DCFM Enterprise User Manual (53-1001775-01, June 2010)

DCFM Enterprise User Manual 661
53-1001775-01
Tracing IP routes
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Tracing IP routes
The Management application enables you to select an source and a target and displays the
detailed routing information from the source port or area on the local switch to the destination port
or area on another switch.
Trace route cannot be performed on the offline devices or virtual devices.
NOTE
Trace route is only supported on Fabric OS devices running Fabric OS 5.2 or later.
To trace routes, complete the following steps.
1. Select Configure > IP Troubleshooting > Trace Route.
The IP Traceroute dialog box displays.
2. Select a switch from the Available Switches table.
3. Select a port from the GigE Port list.
4. Select an IP address switch from the IP Interface list.
5. Enter the remote IP address in the Remote IP Address field.
6. Click OK.
The IP Traceroute Result dialog box displays.
Traceroute sends three ICMP Ping packets to the destination address with a time to live (TTL)
of one hop, and expects a ‘TTL Expired’ error back from the first router to obtain the IP address
of the first hop. Traceroute then repeats the operation with a TTL of two hops to get the IP
address of the second hop. This process repeats for up to ten hops, or until a successful PING
response is received.
The IP Trace Details table displays the results of each attempt.
TABLE 34 IP Trace Details
Field or Component Description
Hop Number The TTL inserted in the transmitted probe packet.
IP Address 1 The IP address of the system that responded to the first of the three probes, or
0.0.0.0 if there was no response.
IP Address 2 The IP address of the system that responded to the second of the three probes, or
0.0.0.0 if there was no response.
IP Address 3 The IP address of the system that responded to the third of the three probes, or
0.0.0.0 if there was no response.
RTT 1 The time in milliseconds for the first of the three responses to be received, or blank
if there was no response. This value helps identify a congested or slow link in the
path.
RTT 2 the time in milliseconds for the second of the three responses to be received, or
blank if there was no response. This value helps identify a congested or slow link in
the path.
RTT 3 the time in milliseconds for the third of the three responses to be received, or
blank if there was no response. This value helps identify a congested or slow link in
the path.