Command Reference Guide

184 ● tracert clns 3Com Router 5000 Family and Router 6000 Family
Command Reference
3 47.0001.0002.0001.000c.0035.00 20ms !A
Destination address unreachable
47.0001.0002.0001.000c.0036.00 10ms
47.0001.0002.0001.000c.0035.00 10ms !A
Destination address unreachable
4 47.0001.0001.0001.000a.0025.11 39ms
47.0001.0001.0001.000a.0025.11 39ms
47.0001.0001.0001.000a.0025.11 19ms
View This command can be used in the following views:
■ Any view
Description This command can be used to test the reachability of a specified network and
troubleshoot network problems.
Upon executed, the command first sends an ERQ packet with a TTL of 1 to the
destination. It sends another ERQ packet with a TTL of 2 when being replied with a
TTL timeout packet. The command continues sending ERQ packets to the destination,
each with its TTL 1 larger than that of its predecessor, until a TTL timeout packet sent
from the destination is received. You can obtain the nodes of the route that leads to
the destination by checking the source addresses of these TTL timeout packets.
When executing the tracert clns command, make sure that:
■ The IS is assigned a NET address. (Refer to the clns net command.)
■ CLNS is enabled globally. (Refer to the clns enable command.)
■ Generation of ER packets is enabled globally. (Refer to the clns erpacket
enable
command.)
Tabl e 32 Description on the fields of the tracert clns command
Field Description
* No response packet received when times out
! Error report packet received before times out (Error types are
described as follows)
N Unknown error type
P Packet format conflict with protocol
C Checksum error
G Packet discarded due to network congestion
H Cannot parse packet header
S Packet cannot be fragmented
I Incomplete packet
D Duplicated options
T Unsupported packet type
A Destination unreachable
O Unsupported or not specified option
V Wrong protocol version
Q QoS error
R Error in reassembling