Usage Scenario
In a scenario where NQA is associated with static routes, if a link is faulty, the NQA ICMP test fails, and the associated static route goes Down. As the device needs to search the routing table when sending ICMP test packets, the ICMP test still fails even if the link fault is rectified. In addition, the associated static route keeps being Down, and service traffic cannot be switched back to the original link.
To resolve this problem, specify a next-hop IP address for the ICMP test packets so that the packets can be properly sent after the link fault is rectified. This configuration also causes the test to succeed and the associated static route to go Up.
Configuration Impact
After a next-hop IP address is specified, test packets are directly sent based on the IP address, freeing the device from searching the routing table for packet sending.
Precautions
When specifying a next-hop IP address, run the source-interface command to specify an outbound interface. In this situation, the test must meet the following conditions. Otherwise, the test fails.
- The specified next-hop IP address and outbound interface match each other.
- The specified outbound interface cannot be a member interface of a logical interface.
No VPN is specified when you specify a next-hop IP address.
No simulated inbound interface is specified when you specify a next-hop IP address.