Chapter 21 Tests; Tracing A Packet - Cabletron Systems Netlink FRX8000 User Manual

Tracing a Packet

This operation traces the path a packet takes through the network. The procedure sends
one or more trace packets from a source node to a destination node. Event log mes-
sages tell you which intermediate nodes each packet passes through as it travels to its
final destination.
Here is the format of the printer messages:
(Date)(Time) TRACE source: "n"s dest: "n"d "n" current: "n"c
where:
indicates that this is a packet trace.
TRACE
is the ID of the source node.
source:"n"s
is the ID of the destination node.
dest: "n"d
is the segment number. Each time the trace packet arrives at a
seq#: "n"
node on its way to the destination node, the segment number
value is increased by one. Refer to the examples below for
further explanation.
is the current position of the trace packet in the network ("n"c
current: "n"c
is a node ID). When the current
destination
intended destination.
Here is an example of a series of packet trace messages:
971208 112947 TRACE source: 1 dest: 4 seg: 1 current: 2
971208 112947 TRACE source: 1 dest: 4 seg: 2 current: 3
971208 112947 TRACE source: 1 dest: 4 seg: 3 current: 4
This packet trace was performed on December 8, 1997 at about 11:30 a.m. The source
node specified by the operator was node 1 and the destination node was 4. The trace
packet was routed through nodes 2 and 3 to reach node 4. Notice that the segment
numbers kept a count of how many nodes recorded the path of the trace packet.
To initiate or discontinue a packet trace, press
the Main Menu). When prompted, enter:
:
Source Node ID 1–250
Destination Node ID
value, the trace packet has arrived at its
"n"d
[D]
.
: .
1–250
Chapter 22
value is the same as the
"n"c
at the Tests Menu (or
[E], [D]
Tests
from