Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 593
Multicast Features, Querying reverse path for source 6.6.6.6 to destination
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Scenario Output -3 2.2.2.1 PIM - 99.99.0.0/16 -4 * * * * ---- If there is no response for mtrace even after switching to expanded hop search, the command displays an error message. R1>mtrace 99.99.99.99 1.1.1.1 Type Ctrl-C to abort. Querying reverse path for source 99.99.99.99 to destination 1.1.1.1 via RPF From source (?) to destination (?) * * * * switching to hop-by-hop: --- |Hop| OIF IP |Proto| Forwarding Code |Source Network/ Mask| --- 0 1.1.1.1 --> Destination -1 * * * * ---- Timed out receiving responses Perhaps no local router has a route for source, the receiver is not a member of the multicast group or the multicast ttl is too low. While traversing the path from source to destination, if the mtrace packet exhausts the maximum buffer size of the packet, then NO SPACE error is displayed in the output. You can initiate a new mtrace query by specifying the destination as the last IP address from the output of the previous trace query. R1>mtrace 99.99.99.99 1.1.1.1 Type Ctrl-C to abort. Querying reverse path for source 99.99.99.99 to destination 1.1.1.1 via RPF From source (?) to destination (?) --- |Hop| OIF IP |Proto| Forwarding Code |Source Network/ Mask| --- 0 1.1.1.1 --> Destination -1 1.1.1.1 PIM - 99.99.0.0/16 -2 101.101.101.102 PIM - 99.99.0.0/16 -3 2.2.2.1 PIM - 99.99.0.0/16 . . . -146 17.17.17.17 PIM No space in packet 99.99.0.0/16 ---- In a valid scenario, mtrace request packets R1>mtrace 6.6.6.6 4.4.4.5 are expected to be received on the OIF of the Type Ctrl-C to abort. node. However, due to incorrect formation of Querying reverse path for source 6.6.6.6 to destination the multicast tree, the packet may be 4.4.4.5 via RPF received on a wrong interface. In such a From source (?) to destination (?) Multicast Features 593
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