Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 656)

600 Brocade 6910 Ethernet Access Switch Configuration Guide
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IPv4 Interface
Console#
traceroute
This command shows the route packets take to the specified destination.
Syntax
traceroute host
host - IP address or alias of the host.
Default Setting
None
Command Mode
Privileged Exec
Command Usage
• Use the traceroute command to determine the path taken to reach a specified destination.
• A trace terminates when the destination responds, when the maximum time out (TTL) is
exceeded, or the maximum number of hops is exceeded.
• The traceroute command first sends probe datagrams with the TTL value set at one. This
causes the first router to discard the datagram and return an error message. The trace
function then sends several probe messages at each subsequent TTL level and displays the
round-trip time for each message. Not all devices respond correctly to probes by returning an
“ICMP port unreachable” message. If the timer goes off before a response is returned, the
trace function prints a series of asterisks and the “Request Timed Out” message. A long
sequence of these messages, terminating only when the maximum time out has been
reached, may indicate this problem with the target device.
• If the target device does not respond or other errors are detected, the switch will indicate this
by one of the following messages:
• * - No Response
• H - Host Unreachable
• N - Network Unreachable
• P - Protocol Unreachable
• O - Other
Example
Console#traceroute 192.168.0.1
Press "ESC" to abort.
Traceroute to 192.168.0.99, 30 hops max, timeout is 3 seconds
Hop Packet 1 Packet 2 Packet 3 IP Address
--- -------- -------- -------- ---------------
1 <10 ms <10 ms <10 ms 192.168.0.99
Trace completed.
Console#