Series - Example 3: Using Buffer Capture

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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
Chapter 56 Configuring Wireshark
Usage Examples for Wireshark
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.
Switch# monitor capture mycap start
Step 4 After sufficient time has passed, stop the capture.
Switch# monitor capture mycap stop
Note Alternatively, you can allow 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 5 Display the packets.
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 6 Delete the capture point.
Switch# no monitor capture mycap
Example 3: Using Buffer Capture
This example shows how to use buffer capture:
Step 1 Launch a capture session with the buffer capture option:
Switch# monitor capture mycap interface gi 3/1 in
Switch# monitor capture mycap match ipv4 any any
Switch# monitor capture mycap buffer circular size 1
Switch# monitor capture mycap start
Step 2 Determine whether the capture is active.
Switch# show monitor capture mycap
Status Information for Capture mycap
Target Type:
Interface: GigabitEthernet3/1, Direction: in