Using Layer 2 Traceroute; Understanding Layer 2 Traceroute - Cisco WS-C3560-48PS-S Software Configuration Manual
Software configuration guide
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Also See for WS-C3560-48PS-S:
- Product manual (20 pages) ,
- Hardware installation manual (120 pages)
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Using Layer 2 Traceroute
Note
Though other protocol keywords are available with the ping command, they are not supported in this
release.
This example shows how to ping an IP host:
Switch# ping 172.20.52.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 172.20.52.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Switch#
Table 35-1
Table 35-1 Ping Output Display Characters
Character
!
.
U
C
I
?
&
To terminate a ping session, enter the escape sequence (Ctrl-^ X by default). You enter the default by
simultaneously pressing and releasing the Ctrl, Shift, and 6 keys, and then pressing the X key.
Using Layer 2 Traceroute
This section describes this information:
•
•
•
Understanding Layer 2 Traceroute
The Layer 2 traceroute feature allows the switch to identify the physical path that a packet takes from a
source device to a destination device. Layer 2 traceroute supports only unicast source and destination
MAC addresses. It determines the path by using the MAC address tables of the switches in the path.
When the switch detects a device in the path that does not support Layer 2 traceroute, the switch
continues to send Layer 2 trace queries and lets them time out.
The switch can only identify the path from the source device to the destination device. It cannot identify
the path that a packet takes from source host to the source device or from the destination device to the
destination host.
Catalyst 3560 Switch Software Configuration Guide
35-14
describes the possible ping character output.
Description
Each exclamation point means receipt of a reply.
Each period means the network server timed out while waiting for a reply.
A destination unreachable error PDU was received.
A congestion experienced packet was received.
User interrupted test.
Unknown packet type.
Packet lifetime exceeded.
Understanding Layer 2 Traceroute, page 35-14
Usage Guidelines, page 35-15
Displaying the Physical Path, page 35-16
Chapter 35
Troubleshooting
78-16156-01
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Troubleshooting
