Nortel Networks NN46110-602 - Manual (Page 123)

Chapter 5 Packet capture 123
Nortel VPN Router Troubleshooting
To create and use this capture object, you run commands like the ones illustrated
in this example. These commands do the following:
1 Create a capture object called test-trigger on Fast Ethernet interface 0/1.
2 Enter Capture Configuration mode for the object.
3 Set the start trigger to permit FTP.
4 Set the stop trigger to permit Telnet.
5 Exit Capture Configuration mode.
6 Start the capture.
CES# capture add test-trigger fastethernet 0/1
CES# capture test-trigger
CES(capture-ethernet)# trigger start "permit FTP"
CES(capture-ethernet)# trigger stop "permit Telnet"
CES(capture-ethernet)# exit
CES# capture test-trigger start
CES#
To view the status of the running capture object, as well as its configuration, use
the
show capture command. In this example, you can see that:
• The captured frames field indicates that the capture was triggered by the
receipt of FTP traffic.
• The start trigger discards field shows the number of packets discarded before
the start trigger was activated by the receipt of FTP traffic.
CES# show capture test-trigger
Capture state: RUNNING
Capture buffer size: 1048576
Capture type: ETHERNET
Capturing on interface: FastEthernet 0/1
Promiscuous mode is: DISABLED
Capturing MAX octets per frame: 4096
Captured frames: 107
Capture buffer utilization: 0%
Capturing direction: BIDIRECTIONAL
Capture buffer wrapping: DISABLED
Capture buffer wrapped: FALSE
Start trigger applied: permit FTP
Start trigger discards: 362
Stop trigger applied: permit Telnet
CES#