Configuring the UDP tracert operation
The UDP tracert operation determines the routing path from the source device to the destination device.
Before you configure the UDP tracert operation, perform the following tasks:
Enable sending ICMP time exceeded messages on the intermediate devices between the source and destination devices. If the intermediate devices are HPE devices, use the ip ttl-expires enable command.
Enable sending ICMP destination unreachable messages on the destination device. If the destination device is an HPE device, use the ip unreachables enable command.
For more information about the ip ttl-expires enable and ip unreachables enable commands, see Layer 3—IP Services Command Reference.
The UDP tracert operation is not supported in IPv6 networks. To determine the routing path that the IPv6 packets traverse from the source to the destination, use the tracert ipv6 command. For more information about the command, see Network Management and Monitoring Command Reference.
To configure the UDP tracert operation:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Create an NQA operation and enter NQA operation view. | nqa entry admin-name operation-tag | By default, no NQA operations exist. |
3. Specify the UDP tracert operation type and enter its view. | type udp-tracert | N/A |
4. Specify the destination device for the operation. |
| By default, no destination IP address or host name is specified. |
5. (Optional.) Specify the destination port of UDP packets. | destination port port-number | By default, the destination port number is 33434. This port number must be an unused number on the destination device, so that the destination device can reply with ICMP port unreachable messages. |
6. (Optional.) Set the payload size for each UDP packet. | data-size size | The default setting is 100 bytes. |
7. (Optional.) Enable the no-fragmentation feature. | no-fragment enable | By default, the no-fragmentation feature is disabled. |
8. (Optional.) Set the maximum number of consecutive probe failures. | max-failure times | The default setting is 5. |
9. (Optional.) Set the TTL value for UDP packets in the start round of the UDP tracert operation. | init-ttl value | The default setting is 1. |
10. (Optional.) Specify an output interface for UDP packets. | out interface interface-type interface-number | By default, the output interface for UDP packets is not specified. The NQA client determines the output interface based on the routing table lookup. |
11. (Optional.) Specify the source port of UDP packets. | source port port-number | By default, no source port number is specified. |
12. (Optional.) Specify the source IP address of UDP packets. |
| By default, the packets take the primary IP address of the output interface as their source IP address. If you execute the source ip and source interface commands multiple times, the most recent configuration takes effect. The specified source interface must be up. The source IP address must be the IP address of a local interface, and the local interface must be up. Otherwise, no probe packets can be sent out. |