100-a source-ip: Specifies the source IP address for MPLS echo request messages. By default, the MPLS LSRID is used as the source address of MPLS echo request messages.-exp exp-value: Specifies the EXP value of the label. The value range for the exp-value argument is 0 to7, and the default is 0.-h ttl-value: Specifies the maximum TTL value (maximum number of hops allowed) in MPLS echo requestmessages. The value range for the ttl-number argument is 1 to 255, and the default is 30.-m wait-time: Specifies the interval for performing LSP tracert. The value range for the wait-time argumentis 15 to 120 minutes, and the default is 60 minutes.-t time-out: Specifies the timeout time for waiting for the response of an MPLS echo request message. Thevalue range for the time-out argument is 0 to 65535 milliseconds, and the default is 2000 milliseconds.-u retry-attempt: Specifies the maximum number of times that MPLS echo request messages can be sentif no response is received. The value range for the retry-attempt argument is 1 to 9, and the default is 3.Usage guidelinesThe periodic LSP tracert function is for locating faults of an LSP periodically. It detects the consistency ofthe forwarding plane and control plane and records detection results into logs. You can know whetheran LSP has failed by checking the logs.If you configure BFD as well as periodic tracert for an LSP, once the periodic LSP tracert function detectsan LSP fault or inconsistency of the forwarding plane and control plane, the BFD session for the LSP willbe deleted and a new BFD session will be established according to the control plane.Examples# Enable periodic tracert for LSPs to destination 1.1.1.9/32. system-view[Sysname] mpls lspv[Sysname-mpls-lspv] periodic-tracert 1.1.1.9 32ping lsp ipv4Use ping lsp ipv4 to test the connectivity of the LSP for a FEC.Syntaxping lsp [ -a source-ip | -c count | -exp exp-value | -h ttl-value | -m wait-time | -r reply-mode | -spacket-size | -t time-out | -v ] * ipv4 dest-addr mask-length [ destination-ip-addr-header ]ViewsAny viewDefault command level0: Visit levelParameters-a source-ip: Specifies the source address for the echo request messages to be sent.-c count: Specifies the number of echo request messages to be sent. The value range for the countargument is 1 to 4294967295, and the default is 5.-exp exp-value: Specifies the EXP value for the echo request messages. The value range for the exp-valueargument is 0 to 7, and the default is 0.
