HP-UX 11i Version 2 Release Notes (October 2003)

Internet and Networking
Network Tracing and Logging (NetTL)
Chapter 6
164
Network Tracing and Logging (NetTL)
The Network Tracing and Logging facility (NetTL) is a troubleshooting tool used to
gather information on network activity and networking products, by logging product
events and tracing inbound and outbound packets.
Summary of Change
The following changes have been made in this release of NetTL:
• IPv6 changes to support tracing and formatting of IPv6 packets
• Rearchitecture of the tracing framework in order to improve performance
• Provision of the graphical user interface (GUI) nettladm. The nettladm GUI was
shipped in HP-UX 11i v1 but not in HP-UX 11i v1.6
The following options have been added to nettl (1M):
• -mem <init_mem> [<max_mem>]:
— Used with first -traceon option only.
— Used to set the memory (in KB) which constitutes the trace buffers that hold the
trace messages until they are written to the file.
—<init_mem> is used to set the initial memory used for trace buffers when tracing
is turned on.
— More memory (after the initial allocation) is allocated on a need basis; that is,
when NetTL is not able to withstand the incoming traffic.
—<max_mem> is used to set the maximum memory that will be used for trace
buffers.
• -bind <cpu_id>:
— Used alone or with first -traceon option only.
— Used to specify the processor id to which the process that writes the trace
messages to disk is to be bound to.
The above information can be displayed using nettl -ss TRACE.
Impact
There are no impacts.
Compatibility
The PA Shared library libntl.sl (both 32 bit and 64 bit) has been changed due to
change in the transient storage of the tracing data before saving to disk. Therefore, this
library is shipped to support backward compatibility of 32-bit and 64-bit tracing
applications which are built on 11.00 and 11i. The PA Shared library libntl.1 is
shipped to support backward compatibility of 10.20 tracing applications.