Configuring the NQA MTrace Test to Check the RPF Path from the Multicast Source to the Querier
Context
To check the Reverse Path Forwarding (RPF) path from the multicast source to the querier, you can perform the NQA MTrace test.
By performing the MTrace test, you can obtain the possible transmission path of multicast packets. During the test, actual multicast data flows are not required.
The MTrace test can be used in multicast troubleshooting and routine maintenance to locate the faulty nodes and reduce configuration errors.
Procedure
- Run system-view
The system view is displayed.
- Run nqa test-instance admin-name test-name
An NQA test instance is created and the test instance view is displayed.
- Run test-type mtrace
The test type is set to MTrace.
- Run mtrace-source-address ipv4 ip-address
The address of the multicast source is specified.
- (Optional) Run vpn-instance vpn-instance-name
The VPN instance name is configured.
- (Optional) Adjust the performance of the NQA MTrace test
instance.
Run ttl number
The TTL value, that is, the maximum hops traced in max-hop mode is set for the IGMP-Tracert-Request packet.
Run tracert-livetime first-ttl first-ttl max-ttl max-ttl
The maximum hops traced in hop-by-hop mode is set. first-ttl must be set to 1.
Run mtrace-response-address ipv4 ip-address [ ttl value ]
The destination IP address and TTL of the IGMP-Tracert-Response packet are set.
Run description string
A description is configured for the test instance.
Run frequency interval
The test period is set for the NQA test instance.
Run timeout time
The timeout period of a probe is set for the NQA test instance.
Run probe-count number
The number of probes in each test is set.
Run records result number
The maximum number of result records is set for the NQA test instance.
Run agetime hh:mm:ss
The aging time is set for the NQA test instance.