User`s guide

Protocol Analyzer
Using Packet Capture Instances
5967–9446 357
To slice packets
1 Create a new instance, if necessary.
2 Select Settings➤Capture Buffer… from the base
window.
3 Choose the Truncate After point.
When Protocol Analyzer captures packets, it stores them in the capture
buffer. You can set the capture buffer to keep all packet data or slice off
and keep only the first part of each packet. This technique lets you make
better use of the capture buffer space by not cluttering it up with data
you don’t need.
The Truncate After option pop-up lets you choose how many bytes of
each packet to keep; choose from several slice points, or set this option to
Don’t Truncate to keep all packet data.
To specify which network interface to use
1 Create a new instance, if necessary.
2 Select Settings➤Interface… from the base window.
3 Choose the Interface Name to use from the option pop-
up menu.
Note: No packet capture occurs on Interface 1 (Ethernet) on the FDDI
probes J3321a and J3322a, since these devices do not support RMON. If
you attempt to create a packet capture on this interface of these probes,
you will get these error messages:
Received SNMP error “badvalue” for variable
Value: integer (1)
Agent : <IP address>
Cannot set control fields