Digi IX20 User Manual page 1115

Diagnostics
n ipchecksums: Calculate ip checksums.
n max_ttl: Specifies the maximum number of hops. (Default: 30)
n nomap: Do not map IP addresses to host names
n nqueries: Sets the number of probe packets per hop. (Default: 3)
n packetlen: Total size of the probing packet. (Default: -1)
n pausemsecs: Minimal time interval between probes (Default: 0)
n port: Specifies the destination port. (Default: -1)
n src_addr: Chooses an alternative source address.
n tos: Set Type of Service. (Default: -1)
n verbose: Verbose output.
n waittime: Max wait for a response to a probe. (Default: 5)
Example
This example shows using traceroute to verify that the IX20 device can route to host 8.8.8.8
(www.google.com) through the default gateway. The command output shows that 15 routing hops
were required to reach the host:
1. Select the device in Remote Manager and click Actions > Open Console, or log into the IX20
local command line as a user with full Admin access rights.
Depending on your device configuration, you may be presented with an Access selection
menu. Type admin to access the Admin CLI.
2. At the Admin CLI prompt, use the traceroute command to view IP routing information:
> traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 52 byte packets
1 192.168.8.1 (192.168.8.1)
2 10.10.10.10 (10.10.10.10)
3 * 10.10.8.23 (10.10.8.23)
4 96.34.84.22 (96.34.84.22)
5 96.34.81.190 (96.34.81.190)
6 * * *
7 96.34.2.12 (96.34.2.12)
8 * * *
9 8.8.8.8 (8.8.8.8)
>
By entering a whois command on a Unix device, the output shows that the route is as follows:
1. 192/8: The local network of the IX20 device.
2. 192.168.8.1: The local network gateway to the Internet.
3. 96/8: Charter Communications, the network provider.
4. 216/8: Google Inc.
Stop the traceroute process
To stop the traceroute process, enter Ctrl-C.
IX20 User Guide
Use the traceroute command to diagnose IP routing problems
0 ms 0 ms 0 ms
0 ms 2 ms 2 ms
1 ms 1 ms
1 ms 1 ms 1 ms
2 ms 2 ms
11 ms 11 ms 11 ms
11 ms 11 ms 11 ms
2 ms
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