IPX/SPX Configuration and Management Manual

NonStop™ IPX/SPX PTrace Facility
IPX/SPX Configuration and Management Manual—425731-001
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Message System Interface Trace Records
INBOUND ipx
indicates an inbound IPX packet with source and destination IPX addresses
separated by ->.
CheckSum
displays the checksum of data in extended memory. This is set to FFFF (-1) by IPX
implementations. This field is neither computed for sending data nor checked when
receiving data.
Length
displays the total length of the IPX header plus data. The maximum packet length is
set by the higher-level protocol layer (such as SPX or NCP). NonStop™ IPX/SPX
imposes this limit on the IPX packet size.
PktType
specifies the higher-level protocol associated with the packet. IPX uses this field and
the socket number in the destination address to identify the process for which an
incoming packet is intended (see IPX Addresses
on page A-6).
TC
transport control (TC) is used by IPX routers and denotes the number of routers an
IPX packet crossed (hops used). The originating station sets this field to 0.
OCB
displays the IPXPROTO process open control block (OCB) index for the NonStop™
Himalaya S-series client’s OCB if this is related to a particular OPEN; otherwise,
OCB displays a zero.
IPX Data
indicates that data is being sent, in hexadecimal.
Message System Interface Trace Records
This subsection describes the trace records written by the Message System Interface
Layer.
Message System Request Trace Record
The trace record for a message system request is formatted as follows: